การเกษตรและเทคโนโลยีชีวภาพ
เอกสารมาตรฐาน
สหรัฐอเมริกา
AOAC
2001.12
Water/Dry Matter (Moisture) in Animal Feed, Grain, and Forage (Plant Tissue): Karl Fischer Titration Methods
2005 (2023)
Final Action
8
AOAC 2023 Online Ch. 4.1.09A
For Method I, water is extracted from the animal feed or forage material into methanol–formamide (1 + 1) directly in the Karl Fischer titration vessel by high-speed homogenization. The formamide content must not exceed 50% to maintain reaction conditions. A subsequent titration of the water is performed at 50°C with one-component Karl Fischer reagent based on imidazole ...