Calcium salt, a hydroxy analogue of methionine, appears as a light gray granular powder and is a feed with the same biological potency as methionine. In addition to being a precursor of methionine, it can also alleviate the effects of heat stress on animals and provide additional Ca+, thereby reducing the amount of calcium carbonate in the diet and providing extra space to increase the content of other nutrients in the feed formula. So it is very important to determine its content. This article refers to the methods in the national standard and conducts experiments using a potentiometric titrator, obtaining good data.

2 Instruments and reagents

instrument

GT90 fully automatic potentiometric titrator

10mL burette unit,

Platinum composite electrode.