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Diana A, Rahmannia S, Suhadi YZ, Luftimas DE, Rizqi H, Purnamasari AD, Jihadillah A, Ansari MB, Haq DAZ, Pratiwi AN, Scott S, Hampel D, Allen LH, Haszard JJ, Houghton LA, Gibson RS, Fahmida U. Chicken liver and eggshell crackers as a safe and affordable animal source food for overcoming micronutrient deficits during pregnancy and lactation in Indonesia: a double-blind, randomised placebo-controlled trial (SISTIK Growth Study). Wellcome Open Res 2022; 7:167. [PMID: 35865219 PMCID: PMC9270652 DOI: 10.12688/wellcomeopenres.17879.1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 05/09/2022] [Indexed: 11/20/2022] Open
Abstract
Background: Indonesia ranks fifth in terms of the number of stunted children and there has been little change in the stunting prevalence in the last decade. In earlier observational studies conducted in 2014-2015, we identified several key underlying problems with the potential to impact stunting in Sumedang district, West Java, Indonesia. Deficits in intakes of growth-limiting micronutrients were observed, most notably calcium, iron, zinc, and vitamin A, emphasizing the need for a food-based intervention to overcome these micronutrient deficits in the diets of mothers and their infants. Methods: A double-blind placebo-controlled cluster randomised trial comparing the effect of daily consumption of 75 grams of locally produced micronutrient-enriched crackers (MEC) (intervention group) compared to placebo crackers (control group) by mothers at two-time intervals: (i) from the 8-14 weeks of pregnancy to delivery (i.e., 28-34 weeks of consumption of MEC) on birth length, and (ii) from the 8-14 weeks of pregnancy to 5 months post-partum on attained linear growth and linear growth velocity of breast-fed infants. A total of 324 pregnant women from 28 clusters (villages) located in 3 sub-districts in Sumedang district, West Java, Indonesia, will be randomly assigned to either intervention (n=14 villages) or control (n=14 villages). Discussion: This will be the first study in Indonesia to use crackers based on powdered eggshells and chicken liver, in a form which is acceptable, safe, and has a long shelf life. If daily consumption of MEC for 6 months during pregnancy can enhance birth length, or their continued daily consumption for 5 months postpartum improves both attained and incremental linear growth at 5 months of age, then scaling-up in Indonesia may be considered. Trial Registration:
https://clinicaltrials.gov/ct2/show/NCT04564222; 25
th September 2020
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Affiliation(s)
- Aly Diana
- Department of Public Health, Faculty of Medicine, Universitas Padjadjaran, Bandung, 40161, Indonesia
- Nutrition Working Group, Faculty of Medicine, Universitas Padjadjaran, Bandung, 40161, Indonesia
- Southeast Asian Ministers of Education Organization Regional Center for Food and Nutrition (SEAMEO RECFON), Pusat Kajian Gizi Regional Universitas Indonesia, Jakarta, 13120, Indonesia
| | - Sofa Rahmannia
- Faculty of Medicine, Universitas Pasundan, Bandung, 40117, Indonesia
- School of Population and Global Health, University of Western Australia, Crawley, Western Australia, 6009, Australia
| | - Yenni Zuhairini Suhadi
- Department of Public Health, Faculty of Medicine, Universitas Padjadjaran, Bandung, 40161, Indonesia
- Nutrition Working Group, Faculty of Medicine, Universitas Padjadjaran, Bandung, 40161, Indonesia
| | - Dimas Erlangga Luftimas
- Department of Public Health, Faculty of Medicine, Universitas Padjadjaran, Bandung, 40161, Indonesia
- Nutrition Working Group, Faculty of Medicine, Universitas Padjadjaran, Bandung, 40161, Indonesia
| | - Haidar Rizqi
- Nutrition Working Group, Faculty of Medicine, Universitas Padjadjaran, Bandung, 40161, Indonesia
| | - Afini Dwi Purnamasari
- Nutrition Working Group, Faculty of Medicine, Universitas Padjadjaran, Bandung, 40161, Indonesia
| | - Ayunda Jihadillah
- Nutrition Working Group, Faculty of Medicine, Universitas Padjadjaran, Bandung, 40161, Indonesia
| | - Mohammad Brachim Ansari
