Effect of Test Portion Mass on Vitamin A Testing in Animal Feed Materials.

ABSTRACT:

Background

Vitamin A test results have historically been notorious for poor repeatability and reproducibility. This problem has been discussed at length in Association of American Feed Control Officials Laboratory Methods and Services Committee meetings.

Objective

The objective of this work was to assess the effect of test portion mass on the repeatability of vitamin A test results.

Methods

The study was conducted in two parts. In Part I, fundamental sampling error (FSE) was determined experimentally through replicated (n = 16) vitamin A testing of three animal feed materials. The testing followed rigorous test portion selection for 10 g and 100 g test portions. In Part II, FSE calculations were made (1) using theoretical equations based on vitamin A as a liberated an

SUBMITTER: Inerowicz HD 

PROVIDER: S-EPMC8824796 | biostudies-literature | 2022 Feb

REPOSITORIES: biostudies-literature