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Dandadzi M, Musundire R, Muriithi A, Ngadze RT. Effects of drying on the nutritional, sensory and microbiological quality of edible stinkbug (Encosternumdelgorguei). Heliyon 2023; 9:e18642. [PMID: 37576258 PMCID: PMC10413077 DOI: 10.1016/j.heliyon.2023.e18642] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2023] [Revised: 06/10/2023] [Accepted: 07/24/2023] [Indexed: 08/15/2023] Open
Abstract
Entomophagy has recently gained attention as a potential solution to the problems of food and nutritional security. One example is the consumption of edible stinkbug. Different drying techniques may affect the nutritional, microbiological and sensory properties of the edible stinkbugs. Thus, the study assessed the effects of toasting, microwave, oven and sun drying on the nutritional composition, microbiological quality and sensory attributes of processed edible stinkbugs. Drying significantly (p < 0.05) increased the crude protein and fat content of the edible stink bugs with the highest values being recorded for the toasted samples (66.65 & 37.17% respectively). Highest Ca, K, Zn, Mg, Fe and P values were recorded after microwave drying. Reduction of 2.94 and 2.99 log cycles of the total viable count (TVC) was observed in oven and microwave dried edible stinkbugs. Toasting and microwave drying eliminated the yeasts and moulds, Enterobacteriaceae and lactic acid bacteria (LAB) in edible stinkbugs. The appearance, aroma, taste, texture and overall acceptability scores were in the same order for toasted > oven dried > microwave dried > sun dried edible stinkbugs. Toasting, oven and microwave drying can be used for processing of edible stinkbugs.
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Affiliation(s)
- Melania Dandadzi
- School of Agricultural and Food Sciences, Jaramogi Oginga Odinga University of Science and Technology, P. O. Box 210-40601, Bondo, Kenya
- Department of Food Science and Technology, Chinhoyi University of Technology, P. O Box 7724, Chinhoyi, Zimbabwe
| | - Robert Musundire
- Research and Postgraduate Studies, Chinhoyi University of Technology, P. Bag 7724, Chinhoyi, Zimbabwe
| | - Alice Muriithi
- School of Agricultural and Food Sciences, Jaramogi Oginga Odinga University of Science and Technology, P. O. Box 210-40601, Bondo, Kenya
| | - Ruth T. Ngadze
- Department of Food Science and Technology, Chinhoyi University of Technology, P. O Box 7724, Chinhoyi, Zimbabwe
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Double-Fermented Soybean Meal Totally Replaces Soybean Meal in Broiler Rations with Favorable Impact on Performance, Digestibility, Amino Acids Transporters and Meat Nutritional Value. Animals (Basel) 2023; 13:ani13061030. [PMID: 36978571 PMCID: PMC10044553 DOI: 10.3390/ani13061030] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2023] [Revised: 03/04/2023] [Accepted: 03/08/2023] [Indexed: 03/16/2023] Open
Abstract
Inclusion of microbial fermented soybean meal in broiler feed has induced advantageous outcomes for their performance and gastrointestinal health via exhibiting probiotic effects. In this study, soybean meal (SBM) was subjected to double-stage microbial fermentation utilizing functional metabolites of fungi and bacteria. In broiler diet, DFSBM replaced SBM by 0, 25, 50 and 100%. DFSBM was reported to have higher protein content and total essential, nonessential and free amino acids (increased by 3.67%, 12.81%, 10.10% and 5.88-fold, respectively, compared to SBM). Notably, phytase activity and lactic acid bacteria increased, while fiber, lipid and trypsin inhibitor contents were decreased by 14.05%, 38.24% and 72.80%, respectively, in a diet containing 100% DFSBM, compared to SBM. Improved growth performance and apparent nutrient digestibility, including phosphorus and calcium, and pancreatic digestive enzyme activities were observed in groups fed higher DFSBM levels. In addition, higher inclusion levels of DFSBM increased blood immune response (IgG, IgM, nitric oxide and lysozyme levels) and liver antioxidant status. Jejunal amino acids- and peptide transporter-encoding genes (LAT1, CAT-1, CAT-2, PepT-1 and PepT-2) were upregulated with increasing levels of DFSBM in the ration. Breast muscle crude protein, calcium and phosphorus retention were increased, especially at higher inclusion levels of DFSBM. Coliform bacteria load was significantly reduced, while lactic acid bacteria count in broiler intestines was increased with higher dietary levels of DFSBM. In conclusion, replacement of SBM with DFSBM positively impacted broiler chicken feed utilization and boosted chickens’ amino acid transportation, in addition to improving the nutritional value of their breast meat.
