Sorption of arsenic, antimony and bismuth on glycolmethacrylate gels with bound thiol groups for direct sampling in electrothermal atomic absorption spectrometry
Sorption of arsenic, antimony and bismuth on glycolmethacrylate gels with bound thiol groups for direct sampling in electrothermal atomic absorption spectrometry
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具有结合硫醇基团的乙二醇甲基丙烯酸酯凝胶对砷、锑和铋的吸附，用于电热原子吸收光谱法中的直接采样
DOI：
10.1016/0003-2670(80)87029-2
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发表时间：
1980
期刊：
影响因子：
--
通讯作者：
B. Dočekal
中科院分区：
文献类型：
--
作者：
Z. Slovák;B. Dočekal
用1M硫酸从溶液中批量吸附砷、锑、铋的分配系数为104~105。含硫基团(球状硫醇)的亲水性甲基丙烯酸酯凝胶可以在60分钟内定量吸附铋或砷，120分钟内吸附锑。优化了吸附在硫醇上并以悬浮液形式注入石墨管的砷的电热雾化条件。灵敏度分别为3.2 ng As m l~(-1)、13 ng Sb m l~(-1)和2.8 ng B i m l~(-1)，10 ng As的变异系数为4%。加入5%氯化钾或5%氯化镁溶液及河水中，回收率为40 ng·ml~(-1)。
Batch sorption of arsenic, antimony and bismuth from solutions in 1 M sulphuric acid has distribution coefficients of 104–105. Quantitative sorption on the hydrophilic methacrylate gel containing thiol groups (Spheron Thiol) is possible within 60 min for bismuth or arsenic and 120 min for antimony. Conditions for the electrothermal atomization of arsenic sorbed on Spheron Thiol and injected into the graphite tube as a suspension are optimized. The sensitivities possible are 3.2 ng As ml-1, 13 ng Sb ml-1and 2.8 ng Bi ml-1; the coefficient of variation for 10 ng of As is 4%. Complete recovery of 40 ng As ml-1added to solutions of 5% KCI or 5% MgCl2and to river water was obtained.