微波消解-石墨炉原子吸收光谱法测定面制食品中的铝  

Microwave digestion and GFAAS assay for the detection of aluminium in flour foods

作　　者：赵馨[1] 马兰[1] 周爽[1] 杨大进[1] 

机构地区：[1]中国疾病预防控制中心营养与食品安全所,北京100021

出　　处：《中国食品卫生杂志》2011年第6期549-552,共4页Chinese Journal of Food Hygiene

摘　　要：目的根据以往实际应用中发现的分光光度法操作繁复、干扰因素多,电感耦合等离子体质谱法仪器昂贵、运行成本较高等问题有针对性地建立微波消解石墨炉原子吸收法测定面制食品中的铝。方法试样经微波消解后导入原子吸收分光光度计石墨炉中,原子化后吸收257.4 nm共振线,测得试样吸光度与标准系列比较定量。结果铝在0～500μg/L范围内线性关系良好,相关系数大于0.999;方法检出限为2 mg/kg;定量限为6 mg/kg。结论该方法测定面制食品中的铝快速、简便、结果准确。Objective Considering the disadvantages of complicated operation steps for spectrophotometry methods with plenty of influencing factors,and the high cost for ICP-MS,an applicable determination method for aluminium in flour foods was established by microwave digestion and GFAAS assay.Methods After digested in microwave,the sample was introduced into GFAAS for analysis.The absorption resonance line at 257.4 nm of samples and standard series was compared and the content of aluminium was measured quantitatively.Results The absorbance of aluminium at 0~500 μg/L was in good linear relation（r0.999）;The limit of detection was 2 mg/kg and the limit of quantification was 6 mg/kg.Conclusion The method of detecting aluminium in flour foods with microwave digestion and GFAAS detection is fast,simple and accurate.

关 键 词：微波消解 石墨炉原子吸收光谱 铝 面食 食品污染物 食品安全 

分 类 号：O657.31[理学—分析化学] R155.5[理学—化学]