石墨炉原子吸收法与分光光度法测定面制食品中的铝  

Determination of Aluminum in Flour Products With Graphite Furnace Atomic Absorption Spectrometry and Spectrophotometry

作　　者：张坤[1] 彭科怀[1] 

机构地区：[1]四川省疾病预防控制中心,成都610041

出　　处：《预防医学情报杂志》2015年第8期611-615,共5页Journal of Preventive Medicine Information

摘　　要：目的对石墨炉原子吸收法与分光光度法测定面制食品中铝进行比较。方法采用高氯酸—硝酸对食品进行前处理,分别用石墨炉原子吸收光谱法和铬天青S分光光度法对食品中铝进行检验。结果石墨炉原子吸收光谱法的线性范围在0.025-0.40 mg/L,使用新原理进行曲线拟合,标准各点均分布在曲线上,相关系数R达到0.999 6,面制品铝含量测定回收率为94.5%-102.7%,RSD1.07%;铬天青S分光光度法的线性范围在0.010-0.10 mg/L,相关系数R为0.997 3,面制品铝含量测定回收率为85.6%-115.7%,RSD3.58%。结论石墨炉原子吸收光谱法比铬天青S分光光度法测定面制品中铝的含量更加简单、快速和准确,回收率更高,值得推广使用。Objective To compare graphite furnace atomic absorption spectrometry（ GFAAS） and spectrophotometry in determination of aluminum in flour products. Methods Food samples were pretreated using perchloric acid- nitric acid and the aluminum was determined with methods of GFAAS and spectrophotometry,respectively. Results Curve fitting was performed using the new theory for GFAAS and standard points were all distributed on the curve. The linear range,correlation coefficients,recoveries and relative standard deviations（ RSDs） of GFAAS were respectively 0. 025- 0. 40 mg / L,0. 9996,94. 5%-102. 7% and 1. 07%; and for chrome azurol S spectrophotometry were respectively 0. 010- 0. 10 mg / L,0. 9973,85. 6- 115. 7% and 3. 58%,respectively. Conclusion GFAAS is more simple,rapid,accurate and with higher recovery than chrome azurol S spectrophotometry for determination of aluminum in flour products and is worthy of popularization and application.

关 键 词：石墨炉 原子吸收光谱法 铬天青S分光光度法 铝 面制品 

分 类 号：R155.5[医药卫生—营养与食品卫生学]