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Experimental strategy of the spectrophotometric approach using freeze-drying for PO43- determination in frozen and chilled chickens in the Saudi Arabia market. JOURNAL OF SAUDI CHEMICAL SOCIETY 2023. [DOI: 10.1016/j.jscs.2023.101615] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
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Abstract
AbstractThe spectrophotometric molybdenum blue method for phosphorus determination was adapted to a multiwell plate format. The method was sensitive and allowed for the simultaneous determination of phosphorus in many samples. It was cheap and eco-friendly due to application of small volumes of reagents and, therefore, it meets the requirements for “green” or sustainable chemistry. The method’s limit of detection (LOD) is 0.37 μg/mL and its limit of quantification (LOQ) is 1.13 μg/mL. Its linearity is up to 30 μg of phosphorus/mL. The method was applied for the determination of phosphorus in 65 dairy products (yogurts, yogurt drinks, buttermilks, kefirs and homogenized cheeses) of strawberry, peach, forest fruits, vanilla and other flavours. The phosphorus content was 143–226 mg/100 g in flavoured yogurts, 78–204 mg/100 g in yogurt drinks, 89–218 mg/100 g in kefirs, around 195 mg/100 g in buttermilks, and 165–277 mg/100 g in homogenized cheeses. The presented method can be used in the routine quantitative analysis of the total phosphorus content in dairy products.
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Sperança MA, Mayorquín-Guevara JE, da Cruz MCP, de Almeida Teixeira GH, Pereira FMV. Biofortification quality in bananas monitored by energy-dispersive X-ray fluorescence and chemometrics. Food Chem 2021; 362:130172. [PMID: 34118507 DOI: 10.1016/j.foodchem.2021.130172] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2020] [Revised: 05/17/2021] [Accepted: 05/18/2021] [Indexed: 11/28/2022]
Abstract
Biofortification is a nutritional strategy used to enhance nutrients in a variety of staple foods. As bananas and plantains (Musa spp.) are considered staple food in many developing countries, monitoring zinc (Zn) content in biofortified bananas is crucial to ensure this mineral intake. Bananas were biofortified by injecting Zn sulfate heptahydrate (ZnSO4·7H2O) solutions into banana trees' pseudostem (1%, 2%, and 4%) compared with the control treatment. Zinc content was estimated using energy-dispersive X-ray fluorescence (EDXRF) and multivariate calibration using partial least squares (PLS). The impressive result is the possibility of high throughput analysis of Zn in bananas after biofortification to guarantee the quality when eaten as a central portion of the diet.
