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Pesqueira M, Yus E, Factor C, Mato I, Sanjuán M, Eiras C, Arnaiz I, Diéguez F. Short communication: Correlation between within-herd antibody-prevalence and bulk tank milk antibody levels to Mycobacterium avium ssp. paratuberculosis using 2 commercial immunoassays. J Dairy Sci 2017; 100:7544-7548. [DOI: 10.3168/jds.2017-12706] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2017] [Accepted: 05/24/2017] [Indexed: 11/19/2022]
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Mato I, Pesqueira N, Factor C, Sanjuan M, Yus E, Fouz R, Arnaiz I, Camino F, Diéguez F. Effect of Mycobacterium avium subsp. paratuberculosis infection status on culling and calving difficulty in dairy cattle. Livest Sci 2015. [DOI: 10.1016/j.livsci.2015.04.015] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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Affiliation(s)
- Inés Mato
- a Facultad de Farmacia, Departamento de Química Analítica, Nutrición y Bromatología, Área de Nutrición y Bromatología , Universidad de Santiago , Galicia , Spain
| | - José F. Huidobro
- a Facultad de Farmacia, Departamento de Química Analítica, Nutrición y Bromatología, Área de Nutrición y Bromatología , Universidad de Santiago , Galicia , Spain
| | - Jesús Simal-Lozano
- a Facultad de Farmacia, Departamento de Química Analítica, Nutrición y Bromatología, Área de Nutrición y Bromatología , Universidad de Santiago , Galicia , Spain
| | - M. Teresa Sancho
- b Facultad de Ciencias, Departamento de Biotecnología y Ciencia de los Alimentos, Área de Nutrición y Bromatología , Universidad de Burgos , Burgos , Castilla y León , Spain
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Suarez-Luque S, Mato I, Huidobro JF, Simal-Lozano J, Sancho MT. Capillary zone electrophoresis method for the determination of inorganic anions and formic acid in honey. J Agric Food Chem 2006; 54:9292-6. [PMID: 17147409 DOI: 10.1021/jf061536s] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/12/2023]
Abstract
A capillary zone electrophoresis method for the determination of inorganic anions and formic acid in honey samples was developed for the first time. The complete separation of chloride, nitrate, sulfate, phosphate, and formic acid was achieved with a simple electrolyte composed by 2 mM potassium dichromate as the carrier solution and background absorbance provider and 0.05 mM tetraethylenepentamine (TEPA) as electro-osmotic flow suppressor (pH 4.00). Injection was performed hydrostatically by elevating the sample at 10 cm for 10 s. The running voltage was -27 kV at 25 degrees C. Indirect UV absorption detection was achieved at 254 nm. The detection limit was in the range between 0.03 and 20 mg/kg, and the quantification limits ranged from 1.52 to 20.6 mg/kg. The calibration graphs were linear in the concentration range from the quantification limit to at least 2.5 g/kg for chloride, 0.25 g/kg for nitrate, 0.75 g/kg for sulfate, 1.50 g/kg for phosphate, and 0.75 g/kg for formic acid. Precision data in the honey samples analyzed showed repeatability and reproducibility relative standard deviations lower than 1.4 and 2.4% for migration time and lower than 1.8 and 4.3% for anion content, respectively. Recoveries of anions in honey samples analyzed ranged from 94.4 to 99.8%. Ten honey samples were analyzed to test the proposed method. Mean contents of 260.5, 3.93, 60.5, 139.4, and 209.3 mg/kg were found, respectively, for chloride, nitrate, sulfate, phosphate, and formic acid in analyzed honeys. These results agreed with literature data.
