Determination of calcium and phosphorus in milk powder by ultrawave digestion-ICP-MS
The presented method was developed to determine the concentration of calcium and phosphorus in milk powder by ultrawave diges-tion-ICP-MS.The Octopole Reaction System and the ISTD adding on line were applied in this study.The method was verified by reference material comparison and recovery test.The linear ranged from 0 to 150 mg/L,and a good linear relationship(R2＞0.9995)was observed.The detec-tion limit and the quantitative limit meet the requirements of the national standard and the relative standard deviation(RSD)of 1.17％and 0.67％.The results of the quality control samples were all within the specified range.The recoveries ranged from 96.3％to 104.4％in milk powder.There was no significant difference in the results of multiple milk powder samples detected by different methods.The experiment shows that the method is simple,rapid,accurate and stable,can reduce matrix interference,and can detect the content of calcium and phosphorus in milk powder at the same time.
万方数据
维普
