通过样品重注技术测定高氯和高硫酸盐基质中的砷酸盐
AN-S-298
zh
阴离子色谱柱 Metrosep A Supp 15 - 150/4.0 是一种大容量色谱柱。在氯化物含量为 180 毫克/升、硫酸盐含量为 320 毫克/升的基质中无法直接测定砷酸盐，因为在硫酸盐峰尾下几乎检测不到砷酸盐。样品再注入可以切断大部分基质，因此可以准确测定砷酸盐。
The anion column Metrosep A Supp 15 - 150/4.0 is a pretty high-capacity column. The direct determination of arsenate in a matrix of 180 mg/L chloride and 320 mg/L sulfate is not possible, as the arsenate is hardly detectable under the sulfate peak tail. Sample reinjection cuts off the majority of the matrix and therefore allows an accurate determination of the arsenate.