Vitamin A, Analytical Methods 



Preliminary report on a drill sampling device for fish livers. Sep 66 



Some time and labor saving technitjues in vitamin A and oil analyses. 

 Sep 72 



Preliminary report on sampling of fish livers. Sep 87 



Distribution of oil and vitamin A in fish livers. Sep 88 



Monograph for the determination of liver potency. Sep 93 



How oil and vitamin A are determined in fish livers. Sep 97 



A rapid method for determining the vitamin A potency of fish livers. 

 Sep 100 



Effect of fish liver freshness on E value ratios of resulting oil. 

 Sep 103 



A rapid test for vitamin A stability. Sep 129 



A sampler for livers frozen in drums. Sep 153 



Preliminary procedures for the analysis of vitamin A in fishery byprod- 

 ucts . Sep 163 



Estimations of extinction ratios and vitamin A potency of 12 reduction 

 plant oils . Sep 180 



Ultraviolet absorption curves for vitamin A using tungsten and hydrogen 

 discharge light sources . Sep I83 



Studies on methods of extracting vitamin A and oil from fishery products, 

 Part I. Sep I86 



Studies on methods of extracting vitamin A and oil from fishery products. 

 Part II - Experiments on the solvent extraction of low- fat livers. 

 Sep 22^4- 



E value ratios for some commercial vitamin A oils . Sep 226 



E value ratios for grayfish, soupfin shark, sablefish and halibut liver 

 oils produced in the Pacific Northwest. Sep 237 



Studies on methods of extracting vitamin A and oil from fishery products. 

 Part III - Experiments on the extraction of low-oil-content livers with 

 petroleum ether by the shaking method. Sep 25^ 



227 



