Dabeka R W, McKenzie A D
J Assoc Off Anal Chem. 1981 Nov;64(6):1297-300.
Foods (5-40 g) are digested sequentially with HNO3 and HCI, diluted to 100 mL, and filtered, and tin is determined by atomic absorption using an N2O-C2H2 flame. Synthetic standards in 10% HCl are used. A positive interference by potassium is compensated by adding 100 micrograms potassium/mL to both standards and samples. Recoveries for 17 foods spiked with tin at levels between 40 and 500 micrograms/g ranged from 85 to 110% with a mean of 101%. Results agreed well with a solvent extraction atomic absorption method and a direct X-ray fluorescence method.
将食物（5 - 40克）依次用硝酸和盐酸消化，稀释至100毫升，过滤，然后使用氧化亚氮 - 乙炔火焰通过原子吸收法测定锡。使用10%盐酸中的合成标准品。通过向标准品和样品中均加入100微克钾/毫升来补偿钾的正干扰。对于添加了40至500微克/克锡的17种食物，回收率在85%至110%之间，平均为101%。结果与溶剂萃取原子吸收法和直接X射线荧光法的结果非常吻合。
