Colorimetric Standard for Carotene

Abstract

1197to only slightly elongated spots, it promises to lend itself to quantitative examination by a densitometer.At the present stage of its development, two-dimensional circular chromatography can hardly compete with the conventional two-dimensional chromatography. However, it is hoped that the findings reported here may lead to further improvements in this technique.

Pharmaceuticals

“…The conversion of vitamin A to anhydrovitamin A in benzene provides a highly specific method for the determination of this vitamin (92). A solution of /3-carotene in mineral oil has been proposed as a standard for carotene analysis (509). A rapid procedure for the determination of thiamine with diazotized 6-aminothymol is described by Hayden (249).…”