浊点萃取-石墨炉原子吸收光谱法测定食品包装材料中锑
GFAAS Determination of Trace Amount of Antimony in Food Packing Material with Cloud Point Extraction
摘 要
以吡咯烷二硫代氨基甲酸铵(APDC)为络合剂,在pH 5.0乙酸-乙酸钠缓冲溶液中,痕量锑(Ⅲ)与APDC生成络合物,加入表面活性剂Triton X-114用浊点萃取分离富集样品中痕量锑.分取部分表面活性剂相用0.1 mol·L-1硝酸甲醇溶液溶解,所得溶液直接用石墨炉原子吸收光谱法进行测定.对影响浊点萃取的因素和共存离子的干扰等进行了试验并予以优化.方法的检出限(3σ/k)为0.37 μg·L-1.应用所提出的方法测定了食品包装材料陶瓷样品中锑的含量,并用标准加入法进行方法的回收试验,测得回收率为99.3%.
锑
浊点萃取
食品包装材料
GFAAS
Antimony
Cloud point extraction
Food packing material
Abstract
Trace amount of Sb (Ⅲ) was separated and enriched from the sample solution buffered at pH 5 with acetate buffer in the form of a coordination complex with APDC by cloud point extraction using Triton X-114 as surfactant.An aliquot of the surfactant phase was taken and dissolved in 0.1 mol·L-1 nitric acid-methanol solution and its antimony content was determined by GF-AAS.Factors influential to cloud point extraction,and interferences of co-existing ions were studied and optimized.Detection limit (3σ/k) of the method was found to be 0.37 μg·L-1.Value of recovery of 99.3% was obtained by the recovery test with standard addition method.
中图分类号 O657.31
所属栏目 工作简报
基金项目
收稿日期 2009/2/3
修改稿日期
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备注陈伊凡(1986-),男,湖北广水人,硕士研究生,主要从事为包装材料研究.
引用该论文: CHEN Yi-fan,Lv Hong-wei,LI Hou-bin. GFAAS Determination of Trace Amount of Antimony in Food Packing Material with Cloud Point Extraction[J]. Physical Testing and Chemical Analysis part B:Chemical Analysis, 2010, 46(3): 238～240
陈伊凡,吕宏伟,黎厚斌. 浊点萃取-石墨炉原子吸收光谱法测定食品包装材料中锑[J]. 理化检验－化学分册, 2010, 46(3): 238～240
被引情况:
【1】李英杰,侯广顺, "浊点萃取-火焰原子吸收光谱法测定怀药中微量铁",理化检验－化学分册 48, 1069-1071(2012)
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参考文献
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【3】KENDUZLER E,TURKER A R.Preconcentration of cobalt using Amberlyst 36 as a solid-phase extractor and its determination in various environmental samples by flame atomic absorption spectrometry[J].Int J Environ An Ch,2006,86:843-853．
【4】SAFAVI A,ABDOLLAHI H,NEZHAD M R,et al.Cloud point extraction,preconcentration and simultaneous spectrophotometric determination of nickel and cobalt in water samples[J].Spectrochim Acta Part A,2004,60:2897-2901．
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【7】李静,梁沛,施踏青.浊点萃取预富集火焰原子吸收光谱法测定水样中痕量钴[J].分析科学学报,2005,21(2):164-166．
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【10】王新省,龙志成.钨丝探针电解预富集-石墨炉原子吸收法测定罐头中的痕量锡[J].分析化学,2002,30(10):1214．
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