- Nutrition Working Group, Faculty of Medicine, Universitas Padjadjaran, Bandung, 40161, Indonesia
| | - Dearly Ayu Zahrotun Haq
- Nutrition Working Group, Faculty of Medicine, Universitas Padjadjaran, Bandung, 40161, Indonesia
| | - Aisyah Nur Pratiwi
- Nutrition Working Group, Faculty of Medicine, Universitas Padjadjaran, Bandung, 40161, Indonesia
| | - Samuel Scott
- Poverty Health and Nutrition Division, International Food Policy Research Institute, Poverty Health and Nutrition Division, New Delhi, 110012, India
| | - Daniela Hampel
- Department of Nutrition, University of California, One Shields Ave, Davis, 95616, USA
- USDA, ARS-Western Human Nutrition Research Center, Davis, CA, 95616, USA
| | - Lindsay H Allen
- Department of Nutrition, University of California, One Shields Ave, Davis, 95616, USA
- USDA, ARS-Western Human Nutrition Research Center, Davis, CA, 95616, USA
| | - Jillian J Haszard
- Biostatistics Centre, University of Otago, Dunedin, 9054, New Zealand
| | - Lisa A Houghton
- Department of Human Nutrition, University of Otago, Dunedin, 9016, New Zealand
| | - Rosalind S Gibson
- Department of Human Nutrition, University of Otago, Dunedin, 9016, New Zealand
| | - Umi Fahmida
- Southeast Asian Ministers of Education Organization Regional Center for Food and Nutrition (SEAMEO RECFON), Pusat Kajian Gizi Regional Universitas Indonesia, Jakarta, 13120, Indonesia
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Card DJ, Freke EC, Harrington DJ. Characterisation and traceability of two generations of standard reference material for the measurement of vitamin K
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(phylloquinone) at endogenous concentrations in human plasma and serum. Biomed Chromatogr 2022; 36:e5378. [DOI: 10.1002/bmc.5378] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2021] [Revised: 03/16/2022] [Accepted: 04/01/2022] [Indexed: 11/08/2022]
Affiliation(s)
- D. J. Card
- Nutristasis Unit, St. Thomas’ Hospital London
| | - E. C. Freke
- Nutristasis Unit, St. Thomas’ Hospital London
| | - D. J. Harrington
- Nutristasis Unit, St. Thomas’ Hospital London
- Faculty of Life Sciences and Medicine, King's College London London UK
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Wise SA. From urban dust and marine sediment to Ginkgo biloba and human serum-a top ten list of Standard Reference Materials (SRMs). Anal Bioanal Chem 2022; 414:31-52. [PMID: 34291299 PMCID: PMC8748289 DOI: 10.1007/s00216-021-03527-w] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2021] [Revised: 06/25/2021] [Accepted: 07/02/2021] [Indexed: 02/07/2023]
Abstract
During the past 40 years, the National Institute of Standards and Technology (NIST) has developed over 180 natural matrix Standard Reference Materials® (SRMs) for the determination of trace organic constituents in environmental, clinical, food, and dietary supplement matrices. A list of the Top Ten SRMs intended for organic analysis was identified based on selection criteria including analytical challenge to assign certified values, challenges in material preparation, novel matrices, longevity, widespread use, and unique design concept or intended use. The environmental matrix SRMs include air particulate matter, marine sediment, mussel tissue, and human serum with the focus on contaminants such as polycyclic aromatic hydrocarbons (PAHs), polychlorinated biphenyls (PCBs), chlorinated pesticides, and polybrominated diphenyl ethers (PBDEs). Human serum and plasma SRMs for clinical diagnostic markers including vitamin D metabolites represent clinical analysis, whereas infant formula, multivitamin/multielement tablets, and Ginkgo biloba constitute the food and dietary supplement matrices on the list. Each of the SRMs on the Top Ten list is discussed relative to the selection criteria and significance of the material, and several overall lessons learned are summarized.
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Affiliation(s)
- Stephen A Wise
- Office of Dietary Supplements, National Institutes of Health, Bethesda, MD, 20892, USA.
- Chemical Sciences Division, National Institute of Standards and Technology (NIST), Gaithersburg, MD, 20899, USA.