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Affiliation(s)
- Marco Aurelio Sperança
- São Paulo State University (UNESP), Institute of Chemistry, Group of Alternative Analytical Approaches (GAAA), Bioenergy Research Institute (IPBEN), Av. Prof. Francisco Degni, 55 - Jardim Quitandinha, Araraquara, São Paulo CEP: 14.800-060, Brazil
| | - Juan Esteban Mayorquín-Guevara
- São Paulo State University (UNESP), School of Agricultural and Veterinarian Sciences (FCAV), Jaboticabal Campus. Via de Acesso Prof. Paulo Donato Castellane s/n. Jaboticabal, São Paulo CEP: 14.884-900, Brazil
| | - Mara Cristina Pessoa da Cruz
- São Paulo State University (UNESP), School of Agricultural and Veterinarian Sciences (FCAV), Jaboticabal Campus. Via de Acesso Prof. Paulo Donato Castellane s/n. Jaboticabal, São Paulo CEP: 14.884-900, Brazil
| | - Gustavo Henrique de Almeida Teixeira
- São Paulo State University (UNESP), School of Agricultural and Veterinarian Sciences (FCAV), Jaboticabal Campus. Via de Acesso Prof. Paulo Donato Castellane s/n. Jaboticabal, São Paulo CEP: 14.884-900, Brazil
| | - Fabíola Manhas Verbi Pereira
- São Paulo State University (UNESP), Institute of Chemistry, Group of Alternative Analytical Approaches (GAAA), Bioenergy Research Institute (IPBEN), Av. Prof. Francisco Degni, 55 - Jardim Quitandinha, Araraquara, São Paulo CEP: 14.800-060, Brazil; National Institute of Alternative Technologies for Detection Toxicological Assessment and Removal of Micropollutants and Radioactive Substances (INCT-DATREM), São Paulo State University (UNESP), Institute of Chemistry, Av. Prof. Francisco Degni, 55 - Jardim Quitandinha, Araraquara, São Paulo, CEP: 14.800-060, Brazil.
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Pashkova GV, Smagunova AN, Finkelshtein AL. X-ray fluorescence analysis of milk and dairy products: A review. Trends Analyt Chem 2018. [DOI: 10.1016/j.trac.2018.06.014] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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Abstract
The main food quality traits of interest using non-invasive sensing techniques are sensory characteristics, chemical composition, physicochemical properties, health-protecting properties, nutritional characteristics and safety. A wide range of non-invasive sensing techniques, from optical, acoustical, electrical, to nuclear magnetic, X-ray, biosensor, microwave and terahertz, are organized according to physical principle.
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Affiliation(s)
- Zou Xiaobo
- Agricultural Product Processing and Storage Lab
- School of Food and Biological Engineering
- Key Laboratory of Modern Agriculture Equipment and Technology
- Jiangsu University
- Zhenjiang
| | - Huang Xiaowei
- Agricultural Product Processing and Storage Lab
- School of Food and Biological Engineering
- Key Laboratory of Modern Agriculture Equipment and Technology
- Jiangsu University
- Zhenjiang
| | - Malcolm Povey
- School of Food Science and Nutrition
- the University of Leeds
- Leeds LS2 9JT
- UK
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Li F, Liu Z, Sun T, Ma Y, Ding X. Confocal three-dimensional micro X-ray scatter imaging for non-destructive detecting foreign bodies with low density and low-Z materials in food products. Food Control 2015. [DOI: 10.1016/j.foodcont.2015.01.043] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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Stankey JA, Akbulut C, Romero JE, Govindasamy-Lucey S. Evaluation of X-ray fluorescence spectroscopy as a method for the rapid and direct determination of sodium in cheese. J Dairy Sci 2015; 98:5040-51. [PMID: 26051319 DOI: 10.3168/jds.2014-9055] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2014] [Accepted: 04/13/2015] [Indexed: 11/19/2022]
Abstract
Cheese manufacturers indirectly determine Na in cheese by analysis of Cl using the Volhard method, assuming that all Cl came from NaCl. This method overestimates the actual Na content in cheeses when Na replacers (e.g., KCl) are used. A direct and rapid method for Na detection is needed. X-ray fluorescence spectroscopy (XRF), a mineral analysis technique used in the mining industry, was investigated as an alternative method of Na detection in cheese. An XRF method for the detection of Na in cheese was developed and compared with inductively coupled plasma optical emission spectroscopy (ICP-OES; the reference method for Na in cheese) and Cl analyzer. Sodium quantification was performed by multi-point calibration with cheese standards spiked with NaCl ranging from 0 to 4% Na (wt/wt). The Na concentration of each of the cheese standards (discs: 30mm×7mm) was quantified by the 3 methods. A single laboratory method validation was performed; linearity, precision, limit of detection, and limit of quantification were determined. An additional calibration graph was created using cheese standards made from natural or process cheeses manufactured with different ratios of Na:K. Both Na and K calibration curves were linear for the cheese standards. Sodium was quantified in a variety of commercial cheese samples. The Na data obtained by XRF were in agreement with those from ICP-OES and Cl analyzer for most commercial natural cheeses. The XRF method did not accurately determine Na concentration for several process cheese samples, compared with ICP-OES, likely due to the use of unknown types of Na-based emulsifying salts (ES). When a calibration curve was created for process cheese with the specific types of ES used for this cheese, Na content was successfully predicted in the samples. For natural cheeses, the limit of detection and limit of quantification for Na that can be determined with an acceptable level of repeatability, precision, and trueness was 82 and 246mg/100g of cheese, respectively. Calibration graphs should be created with standards that reflect the concentration range, ratio, and salt type present in the cheeses. This XRF method can be successfully used for the rapid and direct measurement of Na content in a wide variety of natural cheeses. Commercial process cheese manufacturers use proprietary blends of ES. We did find that the XRF technique worked for process cheese when the calibration graphs were created with the specific types of ES actually used.
