摘要
[目的]建立饲料级磷酸盐中磷的快速测定方法。[方法]采用分光光度法研究了磷酸盐中总磷含量的测定条件，并与国标方法进行比较测定了不同种类饲料级磷酸盐样品。[结果]优化后的测试条件为：测试波长420 nm，显色酸度控制在0．5～1．0 mol／L，显色温度不低于15℃，显色时间20～30 min。方法回收率97．5％～100．1％，比较2种方法测定各样品的结果，均满足标准要求。[结论]采用分光光度法测定饲料级磷酸盐中磷的含量，方法简单、快捷，可以满足标准要求的准确度和精密度。
Abstract
Objective] To establish a method for the rapid determination of the phosphorus in feed-grade phosphate.[Method]The concentration of phosphorus in phosphate was determined by spectrophotometry method .Different types of feed-grade phosphate samples were detected and compared by national standard method.[Result] The optimized detection condition was as follows: 420 nm detection wavelength, 0.5 -1.0 mol/Lchromogenic acidity, color developing temperature greater than 15 ℃, and 20-30 min color developing time.Under this condition, the recovery rate was 97.5%-100.1%.The results of two methods all met the requirement of standard.[Conclusion] Phosphorus content in feed-grade phosphate detected by spectrophotometry method is proved to be easy, rapid and accurate.
国家科技期刊平台
NSTL
维普
万方数据