摘要
采用灰化酸溶法处理样品,火焰原子吸收光谱法测定婴幼儿奶粉中钾、钙、钠、锌、铁和镁6种金属元素的含量。对仪器的工作条件作了详细的叙述。吸光度与6种金属元素的质量浓度之间均呈线性关系。应用此法测得3种婴幼儿奶粉中上述6元素的含量分别为779.41,563.69,779.37 mg/100 g(钾),627.56,430.33,488.6 mg/100 g(钙),254.6,163.5,223.3 mg/100 g(钠),5.90,4.98,6.04 mg/100 g(锌),8.86,7.11,8.00 mg/100 g(铁),55.2,46.4,81.3 mg/100 g(镁)。以上数值均符合国家标准(GB 10766-1997)的规定。
Amounts of K, Ca, Na, Zn, Fe and Mg in 3 brands of infant milk powder were determined by flame atomic absorption spetrometry. The samples were treated by ashing and acid dissolution. The working conditions of the instrument were described in detail. Linear relationships between values of absorbances and mass concentrations of the 6 metal elements were obtained. Concents obtained were 779. 41, 563. 69, 779. 37 mg/100 g （K）, 627.56, 430. 33, 488. 6 rag/100 g （Ca）, 254.6, 163. 5, 223. 3 mg/100 g （Na）, 5. 90, 4.98, 6. 04 mg/100 g （Zn）, 8. 86, 7. 11, 8. 00 mg/100 g （Fe） and 55. 2, 46. 4, 81. 3 mg/100 g （Mg）, respectively. The values mentioned above were in agreement with the requirements of national standard GB/T 10766-1997.
出处
《理化检验（化学分册）》
CAS
CSCD
北大核心
2009年第5期512-513,共2页
Physical Testing and Chemical Analysis(Part B:Chemical Analysis)
关键词
火焰原子吸收光谱法
灰化酸溶法
金属元素
奶粉
Flame atomic absorption spectrometry
Ashing and acid dissolution method
Metal elements
Milk powder
