在线消解-流动注射测定牛奶中总磷

Online digestion method for the determination of the total phosphorus in milk by flow injection analysis

建立测定牛奶中总磷的在线消解-流动注射的方法。采用全自动流动注射分析仪，对牛奶中的总磷进行测定，在最佳条件下，方法在0．1-10mg／L的质量浓度范围内具有良好线性（r=0．9994），方法的检出限为0．1mg／L，精密度试验相对标准偏差（RSD）为1．33％1．99％，平均回收率为94．0%-101．1％，与国标方法中钼酸铵分光光度法比较，无明显差异，且具有灵敏度高、重复性好等优点，实现了自动的在线消解代替了传统较为繁琐的消化方式，检测过程容易实现自动化，提高了检测效率。

Setting up an online digestion method for the Determination of the total phosphorus in milk by Flow Injection Analysist. The au- tomatic flow injection analyzer for the determination of total phosphorus in milk. Under the optimum conditions, the methods in 0.1-10mg/ L concentration range with good linearity （r=0.9994）, method detection limit 0.1 mg/L, precision test relative standard deviation （KSD） for 1.36%-1.99%, average recovery rate for 94.0%-101.1% and ammonium molybdate method and national standard points spectrophotometric method compared, no significant difference, and has the advantages of high sensitivity and good repeatability, realize the automatic on-line di- gestion instead of the traditional digestion method is tedious, detection process is easy to realize automation, improve the detection efficiency.