重钙及普钙中有效磷的直接提取

Extract available Phosphorus Directly From Granular Triple Superphosphate and Superphosphate

本文研究了用中性柠檬酸铵直接提取重钙及普钙中的有效磷 ,较之现行化工行业标准规定的方法减少用时 2h以上 ,分析结果与标准法结果的绝对差值小于 0 .1 0 %。

The paper report discussess the method in which extract directly available phosphorus from granular triple superphosphate and superphosphate with neutral ammonium citric acid.It can make operating time shorten 2 h compared with the standard methods adopted presently in chemical industry.In analytic result,the error between this method and the standard methods is less than 0.10 %.