Zobrazeno 1 - 10
of 17
pro vyhledávání: '"M. M. Delgado Zamarreño"'
Publikováno v:
Analytica Chimica Acta. 386:99-106
An automated procedure for the determination of vitamin E in samples of butter with minimum sample manipulation has been developed. Following dissolution of the samples in a micellar medium (methanol–Triton X-100–water), on-line sample treatment
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::9bdfc684264c28afa1377a0cd11dff2f
https://doi.org/10.1016/s0003-2670(99)00014-8
https://doi.org/10.1016/s0003-2670(99)00014-8
Publikováno v:
The Analyst. 120:139-142
Casein greatly reduces the overvoltage for the polarographic reduction of NiII in sodium acetate medium. Using polarographic chronoamperometry, current–time curves were obtained from which the electrocatalytic effect of casein could be evaluated. T
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::50c780dafff09456ffbda4efb2ab6c0f
https://doi.org/10.1039/an9952000139
https://doi.org/10.1039/an9952000139
Autor:
J. Hernandez Mendez, A. Sanchez Perez, M. C. Gomez Perez, M. A. Fernandez Moro, M. M. Delgado Zamarreño
Publikováno v:
The Analyst. 120:2489-2492
A high-performance liquid chromatographic method with dual-electrochemical detection (HPLC-DEC) for the simultaneous determination of vitamins A, E and K1 is described. Separation was carried out using a C18 reversed-phase column and 2.5 mmol l-1 ace
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ac2b53b70137f2d8f712d225a20fd0a5
https://doi.org/10.1039/an9952002489
https://doi.org/10.1039/an9952002489
Publikováno v:
Analytical Letters. 26:2565-2573
The electrochemical behaviour of vitamin D3 and 25-hydroxyvitamin D3 (25-OH D3) in a high performance liquid chromatography system using amperometric detection is described. Separation is carried out using a C18 reversed-phase column and the optimum
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::6d24f175e30bbf46846f46b84f164b4b
https://doi.org/10.1080/00032719308017974
https://doi.org/10.1080/00032719308017974
Publikováno v:
Journal of chromatography. A. 871(1-2)
Capillary electrokinetic chromatography is suitable for the separation of mixtures of uncharged and charged solutes. In the present work the behavior of six synthetic food antioxidants--2[3]-tert.-butyl-4-hydroxyanisole, 2,6-di-tert.-butyl-p-cresol,
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=pmid________::cf4299513e8d0b4148f98384ff82dcc9
https://pubmed.ncbi.nlm.nih.gov/10735321
https://pubmed.ncbi.nlm.nih.gov/10735321
Autor:
J. Hernández Méndez, M. Sanchez Rodriguez, A. Sanchez Perez, M. C. Gomez Perez, M. M. Delgado Zamarreño
Publikováno v:
Talanta. 43(9)
A method employing HPLC with electrochemical detection for the rapid and simultaneous determination of vitamins A, D3 and E is described. The method uses a C-18 reverse phase column and 2.5 mM HAcO-NaAcO in methanol-water (99:1, v/v) solution as the
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::7bc17e230c90137c57cbedac49baf6f2
https://pubmed.ncbi.nlm.nih.gov/18966636
https://pubmed.ncbi.nlm.nih.gov/18966636
Publikováno v:
Journal of chromatography. 623(1)
A high-performance liquid chromatographic electrochemical detection for the rapid and simultaneous determination of the vitamin A, D3 and E is described. The separation is carried out by using a C18 reversed-phase column and 0.1 M LiClO4 in methanol-
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::a5d0935da521cb2368929c41987f9b26
https://pubmed.ncbi.nlm.nih.gov/1333471
https://pubmed.ncbi.nlm.nih.gov/1333471
Publikováno v:
Journal of Pharmaceutical and Biomedical Analysis. 7:1213-1216
The present paper described the voltammetric behaviour of 25-OH D 3 as a means for determining the substance at low concentrations. The new method may be applied to the electroanalytical determination of 25-OH D 3 in samples of pharmaceutical interes
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::7341cf5962cb521fd39f2dca86e4aa2e
https://doi.org/10.1016/0731-7085(89)80057-3
https://doi.org/10.1016/0731-7085(89)80057-3
Publikováno v:
Analytica Chimica Acta. 160:335-340
A nickel-catalytic pre-peak at −0.72 V vs. Ag/AgCl, is caused by cephalexin in sodium acetate (pH 8.3) medium. It is used to determine 2.4 × 10−7–6 × 10−6 M cephalexin; the relative standard deviation is 4% for 0.88 μg ml−1 cephalexin. O
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::5ea93b8ff9c63deba79b68ed58f3a34d
https://doi.org/10.1016/s0003-2670(00)84541-9
https://doi.org/10.1016/s0003-2670(00)84541-9
Publikováno v:
Analytica Chimica Acta. 176:279-284
In the polarographic reduction of ranitidine, an H2-antagonist of histamine, three waves are observed; their half-wave potentials and limiting currents depend strongly on the pH of the solution. The first and second waves are due to reduction of teh
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::fee0716e4d7dba1b363c6dc3044838bd
https://doi.org/10.1016/s0003-2670(00)81656-6
https://doi.org/10.1016/s0003-2670(00)81656-6