ICP-AES Determination of TiO2 in Plastic Packing Materials for Food with Microwave Assisted Sample Digestion
摘 要
100 mg已研磨的食品塑料包装材料,用硝酸4 mL和硫酸3 mL混合酸消解,采用电感耦合等离子体原子发射光谱法测定所得试样溶液中二氧化钛的含量。选择336.122 nm波长为钛的分析线,钛的质量浓度在25 mg·L-1以内与其信号值呈线性关系,方法的检出限(3S/N)为4.0 mg·kg-1。方法的加标回收率在93.6%~101.2%之间,相对标准偏差(n=8)小于1%。
Abstract
ICP-AES was applied to the determination of TiO2 in plastic food packing materials. One hundred mg of sample was homogenized and digested with mixed solution containing 4 mL of con. HNO3 and 3 mL of con. H2SO4. Wavelength of 336.122 nm was selected as analytical spectral line for determination of Ti in sample solution. Linear relationship between values of analytical signal and mass concentration of titanium was kept in the range within 25 mg·L-1, with detection limit (3S/N) of 4.0 mg·kg-1. Values of recovery obtained by standard addition method were in the range of 93.6%-101.2%. Test for precision was made and RSD′s (n=8) found were less than 1%.
中图分类号 O657.3
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基金项目 浙江省质量技术监督系统重大科研项目(浙质联发[2007]5号,20060301)
收稿日期 2010/2/11
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备注张东雷(1964-),女,河南人,高级工程师,主要从事食品及其包装材料中有毒有害物质的检测和检测技术研究。
引用该论文: ZHANG Dong-lei,LI Xin,ZHANG Yue,CHEN Xiao-zhen. ICP-AES Determination of TiO2 in Plastic Packing Materials for Food with Microwave Assisted Sample Digestion[J]. Physical Testing and Chemical Analysis part B:Chemical Analysis, 2011, 47(3): 344~345
张东雷,李鑫,张越,陈小珍. 微波消解-电感耦合等离子体原子发射光谱法测定食品塑料包装材料中二氧化钛[J]. 理化检验-化学分册, 2011, 47(3): 344~345
被引情况:
【1】张丽萍,王利,翟旭杰, "微波消解-电感耦合等离子体原子发射光谱法测定药用胶囊和明胶中铬",理化检验-化学分册 50, 1166-1167(2014)
【2】杨蓓,萧达辉,李涵,黄金宇,梁淑华,李政军,郑建国, "有机直接进样-电感耦合等离子体原子发射光谱法直接测定醇系食品模拟物中特定元素的迁移量",理化检验-化学分册 51, 1084-1086(2015)
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参考文献
【1】朱融融,汪世龙,姚思德.纳米二氧化钛的生物学效应[J].生命的化学, 2005,25(4):344-346.
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