The determination of carotene and vitamin A in butter and margarine
- 1 January 1946
- journal article
- research article
- Published by Royal Society of Chemistry (RSC) in The Analyst
- Vol. 71 (838), 15-20
- https://doi.org/10.1039/an9467100015
Abstract
The difficulties inherent in the chemical assay of total vit. A activity in margarine are discussed and illustrated by several examples. Detn. of [image]. at 325 m[mu] is useless owing to irrelevant absorption and with SbCl3 at 620 m[mu] is complicated by production of color from other constituents than vit. A. The latter can be approx. detd., after the vit. blue has faded, and subtracted from the total blue (Edisbury''s method). The reasonableness of this procedure was supported by recovery and by biologic tests.Keywords
This publication has 3 references indexed in Scilit:
- A photoelectric photometer for the estimation of vitamin A in margarineThe Analyst, 1946
- A modified spectrophotometric method for the assay of carotene and vitamin A in butterBiochemical Journal, 1934
- Variations in the quality of butter, particularly in relation to the vitamin A, carotene and xanthophyll content as influenced by feeding artificially dried grass to stall-fed cattleBiochemical Journal, 1933