饲料级磷酸盐中磷含量的快速测定方法研究  

Rapid Analysis Method of Phosphorus Content in Feed-grade Phosphate

作　　者：李优琴[1,2] 吕康[1,2] 周维仁[3] 陈小龙[1,2] 

机构地区：[1]江苏省农业科学院食品质量安全与检测研究所,江苏南京210014 [2]江苏省省部共建食品质量安全重点实验室,江苏南京210014 [3]江苏省农业科学院畜牧研究所,江苏南京210014

出　　处：《安徽农业科学》2016年第32期100-101,105,共3页Journal of Anhui Agricultural Sciences

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。[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. 0mol / 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 feedgrade phosphate detected by spectrophotometry method is proved to be easy,rapid and accurate.

关 键 词：饲料级磷酸盐 磷 分光光度法 

分 类 号：S816.11[农业科学—饲料科学]