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磷酸二氢铵为基体改进剂石墨炉原子吸收光谱法测定葡萄酒中铅
引用本文:左正运,张敏,孙致安,王德淑.磷酸二氢铵为基体改进剂石墨炉原子吸收光谱法测定葡萄酒中铅[J].光谱学与光谱分析,2002,22(5):859-861.
作者姓名:左正运  张敏  孙致安  王德淑
作者单位:1. 铜陵出入境检验检疫局,安徽,铜陵,244000
2. 铜陵市环境监测站,安徽,铜陵,244000
摘    要:研究了用NH4H2PO4,PdCl2,Ni(NO3)2,Mg(NO3)2作基体改进剂对石墨炉原子吸收光谱法直接测定葡萄酒中Pb的影响,实验表明NH4H2PO4,Ni(NO3)2具有明显的基体改进作用,NH4H2PO4效果最好,选择NH4H2PO4为基体改进剂,采用标准加入法,建立一种直接测定葡萄酒中痕量Pb的快速分析方法。

关 键 词:基体改进剂  测定  磷酸二氢铵  石墨炉原子吸收光谱法  葡萄酒  
文章编号:1000-0593(2002)05-0859-03
修稿时间:2001年10月18

Determination of Lead in Grape Wine by Graphite Furnace Atomic Absorption Spectrometry with Ammonium Dihydric Phosphate as Modifier
ZUO Zheng-yun ,ZHANG Min ,SUN Zhi-an ,and WANG De-shu .Tongling Entry-Exit Inspection and Quarantine Bureau,Tongling ,China .Tongling Environmental Monitoring Station,Tongling ,China.Determination of Lead in Grape Wine by Graphite Furnace Atomic Absorption Spectrometry with Ammonium Dihydric Phosphate as Modifier[J].Spectroscopy and Spectral Analysis,2002,22(5):859-861.
Authors:ZUO Zheng-yun  ZHANG Min  SUN Zhi-an  and WANG De-shu Tongling Entry-Exit Inspection and Quarantine Bureau  Tongling  China Tongling Environmental Monitoring Station  Tongling  China
Institution:Tongling Entry-Exit Inspection and Quarantine Bureau, Tongling 244000, China.
Abstract:Ammonium dihydric phosphate (NH4H2PO4), palladium chloride, nickelous nitrate and magnesium nitrate were used as modifiers respectively, to directly detect lead in grape wine with graphite furnace atomic absorption spectrometry(GFAAS). The results showed that NH4H2PO4 might be the best modifier. It was found that the organic matter in grape wine interfere with the determination. To remove the interference and detect lead directly with GFAAS, not only did samples need to be diluted with 4 to 10 times sample volumes of de-ionized water, but also the standard addition method was used. The method had good precision and accuracy when concentration of lead was above 10 micrograms.L-1, the relative standard deviations of lead were between -5.4% and 6.2%.
Keywords:Ammonium dihydric phosphate  GFAAS  Grape wine  Lead
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