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A method was devised to assay four forms of vitamin C: L-ascorbic acid (AA), dehydroascorbic acid (DHA), ascorbate-2-mono- and polyphosphate (AMP, APP), as well as ascorbate-2-monosulphate (AMS), in sample series of different fish tissues and fe[...]
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Naturally occurring folates exist in multiple forms, differing in pteridine ring structure and number of glutamate residues. The ability to measure these folate coenzymes in tissues and cells gives important information about in vivo folate meta[...]
documento electrónico
T. RAJASEKARAN, Autor ; A. RAMAKRISHNA, Autor ; K. UDAYA SANKAR, Autor ; P. GIRIDHAR, Autor ; G. A. RAVISHANKAR, Autor | 2008Stevia reabudiana is gaining popularity especially in making diabetic food supplements in view of its non-nutritive glycosides. Steviosides profile in ex vitro and in vitro leaves and callus cultures of S. rebaudiana were investigated by HPLC an[...]
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In this study several properties of acetonitrile-water (ACN-water) mixtures were examined which have an influence on the liquid chromatography (LC) behavior of ionizable compounds, such as Debye-Hückel parameters, pH scale, LC-useful pH range an[...]
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documento electrónico
Article : documento electrónico
JACQUES PRODOLLIET, Autor ; MILENE BRUELHART, Autor |A liquid chromatographic method was evaluated for the determination of the intense sweetener acesulfam-K in tabletop sweetener, candy, soft drink, fruit juice, fruit nectar, yogurt, cream, custard, chocolate, and biscuit commercial preparations.[...]
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ISABELLE SCHMITZ-AFONSO, Autor ; JORGE E. LOYO-ROSALES, Autor ; MARIA DE LA PAZ AVILES, Autor ; BARNETT A. RATTNER, Autor ; CLIFFORD P. RICE, Autor | 2003A quantitative method for the simultaneous determination of octylphenol, nonylphenol and the corresponding ethoxylates (1 to 5) in biota is presented. Extraction methods were developed for egg and fish matrices based on accelerated solvent ext[...]
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A high-performance liquid chromatographic method has been developed for determination of ascorbic and dehydroascorbic acid. Samples were extracted with 62.5 mM metaphosphoric acid and ascorbic acid determined using an ion-exclusion column with d[...]
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A rapid and simple method using reversed-phase high-performance liquid chromatography combined with indirect visible photometry at 433 nm was developed to determine cyclamate in some food samples. Cyclamate was not detected in these chosen sampl[...]
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A simple method for the determination of glucosamine and lactose in milk-based formulae by high-performance liquid chromatography (HPLC) with refractive index detector was developed and validated. Samples were cleaned up just by protein precipit[...]
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HPLC methods described so far for the determination of thiamine and riboflavin in meat samples have used mostly fluorescence detection. The aim of this work was to elaborate a suitable method with UV detection for this purpose and to compare the[...]
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Liquid chromatographic methodology for determination of vitamin C and organic acids in different fruits (whortleberry, blackberry, red currant, black currant, raspberry, babaco, feijoa, kiwano, passion fruit, red and yellow tamarillos, medlar, a[...]
documento electrónico
ADRIENNE McMAHON, Autor ; S. CHRISTIANSEN, Colaborador ; F.-F. CHEE, Colaborador ; A. CHUA, Colaborador ; H. BRADDOCK, Colaborador ; B. GILL, Colaborador ; RAQUEL DE GUZMAN, Colaborador ; K. KOHLER, Colaborador ; D.P. LABITAN, Colaborador ; J. LE GRANDOIS, Colaborador ; E. MARCEAU, Colaborador ; F. MARTIN, Colaborador ; S. MENG JENSEN, Colaborador ; L. MEYER, Colaborador ; D. PIOT, Colaborador ; L. RAEL, Colaborador ; KAREN SCHIMPF, Colaborador ; M. THOMPSON, Colaborador ; TORRES, MARINA, Colaborador | 2016The main objective of the AOAC Stakeholder Panel on Infant Formula and Adult Nutritionals (SPIFAN) project is to establish international consensus methods for infant formula and adult nutritionals, which will benefit intermarket supply and dispu[...]
documento electrónico
TORRES, MARINA ; BALDIGA, NATALIA ; AMUEDO, VIVIANA ; TORRE, ALEJANDRA | Montevideo [URUGUAY] : Laboratorio Tecnológico del Uruguay (LATU) | 2008La Fortificación de alimentos es muy común en estos días. Nuestro país está alineado con esta tendencia y está desarrollando muchos productos nuevos fortificados. Uno de esos productos son las galletitas fortificadas. Nosotros trabajamos en un m[...]
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The influence of coexisting fat on the extraction of tocopherols (Toc) and tocol, as an internal standard, with n-hexane after saponification was studied.
documento electrónico
LUKAS TAUJENIS, Autor ; VILMA OLSAUSKAITE, Autor ; AUDRIUS PADARAUSKAS, Autor | 2014
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NDAW, S., Autor ; AOUDÉ-WERNER, D. , Autor ; BERGAENTZLE, M., Autor ; HASSELMANN, C., AutorTreatment with a mixture of enzymes (a-amylase, papain and acid phosphatase) led to the release in a single step of the different forms (phosphorylated and protein-bound) of the vitamins B1, B2 and B6 present in various food samples, not supplem[...]
Article : documento electrónico
SAMY H. ASHOOR, Autor ; GEORGE J. SEPERICH, Autor ; WOODROW C. MONTE, Autor ; JIM WELTY, Autor |A method was developed for determining caffeine in decaffeinated coffee, tea, and beverage products by high performance liquid chromatography (HPLC). The HPLC system consisted of a Bio-Sil ODS-5S C18 column, methanol-water (25 + 75) mobile phase[...]
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A high performance liquid chromatography (HPLC) method has many advantages when compared with conventional methods for analysis of lactose in milk.
documento electrónico
M.MÍGUEZ BERNÁRDEZA, Autor ; J DE LA MONTAÑA MIGUÉLEZ, Autor ; J. GARCIA QUEIJEIRO, AutorThe major components in chestnut (Castanea sativa Mill) are carbohydrates, mainly starch, followed by sucrose. This disaccharide is one of the most important parameters for the assessment of the commercial quality of these fruits. In this study [...]
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Taurine (2-aminoethanesulfonic acid) is a conditionally essential amino acid. While it can be synthesized by healthy adults from methionine and cysteine and it can be absorbed from foods (generally skeletal muscle) that contain it, preterm infan[...]
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The amino acid taurine (2-aminoethanesulfonic acid) is present in many sports drinks claiming to provide you with some special advantage. While taurine is not incorporated into proteins, our bodies contain a good amount (approximately 70 g in a [...]
