Vitamin A in Milk - Microestimation with Activated 1,3-Dichloro-2-propanol

Abstract

Activated l,3-dichIoro-2-propanol (glycerol , -dichlorohydrin) has been ap-Reference Method New Method Sample Vol. used Ml.

Light Absorption Spectrometry

“…For various organic materials the procedures include the Fehling solution method for sugars (112), the decolorization of the iron-ferron complex for oxalate (24), the use of Schiff's reagent for determining formaldehyde and acetaldehyde (208), or for determining formaldehyde and 2-furylaldehyde (207) when present together; the use of l,3-dichloro-2-propanol for vitamin A in milk (187) and in whale oil (19), and an absorbancy-ratio method (at 480 and 555 µ) for carbon monoxide in blood (107). Clarke (29) improved the mercuric nitrate-diphenylcarbazone method for chloride in water.…”

Reactions of Activated Glycerol Dichlorohydrin with Vitamin A

“…pressure; this reagent was recommended for analytical purposes (13)(14)(15). Such material has been used for the determination of vitamin A in dairycalf blood plasma (1, 8, 30), cow blood plasma (17,18), rat blood serum (12), rat liver and kidney (7), human blood serum (13), fish liver oils (2, 3, 14), cows' milk (18), human milk (11), and fortified poultry mashes (19).…”