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Evolution of reference materials for the determination of organic nutrients in food and dietary supplements-a critical review. Anal Bioanal Chem 2018; 411:97-127. [PMID: 30506091 DOI: 10.1007/s00216-018-1473-0] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2018] [Revised: 10/30/2018] [Accepted: 11/05/2018] [Indexed: 10/27/2022]
Abstract
For over 40 years, food-matrix certified reference materials (CRMs) have been available for determination of trace element content, and a wide variety of materials are available from most producers of CRMs. However, the availability of food-matrix CRMs for organic nutrients has been more limited. The European Commission (EC) Bureau Communautaire de Référence (BCR) and the National Institute of Standards and Technology (NIST) introduced food-matrix CRMs with values assigned for vitamins and other organic nutrients such as fatty acids and carotenoids in the 1990s. The number of organic nutrients for which values were assigned has increased significantly in the past decade, and the approach and analytical methods used for assignment of the certified values have also evolved. Recently, dietary supplement-matrix CRMs such as multivitamin tablets with values assigned for vitamins and carotenoids, and fish and plant oils with values assigned for fatty acids have appeared. The development, evolution, and improvement of food- and dietary supplement-matrix CRMs for determination of vitamins, carotenoids, and fatty acids are described, with emphasis on CRMs made available in the past 10 years. Recent food and dietary supplement CRMs for the determination of organic nutrients include infant formula, multivitamin tablets, milk and egg powders, breakfast cereal, meat homogenate, blueberries, soy flour, fish and plant oils, dry cat food, and protein drink powder. Many of these food- and supplement-matrix CRMs have values assigned for over 80 organic and inorganic nutrients, toxic elements, proximates, and contaminants. The review provides a critical assessment of the challenges and evolving improvements in the production and the analytical methods used for value assignment of these CRMs. The current status and future needs for additional food- and dietary supplement-matrix CRMs for organic nutrients are also discussed. Graphical abstract Food Composition Triangle with currently-available food-matrix certified reference materials (CRMs) for the determination of organic nutrients positioned according to fat, protein, and carbohydrate composition.
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Contribution of folic acid-fortified foods to fertile women's folate Recommended Nutrient Intake through breakfast simulation models. Public Health Nutr 2014; 18:1960-8. [PMID: 25430854 DOI: 10.1017/s1368980014002572] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
OBJECTIVE To assess the potential contribution of foods fortified with folic acid (FA) to target population intakes when included as part of a healthy breakfast. DESIGN Breakfast models aligned with the Spanish Dietary Guidelines were studied using the recommended, average and 95th percentile of serving sizes consumed by women of childbearing age. Food composition data were obtained from a database including FA analytical data from sixty-eight products and the Spanish food composition tables. Different scenarios were assessed with the inclusion of one, two or three FA-fortified products and with two different fortification levels: ≤ 33 µg/serving (L1) and ≥ 70 µg/serving (L4). FA contents provided by the different models for each scenario were compared with the Recommended Nutrient Intake (RNI) for folate and the Upper Level (UL) of intake for FA. SETTING Madrid Region, Spain. SUBJECTS Women aged 16-49 years were considered. RESULTS Overall, simulation of ten breakfast models and three scenarios of product inclusion accounted for 20-25% of total daily energy recommendations for women. Unfortified breakfast models provided on average 4-23% of the folate RNI. Inclusion of one L4 FA-fortified food contributed 20-60% of the RNI. Fortified yoghurt and milk had the highest FA contents per serving. Scenarios with two or three fortified products delivered 40-80% of the RNI. None of the evaluated models exceeded the FA UL. CONCLUSIONS At existing levels of FA fortification, inclusion of fortified products as part of a regular breakfast meal could positively impact the nutritional quality of women's diet without involving a risk of excessive FA exposure.
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Samaniego-Vaesken ML, Alonso-Aperte E, Varela-Moreiras G. Voluntary fortification with folic acid in Spain: An updated food composition database. Food Chem 2014; 193:148-53. [PMID: 26433301 DOI: 10.1016/j.foodchem.2014.06.046] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2014] [Revised: 04/22/2014] [Accepted: 06/08/2014] [Indexed: 11/26/2022]
Abstract
Folic acid (FA) is a key vitamin in the prevention of many diseases including neural tube defects. In Spain, only voluntary FA food fortification is allowed and there is a lack of compositional data to assess the contribution of these products to population's dietary folate intakes. Since 2007, our group has been compiling and updating a FA fortified food composition database. FA levels were obtained from retailers in Madrid and information provided by manufacturers. FA was also quantified by an affinity chromatography-HPLC method. In the present study we recorded 375 products. Our results show a high variability in the declared FA levels amongst different products, and food groups, which is also dependant on the commercial brand. FA overages are commonly added by manufacturers to some fortified products. FA content label claims are missing in 64% of products. This database is a useful tool to manage FA fortified foods data but it is necessary to continuously update it for the sound evaluation and monitoring of population's FA dietary intakes.
