摘要
目的比较湿消解法和微波消解法,两种测定婴儿奶粉中铁铜锌镁前处理方法的差异。方法用两种方法分别处理奶粉样品,用电感耦合等离子体质谱法测定奶粉中铁铜锌镁含量。结果两种方法检出限一致,均在0.001~0.05mg/kg,平均回收率湿法消解为95.3%~98.5%,微波消解为96.8%~98.6%,6次平行测定相对标准偏差(RSD),湿法消解为0.41%~3.29%,微波消解为1.54%~4.04%。结论两种前处理方法检验结果一致,均适用于婴儿奶粉中铁、铜、锌、镁4种营养元素的测定。
Objective To compare the difference between the wet digestion method and microwave digestion method in determination of the iron,copper,zinc and magnesium content in infant milk powders.Methods The sample of milk powder was divided into two groups and was processed by wet digestion method and microwave digestion method,respectively.The iron,copper,zinc and magnesium in two groups were determined by inductively coupled plasma mass spectrometry.ResultThe limits of detection of above 2 methods were consistent,both in the range of 0.001 to 0.05 mg/kg,the average recovery rates of wet digestion were 95.3%to 98.5%,and those of the microwave digestion group were from 96.8%to 98.6%.When samples were subjected to 6 parallel determinations,the RSDs of the wet digestion method were from 0.41%to 3.29%;while the RSDs of the microwave method were from 1.54 % to 4.04%.Conclusion The detection results of both methods were consistent,which make them suitable for the determination of 4 nutrient elements in infant milk powders.
出处
《江苏预防医学》
CAS
2018年第1期9-10,21,共3页
Jiangsu Journal of Preventive Medicine
基金
"十三五"江苏省医学青年人才项目(QNRC2016540)
江苏省预防医学科研课题(Y20130053)
江苏省医学重点学科-流行病学(ZDXKA2016008)
关键词
奶粉
铁
铜
锌
镁
前处理方法
湿法消解
微波消解
电感耦合等离子体质谱法
Milk powder
Iron
Copper
Zinc and Magnesium
Pre-processing method
Wet digestion
Microwave digestion
Inductively coupled plasma mass spectrometry