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Affiliation(s)
- Silvia Suarez-Luque
- Facultad de Farmacia, Departamento de Química Analítica, Nutrición y Bromatología, Area de Nutrición y Bromatología, Universidad de Santiago, 15782 Santiago de Compostela, Galicia, Spain
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Mato I, Huidobro JF, Simal-Lozano J, Sancho MT. Simultaneous determination of organic acids in beverages by capillary zone electrophoresis. Anal Chim Acta 2006. [DOI: 10.1016/j.aca.2006.02.043] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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Mato I, Huidobro JF, Simal-Lozano J, Sancho MT. Rapid determination of nonaromatic organic acids in honey by capillary zone electrophoresis with direct ultraviolet detection. J Agric Food Chem 2006; 54:1541-50. [PMID: 16506798 DOI: 10.1021/jf051757i] [Citation(s) in RCA: 42] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/06/2023]
Abstract
A rapid capillary zone electrophoresis (CZE) method with direct ultraviolet (UV) detection has been set up and developed to determine the most important nonaromatic organic acids in honey with a really simple treatment of the sample. The determination of oxalic, formic, malic, succinic, pyruvic, acetic, lactic, citric, and gluconic acids has been carried out in 4 min. The electrolyte composition was phosphate as the carrier buffer (7.5 mM NaH(2)PO(4) and 2.5 mM Na(2)HPO(4)), 2.5 mM tetradecyltrimethylammonium hydroxide (TTAOH) as electroosmotic flow modifier, and 0.24 mM CaCl(2) as selectivity modifier, with the pH adjusted at 6.40 constant value. The running voltage was -25 kV at a thermostated temperature of 25 degrees C. The injections were performed in hydrodynamic mode (30 s), and the detection mode was UV direct at 185 nm. Validation parameters of the method as detection and quantification limits, linearity, precision (repeatability and reproducibility), and recovery were also studied. The advantages related to the technique such as simplicity, short analysis times, and low consumption of chemicals as well as the good validation parameters obtained for this method permit it to be considered as adequate for routine analysis in honey.
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Affiliation(s)
- Inés Mato
- Facultad de Farmacia, Departamento de Química Analítica, Nutrición y Bromatología, Area de Nutrición y Bromatología, Universidad de Santiago, 15782 Santiago de Compostela, Galicia, Spain
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Abstract
A capillary electrophoresis system for the simultaneous determination of cations in honey samples has been developed. The complete separation and quantification of K+, Ca2+, Na+, Mg2+, Mn2+, Ni2+ and Li+, which represent more than 99% of the total content of cations in honey, can be achieved in 4 min with only a dilution and filtration of the honey sample. Electrolyte solution was composed by 10 mM imidazole as the carrier buffer and background absorbance provider and acetic acid as the complexing agent (pH 3.60). The running voltage was + 25 kV at 25 degree C. Indirect UV detection was achieved at 185 nm. Under the optimum conditions the detection limits ranged from 0.02 to 48.2 mg/kg and the quantification limits have ranged from 0.41 to 48.7 mg/kg. Precision data in honey samples analysed have shown repeatability and reproducibility RSD (%) lower than 2.84 and 6.62%, respectively. Recoveries of cations in honey samples analysed have ranged from 88.5 to 101.8%. These cations were identified by their relative migration times with regard to Ba2+ migration time used as reference standard and they were quantified by using an external standard calibration. Twenty-five honey samples were analysed to test the proposed method. Mean contents of 1.22 x 10(3), 93, 85, 54, 11, 1.9 and 2.3 mg/kg were found, respectively, for K+, Ca2+, Na+, Mg2+, Mn2+, Ni2+ and Li+ cations in analysed honeys. These results were similar than the obtained by other authors.
