申请人:Board of Trustees of Michigan State University
公开号:US20040101971A1
公开(公告)日:2004-05-27
A method and test for field sample arsenic speciation in aqueous solutions, in particular, arsenic speciation in drinking water, is described. In particular, the method and test uses in series three columns wherein the first column removes interfering cations from water, the second column removes dimethylarsenate (DMA) from the water, and the third column removes As(V) (collectively H
3
AsO
4
/H
2
AsO
4
−
/HAsO
4
2−
/AsO
4
3−
) and monomethylarsinate (MMA) while As(III) (collectively H
3
AsO
3
/H
2
AsO
3
−
/HAsO
3
2−
/AsO
3
3−
) remains in the water effluent. The bound arsenic species are separately eluted from the columns in a laboratory and then each of the eluants and the effluent are tested for the arsenic species, preferably using graphite furnace atomic absorption spectroscopy.
描述了一种现场取样检测水溶液中砷(特别是饮用水中砷)含量的方法和测试。特别是,该方法和测试串联使用了三个色谱柱,其中第一个色谱柱去除水中的干扰阳离子,第二个色谱柱去除水中的二甲基砷酸酯(DMA),第三个色谱柱去除 As(V)(统称为 H
3
AsO
4
/H
2
AsO
4
-
/HAsO
4
2-
/AsO
4
3-
)和单甲胂酸盐(MMA),而 As(III)(统称为 H
3
AsO
3
/H
2
AsO
3
-
/HAsO
3
2-
/AsO
3
3-
)残留在出水中。在实验室中将结合的砷物种分别从色谱柱中洗脱出来,然后对每种洗脱液和出水进行砷物种检测,最好使用石墨炉原子吸收光谱法。