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Affiliation(s)
- J A Stankey
- Wisconsin Center for Dairy Research, University of Wisconsin, Madison 53706
| | - C Akbulut
- Wisconsin Center for Dairy Research, University of Wisconsin, Madison 53706
| | - J E Romero
- Wisconsin Center for Dairy Research, University of Wisconsin, Madison 53706
| | - S Govindasamy-Lucey
- Wisconsin Center for Dairy Research, University of Wisconsin, Madison 53706.
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Amina Setiawati T, Guyomarc’h F, Beaucher E, Gaucheron F. ION EXCHANGE CHROMATOGRAPHY WITH CONDUCTIVITY DETECTION COMPARED TO SPECTROPHOTOMETRY TO ASSAY PHOSPHATE IN MILK AND MILK PRODUCTS. JURNAL TEKNOLOGI DAN INDUSTRI PANGAN 2015. [DOI: 10.6066/jtip.2015.26.1.115] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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11
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Physicochemical and morphological properties of size-controlled chitosan–tripolyphosphate nanoparticles. Colloids Surf A Physicochem Eng Asp 2015. [DOI: 10.1016/j.colsurfa.2014.10.040] [Citation(s) in RCA: 138] [Impact Index Per Article: 15.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
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12
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Söğüt Ö, Kocaer A, Selçuk Zorer Ö, Özdemir Y, Doğru M. Micro-chemical and radiological characterization using γ-spectrometry and WDXRF spectrometry and annual effective dose of cigarette tobaccos. Microchem J 2014. [DOI: 10.1016/j.microc.2014.02.005] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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13
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CONSOLI L, CAMARGO GA. DETERMINATION OF MINERAL COMPOSITION OF ORGANIC AND CONVENTIONAL BEVERAGES BY DISPERSIVE ENERGY X-RAY FLUORESCENCE SPECTROMETRY. REVISTA BRASILEIRA DE ENGENHARIA DE BIOSSISTEMAS 2012. [DOI: 10.18011/bioeng2012v6n3p89-101] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/01/2022] Open
Abstract
Fruits are natural sources of minerals whose ingestion is recommended in a balanced diet. The increasing consumption of fruit-based beverages demands the development of rapid methods to evaluate their quality parameters. X-ray fluorescence spectrometry is an analytical-nuclear technique that is gaining space in the environmental and geological fields, and has been explored modestly in the food field. The main objective of this work was to develop a methodology to determine the mineral content of fruit-based beverages by applying this technique. Beverages manufactured from organic and conventional fruit varieties were evaluated, aiming to compare their nutritional value. The research was divided into three steps: in the first step, a direct measurement of the samples was made, that is, without prior preparation; in the second, standard curves were prepared with the elements of calcium and potassium, based on the category of ‘fine samples’. Lastly, these curves were used to determine concentrations of calcium and potassium in the samples of juices and pulps prepared as ‘fine samples’. The fine sample measurements showed results more exact compared to that obtained from the direct measurements. From the data evaluated, it was not possible to attribute better nutritional quality to either the organic or conventional samples.
