原子荧光光谱法测定食品添加剂磷酸中的砷  

Determination of Arsenic in Food-Additive Phosphoric Acid by Atomic Florescence Spectrometry

作　　者：周大颖 龚小见[2] 

机构地区：[1]贵州省化工产品质量监督检验站,贵阳市晒田坝路1号550002 [2]贵州师范大学天然药物质量控制研究中心,贵阳市宝山北路116号550001

出　　处：《光谱实验室》2012年第5期2831-2833,共3页Chinese Journal of Spectroscopy Laboratory

基　　金：贵阳市科技计划项目([2009]筑科工合同字第1-064号)

摘　　要：建立了原子荧光光谱法测定食品添加剂磷酸中砷的方法。并对负高压、灯电流、载气流量、屏蔽气流量、硫脲与抗坏血酸浓度、载流介质浓度、硼氢化钠浓度等作了研究并予以优化。方法的线性范围为0.0—40.0ng/mL,相关系数为1.0000,检出限为0.02ng/mL,相对标准偏差在0.82%—1.86%之间,试样加标回收率在95.10%—102.20%之间。方法操作简便、灵敏度高、检出限低、重复性和再现性好,完全适用于食品添加剂磷酸中砷的检测。The method for determination of arsenic in food-additive phosphoric acid by atomic florescence spectrometry was established.The experimental conditions were investigated and optimized,including negative high-voltage,lamp current,flow rate of carrier gas,flow rate of shielding gas,concentration of thiourea and ascorbic acid,concentration of the carrier medium,concentration of sodium borohydride.The linear range of the method was 0—40.0ng/mL with correlation coefficient of 1.0000.The detection limit was 0.02ng/mL.The relative standard deviation was 0.82%—1.86%.The recoveries of the method were from 95.10% to 102.20%.This method has simple operation,high sensitivity,lower detection limit and good repeatability,that could be applied to determination arsenic in food-additive phosphoric acid.

关 键 词：原子荧光光谱法 食品添加剂 磷酸 砷 

分 类 号：O657.31[理学—分析化学]