Materias
(48)
Refinar búsqueda
texto impreso
texto impreso
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[...]
texto impreso
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[...]
texto impreso
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[...]
texto impreso
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.[...]
texto impreso
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[...]
texto impreso
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[...]
texto impreso
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[...]
texto impreso
texto impreso
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[...]
texto impreso
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[...]
texto impreso
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[...]