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Affiliation(s)
- L. CONSOLI
- State University of Campinas, Faculty of Food Engineering
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14
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HABIB-UR-REHMAN, REHANA ISHRAT, YAWAR WASIM. Determination of inorganic elements in milk powder using wavelength dispersive X-ray fluorescence spectrometer. INT J DAIRY TECHNOL 2011. [DOI: 10.1111/j.1471-0307.2011.00730.x] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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15
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Lee JH, Choung MG. Nondestructive determination of herbicide-resistant genetically modified soybean seeds using near-infrared reflectance spectroscopy. Food Chem 2011. [DOI: 10.1016/j.foodchem.2010.10.106] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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16
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Determination of phosphorus, sulfur and the halogens using high-temperature molecular absorption spectrometry in flames and furnaces—A review. Anal Chim Acta 2009; 647:137-48. [DOI: 10.1016/j.aca.2009.06.029] [Citation(s) in RCA: 129] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2009] [Revised: 06/04/2009] [Accepted: 06/11/2009] [Indexed: 11/17/2022]
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Ozdemir Y, Börekci B, Levet A, Kurudirek M. Assessment of trace element concentration distribution in human placenta by wavelength dispersive X-ray fluorescence: effect of neonate weight and maternal age. Appl Radiat Isot 2009; 67:1790-5. [PMID: 19647442 DOI: 10.1016/j.apradiso.2009.06.007] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2008] [Revised: 04/10/2009] [Accepted: 06/08/2009] [Indexed: 10/20/2022]
Abstract
Trace element status in human placenta is dependent on maternal-neonatal characteristics. This work was undertaken to investigate the correlation between essential trace element concentrations in the placenta and maternal-neonatal characteristics. Placenta samples were collected from total 61 healthy mothers at gestation between 37 and 41 weeks. These samples were investigated with the restriction that the mother's age was 20-40 years old and the neonate's weight was 1-4kg. Percent concentrations of trace elements were determined using wavelength dispersive X-ray fluorescence (WDXRF). The placenta samples were prepared and analyzed without exposure to any chemical treatment. Concentrations of Fe, Cu and Zn in placenta tissues were found statistically to vary corresponding to the age of the mother and weight of the neonate. In the subjects, the concentration of Fe and Cu were increased in heavier neonates (p<0.05) and the concentration of Zn was increased with increasing mother age (p<0.05). Consequently, the Fe, Cu and Zn elements appear to have interactive connections in human placenta.
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Affiliation(s)
- Yüksel Ozdemir
- Department of Physics, Ataturk University School of Arts and Sciences, Erzurum, Turkey.
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18
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Pashkova GV. X-ray Fluorescence Determination of Element Contents in Milk and Dairy Products. FOOD ANAL METHOD 2009. [DOI: 10.1007/s12161-009-9080-5] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Palmer PT, Jacobs R, Baker PE, Ferguson K, Webber S. Use of field-portable XRF analyzers for rapid screening of toxic elements in FDA-regulated products. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2009; 57:2605-13. [PMID: 19334748 DOI: 10.1021/jf803285h] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
Abstract
Analytical instrumentation continues its amazing evolution, especially in regard to generating ever more sensitive, faster, and reliable measurements. Perhaps the most difficult challenges are making these instruments small enough to use in the field, equipping them with well-designed software that facilitates and simplifies their use by nonexperts while preserving enough of their analytical capabilities to render them useful for a wide variety of applications. Perhaps the most impressive and underappreciated example of instruments that meet these criteria are field-portable X-ray fluorescence (XRF) analyzers. In the past, these analyzers have been routinely used for environmental applications (lead in paint and soil, metal particulates in air samples collected onto filters), geology studies (ore and soil analysis, precious metal identification), and recycling industries (alloy identification). However, their use in the analysis of toxic elements in food, food ingredients, dietary supplements, and medicinal and herbal products, especially within the FDA and regulatory environments, has been surprisingly limited to date. Although XRF will not replace atomic spectrometry techniques such as ICP-MS for sub-parts per million level analyses, it offers a number of significant advantages including minimal sample preparation, high sample throughputs, rapid and definitive identification of many toxic elements, and accurate quantitative results. As should be obvious from many recent news reports on elevated levels of toxic elements in children's lunchboxes, toys, and supplements, field-portable XRF analyzers can fill a very important niche and are becoming increasingly popular for a wide variety of elemental analysis applications. This perspective begins with a brief review of the theory of XRF to highlight the underlying principle, instrumentation, and spectra. It includes a discussion of various analytical figures of merit of XRF to illustrate its strengths and limitations compared to existing methods such as ICP-MS. It concludes with a discussion of a number of different FDA applications and case studies in which XRF has been used to screen, identify, and in some cases quantify toxic elements in various products. This work clearly demonstrates that XRF analyzers are an exceedingly valuable tool for routine and nonroutine elemental analysis investigations, both in the laboratory and in the field. In the future, it is hoped that both field-portable and laboratory-grade XRF analyzers will see more widespread use for investigational and forensic-type applications of food and other regulated consumer products.