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Affiliation(s)
- M L Samaniego-Vaesken
- Departamento de Ciencias Farmacéuticas y de la Salud, Facultad de Farmacia, Universidad CEU San Pablo, Madrid, Spain.
| | - E Alonso-Aperte
- Departamento de Ciencias Farmacéuticas y de la Salud, Facultad de Farmacia, Universidad CEU San Pablo, Madrid, Spain
| | - G Varela-Moreiras
- Departamento de Ciencias Farmacéuticas y de la Salud, Facultad de Farmacia, Universidad CEU San Pablo, Madrid, Spain
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7
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Samaniego-Vaesken M, Alonso-Aperte E, Varela-Moreiras G. Voluntary food fortification with folic acid in Spain: Predicted contribution to children’s dietary intakes as assessed with new food folate composition data. Food Chem 2013; 140:526-32. [DOI: 10.1016/j.foodchem.2013.01.092] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2011] [Revised: 01/18/2013] [Accepted: 01/30/2013] [Indexed: 10/27/2022]
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8
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Characterization of NIST food-matrix Standard Reference Materials for their vitamin C content. Anal Bioanal Chem 2013; 405:4539-48. [PMID: 23529413 DOI: 10.1007/s00216-013-6891-4] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2013] [Revised: 02/26/2013] [Accepted: 02/27/2013] [Indexed: 10/27/2022]
Abstract
The vitamin C concentrations in three food-matrix Standard Reference Materials (SRMs) from the National Institute of Standards and Technology (NIST) have been determined by liquid chromatography (LC) with absorbance detection. These materials (SRM 1549a Whole Milk Powder, SRM 1849a Infant/Adult Nutritional Formula, and SRM 3233 Fortified Breakfast Cereal) have been characterized to support analytical measurements made by food processors that are required to provide information about their products' vitamin C content on the labels of products distributed in the United States. The SRMs are primarily intended for use in validating analytical methods for the determination of selected vitamins, elements, fatty acids, and other nutrients in these materials and in similar matrixes. They can also be used for quality assurance in the characterization of test samples or in-house control materials, and for establishing measurement traceability. Within-day precision of the LC method used to measure vitamin C in the food-matrix SRMs characterized in this study ranged from 2.7% to 6.5%.
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10
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Role of chromatography in the development of Standard Reference Materials for organic analysis. J Chromatogr A 2012; 1261:3-22. [PMID: 22721765 DOI: 10.1016/j.chroma.2012.05.093] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2012] [Revised: 05/24/2012] [Accepted: 05/25/2012] [Indexed: 11/22/2022]
Abstract
The certification of chemical constituents in natural-matrix Standard Reference Materials (SRMs) at the National Institute of Standards and Technology (NIST) can require the use of two or more independent analytical methods. The independence among the methods is generally achieved by taking advantage of differences in extraction, separation, and detection selectivity. This review describes the development of the independent analytical methods approach at NIST, and its implementation in the measurement of organic constituents such as contaminants in environmental materials, nutrients and marker compounds in food and dietary supplement matrices, and health diagnostic and nutritional assessment markers in human serum. The focus of this review is the important and critical role that separation science techniques play in achieving the necessary independence of the analytical steps in the measurement of trace-level organic constituents in natural matrix SRMs.
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11
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Lim YO, Kim B, Ahn S, Kim J. Improvement of accuracy for the determination of vitamin A in infant formula by isotope dilution-liquid chromatography/tandem mass spectrometry. Food Chem 2011. [DOI: 10.1016/j.foodchem.2010.11.118] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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12
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Analysis and evaluation of voluntary folic acid fortification of breakfast cereals in the Spanish market. J Food Compost Anal 2010. [DOI: 10.1016/j.jfca.2010.02.004] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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13
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Huang T, Zhang W, Liu J, Tian Y, Yang G, Quan C. A new certified reference material (GBW10037) of vitamin B3 in infant formula. J Food Compost Anal 2010. [DOI: 10.1016/j.jfca.2009.12.013] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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14
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History of reference materials for food and nutrition metrology: as represented in the series of BERM symposia. Anal Bioanal Chem 2010; 397:413-21. [DOI: 10.1007/s00216-009-3363-y] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2009] [Revised: 11/24/2009] [Accepted: 12/01/2009] [Indexed: 11/26/2022]
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15
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Metrological concepts for enhancing the reliability of food and nutritional measurements. J Food Compost Anal 2007. [DOI: 10.1016/j.jfca.2007.03.005] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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Ashraf-Khorassani M, Ude M, Doane-Weideman T, Tomczak J, Taylor LT. Comparison of gravimetry and hydrolysis/derivatization/gas chromatography-mass spectrometry for quantitative analysis of fat from standard reference infant formula powder using supercritical fluid extraction. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2002; 50:1822-1826. [PMID: 11902918 DOI: 10.1021/jf011389s] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
This paper describes a comparative study of the gravimetric versus hydrolysis/derivatization/gas chromatography-mass spectrometry determination of fat in infant formula. Fat was extracted using supercritical carbon dioxide modified with a small amount of ethanol, the extract was weighed, and the total fat was determined gravimetrically. Subsequently, another sample of the supercritical fluid fat extract was hydrolyzed to yield free fatty acids, which were converted to their methyl ester derivatives (FAMEs). Quantification was performed by GC-MS. NIST Standard Reference Material (SRM-1846) was used to validate both fat determination methods. Results showed that the gravimetric average percent fat was 26.86%, whereas the GC-MS method yielded 24.64%. Some peaks were detected in the ion chromatogram from the GC-MS that were identified as nonfatty acids such as aldehydes, which may account for the higher percentage fat measured as weight of extract rather than measured as FAMEs expressed as triglycerides.
