Searched for: subject:"Determinants"
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document
Speek, A.J. (author), van Agtmaal, E.J. (author), Saowakontha, S. (author), Schreurs, W.H.P. (author), van Haeringen, N.J. (author), Centraal Instituut voor Voedingsonderzoek TNO (author)
A fast and sensitive high-performance liquid chromatographic (HPLC) method for the determination of vitamin A (all-trans retinol) in 50 ??l human tear fluid is described. After deproteinization with ethanol and extraction with n-hexane, retinol is separated from the extract on a straight-phase HPLC column and detected fluorometrically. Vitamin A...
article 1986
document
Speek, A.J. (author), Wongkham, C. (author), Limratana, N. (author), Saowakontha, S. (author), Schreurs, W.H.P. (author), Instituut CIVO-Toxicologie en voeding TNO (author)
Chemicals/CAS: n,n dimethylacetamide, 127-19-5; retinol, 68-26-8, 82445-97-4; Vitamin A, 11103-57-4
article 1986
document
Speek, A.J. (author), Odink, J. (author), Schrijver, J. (author), Schreurs, W.H.P. (author), Centraal Instituut voor Voedingsonderzoek TNO (author)
A reliable high-performance liquid chromatographic method is presented for the determination of the urinary free catecholamines noradrenaline, adrenaline and dopamine. Urine is purified on a column of immobilized boric acid. Catecholamines are separated by ion-pair reversed phase high-performance liquid chromatography and detected...
article 1983