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Affiliation(s)
- Silvia Suárez-Luque
- Facultad de Farmacia, Departamento de Química Analítica, Nutrición y Bromatología, Area de Nutrición y Bromatología, Universidad de Santiago, 15782 Santiago de Compostela (Galicia), Spain
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Abstract
Although organic acids represent < 0.5% of honey's constituents, they make important contributions to the organoleptic, physical, and chemical properties of honey. To date, approximately 30 nonaromatic organic acids have been identified in honey, but relatively little attention has been paid to these components. This article reviews the current literature related to the significance of nonaromatic organic acids in honey; it was written with a goal of attracting researchers to study these interesting honey components. Previous research contributions on nonaromatic organic acids in honey may be classified into five main areas: (i) the antibacterial activities of these acids, (ii) the antioxidant activities of these acids, (iii) the use of these acids as possible indicators of incipient fermentation, (iv) the use of these acids for treatment of Varroa infestation, and (v) the use of these acids as factors for the characterization of both botanical and geographical origins of honeys. We conclude that nonaromatic organic acids are of interest for diverse reasons and that there is a particular need for studies regarding their possible antibacterial and antioxidant activities.
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Affiliation(s)
- Inés Mato
- Facultad de Farmacia, Departamento de Química Analítica, Nutrición y Bromatología, Area de Nutrición y Bromatología, Universidad de Santiago, 15782 Santiago de Compostela, Galicia, Spain
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Suárez-Luque S, Mato I, Huidobro JF, Simal-Lozano J, Sancho MT. Rapid determination of minority organic acids in honey by high-performance liquid chromatography. J Chromatogr A 2002; 955:207-14. [PMID: 12075924 DOI: 10.1016/s0021-9673(02)00248-0] [Citation(s) in RCA: 79] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
A rapid high-performance liquid chromatographic method for the determination of organic acids in honey is reported. Malic, maleic, citric, succinic and fumaric acids were identified and quantified in 15 min. First time repeatibility, reproducibility and recoveries were determined out for these acids in honey samples. Maleic acid was also quantified for first time by a chromatographic method. The organic acids were removed from honey by using a solid-phase extraction procedure with anion-exchange cartridges. Previously, the solution of honey was adjusted to pH 10.50 with 0.1 M NaOH and stirred for 15 min at room temperature. Then, this solution was adjusted to pH 5.00 with 0.1 M H2SO4. This procedure was carried out to avoid interferences in the baseline. The chromatographic separation was achieved with only one Spherisorb ODS-2 S5 column thermostated at 25 degrees C. Metaphosphoric acid (pH 2.20) was used as mobile phase at a flow-rate of 0.7 ml/min. Organic acids were detected with a UV-vis detector (215 nm). The precision results showed that the relative standard deviations of the repeatability and reproducibility were < or =3.20% and < or =4.86%, respectively. The recoveries of the organic acids ranged from 62.9 to 99.4%. Under optimum conditions the detection limits ranged from 0.0064 to 7.57 mg/kg and the quantification limits ranged from 0.025 to 10.93 mg/kg.
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Affiliation(s)
- Silvia Suárez-Luque
- Facultad de Farmacia, Departamento de Química Analítica, Nutrición y Bromatología, Universidad de Santiago, Santiago de Compostela (Galicia), Spain.
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Suárez-Luque S, Mato I, Huidobro JF, Simal-Lozano J. Solid-phase extraction procedure to remove organic acids from honey. J Chromatogr B Analyt Technol Biomed Life Sci 2002; 770:77-82. [PMID: 12013247 DOI: 10.1016/s1570-0232(01)00583-9] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
A solid-phase extraction procedure was applied to remove organic acids from honey. Malic, maleic, citric, succinic and fumaric acids were isolated with an anion-exchange cartridge. The different parameters which affected the extraction procedure were studied and optimised to establish the optimal conditions for maximum recovery of organic acids and minimum extraction of interferences. The optimised procedure used a cartridge which was activated with 10 ml of 0.1 M sodium hydroxide solution (percolation rate 3 ml/min). A 10 ml volume of honey solution was passed at a flow-rate of 0.5 ml/min. The cartridge was washed with 10 ml of water (3 ml/min) and organic acids were eluted with 4 ml of 0.1 M sulfuric acid (0.5 ml/min). This solution was injected directly into the chromatograph. When this procedure was carried out on standard solutions of organic acids, recoveries between 99.2 and 103.4% were found. If this procedure was applied to honey samples these recoveries were also satisfactory and ranged from 62.9 to 99.4%.
