工业氨基乙酸含量测定指示剂选择的探讨

Study on electing indicator of determining content of lndustril Glycine

工业氨基乙酸含量测定以结晶紫为指示剂 ,终点颜色变化不明显 ,终点难以判断 ,误差很大 ,改为α一萘酚苯甲醇为指示剂 ,终点变化明显。而且相对误差小。

The content of industril glycine was determined with crystallizing alkannin as indicator in past,which had the weakness of no clwarend point,larger error.In present,the α-naphthol-benzoic-alcohol has been used as indicator,the weakness above were avoided