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Affiliation(s)
- M Ashraf-Khorassani
- Department of Chemistry, Virginia Polytechnic Institute and State University, Blacksburg, Virginia 24061, USA
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Lacroix DE, Wolf WR, Hindsley TM. EVALUATION OF NIACIN LC METHODS BY DIODE ARRAY/SPECTRAL ANALYSIS. ANAL LETT 2002. [DOI: 10.1081/al-120015004] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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Ollilainen V, Finglas PM, van den Berg H, de Froidmont-Görtz I. Certification of B-group vitamins (B1, B2, B6, and B12) in four food reference materials. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2001; 49:315-321. [PMID: 11305253 DOI: 10.1021/jf9912497] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
In 1989, the Community Bureau of Reference started a research program to improve the quality of vitamin analysis in food. To achieve this task, vitamin methodology was evaluated and tested by interlaboratory studies and the preparation of certified reference materials, which will be used for quality control of vitamin measurements. The main improvements in methodology were achieved by testing and standardizing the extraction condition and enzymatic hydrolysis procedures. Results for each individual material are derived from five replicate determinations using at least two independent methods: liquid chromatography (HPLC) and microbiological assay for vitamins B1, B2, and B6; and radioprotein binding and microbiological assays for vitamin B12. The certificate of analysis for four reference materials gives mass fraction values for water-soluble vitamins. These certified values were based on the acceptable statistical agreement of results from collaborating laboratories. Certified values with uncertainties (mg/kg dry matter) for each CRM are as follows: 4.63 (0.20) and 4.10 (0.51) for vitamins B1 and B6, respectively, in CRM 121 (wholemeal flour); 6.51 (0.24), 14.54 (0.3), 6.66 (0.43), and 0.034 (0.003) for vitamins B1, B2, B6, and B12, respectively, in CRM 421 (milk powder); 3.07 (0.17) and 4.80 (0.40) for vitamins B1 and B6, respectively, in CRM 485 (lyophilized mixed vegetables), and 8.58 (0.55), 106.8 (2.8), 19.3 1.5), and 1.12 (0.044) for vitamins B1. B2, B6, and B12, respectively, in CRM 487 (lyophilized pig liver).
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Affiliation(s)
- V Ollilainen
- Department of Applied Chemistry and Microbiology, University of Helsinki, Finland.
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Sharpless KE, Margolis S, Thomas JB. Determination of vitamins in food-matrix Standard Reference Materials. J Chromatogr A 2000; 881:171-81. [PMID: 10905701 DOI: 10.1016/s0021-9673(00)00260-0] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
In recent years, the National Institute of Standards and Technology (NIST) has developed several food-matrix Standard Reference Materials (SRMs) characterized for vitamins and other organic nutrients. NIST uses several "modes" for assignment of analyte concentrations in SRMs, one of which includes the use of data provided by collaborating laboratories. Certification modes and liquid chromatographic methods that were used by NIST for value assignment of vitamin concentrations in recently introduced food-matrix SRMs are described in this paper. These materials and methods include vitamins D and E in coconut oil (SRM 1563) by gravimetry and multi-dimensional liquid chromatography (LC); vitamins A, E, and several B vitamins by reversed-phase LC and vitamin C by ion-exchange chromatography in infant formula (SRM 1846); and carotenoids and vitamins A and E by reversed-phase liquid chromatography in a baby food composite (SRM 2383).
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Affiliation(s)
- K E Sharpless
- National Institute of Standards and Technology, Gaithersburg, MD 20899-8392, USA.
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Use of a microbiological assay with tri-enzyme extraction for measurement of pre-fortification levels of folates in enriched cereal-grain products. Food Chem 1998. [DOI: 10.1016/s0308-8146(98)00089-2] [Citation(s) in RCA: 67] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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