应用全自动间断化学分析仪测定婴幼儿配方乳粉中的磷含量  

Determination of Phosphorus content in Infant Formula Milk Powder by Automatic Discrete Analyzer Cleverchem

作　　者：郑燕燕[1] 李锦才[1] 蔡楚勇 李华丽 Zheng Yanyan;Li Jincai;Cai Chuyong;Li Huali(Shenzhen Academy of Metrology&Quality Inspection,National Nutrition Food Testing Center(Guangdong),Shenzhen 518131,China)

机构地区：[1]深圳市计量质量检测研究院,国家营养食品质量监督检验中心(广东),广东深圳518131

出　　处：《广东化工》2021年第14期243-244,231,共3页Guangdong Chemical Industry

摘　　要：目的:建立全自动间断化学分析仪法测定婴幼儿配方乳粉中的磷含量。方法:采用湿法消解样品,以钒钼酸铵作为显色剂,通过全自动间断化学分析仪(λ=420 nm)自动测定磷含量。结果:磷含量浓度在1.50~15.0 mg/L范围内呈良好线性关系(r=0.9999);低、中、高3个浓度的平均回收率分别为89.8%、93.9%、98.4%;精密度(RSD)分别为1.4%、2.4%;本方法与国标方法的检测结果一致。结论:本方法操作简单、试剂用量少,可用于婴幼儿配方乳粉中磷含量的测定。Objective: To establish a method for determination of phosphorus content in infant formula milk powder by Automatic Discrete Analyzer Cleverchem. Methods: The samples were treated by acid digestion, color development with vanadium ammonium molybdate as color developer. The content of phosphorus was determined by Automatic Discrete Analyzer Cleverchem(λ=420 nm). Results: Phosphorus had a good linear relationship in the range of 1.50~15.0 mg/L. The average recoveries of low, medium and high concentrations were 89.8 %, 93.9 %, 98.4 %, respectively. The relative standard deviation(RSD) were 1.4 % and 2.4 %. The results of this method and the national standard method were consistent. Conclusion: This method is simple, less reagent dosage, which can be used for determining the content of phosphorus in infant formula milk powder.

关 键 词：磷含量 全自动间断化学分析仪 婴幼儿配方乳粉 分光光度法 钒钼酸铵 

分 类 号：TQ[化学工程]