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Affiliation(s)
- Silvia Suárez-Luque
- Facultad de Farmacia, Departamento de Química Analítica, Nutrición y Bromatología, Universidad de Santiago, Santiago de Compostela, Galicia, Spain
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Huidobro JF, Rea ME, Mato I, Muniategui S, Fernández-Muiño MA, Sancho M. Variation of apparent ethanol content of unspoiled northwestern Spanish honeys during storage. Food Chem 2001. [DOI: 10.1016/s0308-8146(00)00316-2] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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Abstract
Invertase activity is a good parameter for evaluating honey freshness. Invertase activity evolution was determined on 57 fresh, unheated, commercially purchased Galician (northwestern Spain) floral honey samples. All honeys were stored in darkness at room temperature for up 24 months and analyzed each 6 months so as to determine the invertase activity evolution tendency for the first time. Invertase activity analysis was carried out according to Siegenthaler's method and in a simple assay, the latter showing a good precision (coefficient of variation between 0.35 and 0.66%). Initial invertase activity mean value was 163.9 (48.4-251.0) micromol of 4-nitrophenyl-alpha-D-glucopyranoside hydrolyzed/kg of honey/min. After application of the SPSS statistical package, the values of invertase activity showed five types of temporal behavior: exponential (56% of samples), linear (25% of samples), logarithmic (11% of samples), inverse (5% of samples), and quadratic (3% of samples). Linear regression equations were used to predict the invertase activity at 6, 12, 18, and 24 months from the initial Galician honeys' invertase activities; no statistical differences were found between experimental data and the activities calculated from the linear regression equations.
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Affiliation(s)
- M P Sánchez
- Facultad de Farmacia, Area de Nutrición y Bromatología, Universidad de Santiago, 15706 Santiago de Compostela (Galicia), Spain
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Mato I, Huidobro JF, Cendón V, Muniategui S, Fernández-Muiño MA, Sancho MT. Enzymatic Determination of Citric Acid in Honey by Using Polyvinylpolypyrrolidone Clarification. J Agric Food Chem 1998; 46:141-144. [PMID: 10554209 DOI: 10.1021/jf970418p] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
To characterize honey types, a citric acid determination may be useful. A citric acid determination on honey was carried out with previous polyvinylpolypyrrolidone (PVPP) clarification followed by the Boehringer-Mannheim GmbH enzymatic test. The sample solution was prepared from 2 g of honey in 100 mL of Milli-Q water. A volume of 10 mL of this sample was clarified with PVPP stirring for 1 min and filtered. The enzymatic determination was measured spectrophotometrically at 340 nm, using citrate lyase, L-malate dehydrogenase, and L-lactate dehydrogenase. With these conditions, there were no observed interference effects. The proposed method improves precision [coefficient of variation (CV) between 0.26% and 1.60%] and recovery (between 98.0% and 100.9%) on the direct enzymatic analysis (% CV between 1.02 and 2.66 and recovery between 84.0% and 115.6%). Furthermore, the cost was reduced 70% using a microtest. The method was applied to 20 honeys of Galicia (northwestern Spain), and the results ranged between 44.2 and 827.0 mg of citric acid/kg of honey (mean = 192.9 mg/kg).
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Affiliation(s)
- I Mato
- Facultad de Farmacia, Área de Nutrición y Bromatología, Universidad de Santiago, Campus Universitario Sur, 15706 Santiago de Compostela (Galicia), Spain; Facultad de Ciencias, Área de Química Analítica, Universidad de La Coruña, Campus de la Zapateira s/n, 15071 La Coruña (Galicia), Spain; and Facultad de Ciencia y Tecnología de los Alimentos, Área de Nutrición y Bromatología, Universidad de Burgos, Plaza de Misael Bañuelos s/n, 09001 Burgos (Castilla y León), Spain
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