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Affiliation(s)
- Peter T Palmer
- Department of Chemistry and Biochemistry, San Francisco State University, San Francisco, California 94132, USA.
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New trends in bioanalytical tools for the detection of genetically modified organisms: an update. Anal Bioanal Chem 2008; 392:355-67. [DOI: 10.1007/s00216-008-2193-7] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2008] [Revised: 05/15/2008] [Accepted: 05/16/2008] [Indexed: 10/22/2022]
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21
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Application of energy dispersive X-ray fluorescence spectrometry as multielemental analysis to determine the elemental composition of crumb rubber samples. Microchem J 2008. [DOI: 10.1016/j.microc.2007.08.007] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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22
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Garg AN, Kumar A, Choudhury RP. Phosphorus in biological standards and samples by thermal neutron irradiation and β-counting. J Radioanal Nucl Chem 2007. [DOI: 10.1007/s10967-007-0234-x] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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23
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Xie L, Ying Y, Ying T, Yu H, Fu X. Discrimination of transgenic tomatoes based on visible/near-infrared spectra. Anal Chim Acta 2007; 584:379-84. [PMID: 17386628 DOI: 10.1016/j.aca.2006.11.071] [Citation(s) in RCA: 95] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2006] [Revised: 11/24/2006] [Accepted: 11/28/2006] [Indexed: 11/20/2022]
Abstract
VIS-NIR spectroscopy combined with multivariate analysis after the appropriate spectral data pre-treatment has been proved to be a very powerful tool for judgment of the relative pattern of the objects that have very similar properties. In this study, seventy transgenic tomatoes with antisense LeETR2 and 94 of their parents, non-transgenic ones were measured in VIS-NIR diffuse reflectance mode. Principal component analysis (PCA), discriminant analysis (DA) and partial least-squares discriminant analysis (PLSDA) were applied to classify tomatoes with different genes into two groups. Calibrations were developed using PLS regression with the leave-one-out cross-validation technique. The results show that differences between transgenic and non-transgenic tomatoes do exist and excellent classification can be obtained after optimizing spectral pre-treatment. The correct classifications for transgenic and non-transgenic tomatoes were both 100% using PLSDA after derivative spectral pre-treatment. The raw spectra with PLSDA model after the second derivative pre-treatment had the best satisfactory calibration and prediction abilities, with r(c)=0.97964, root mean square error of calibration (RMSEC)=0.099, r(cv)=0.97963, root mean square error of cross-validation (RMSECV)=0.0993 and a factor. The results in the present study show VIS-NIR spectroscopy together with chemometrics techniques could be used to differentiate transgenic tomato, which offers the benefit of avoiding time-consuming, costly and laborious chemical and sensory analysis.
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Affiliation(s)
- Lijuan Xie
- College of Biosystems Engineering and Food Science, Zhejiang University, 268 Kaixuan St., 310029 Hangzhou, PR China
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