利用巯基棉富集分离，鲁米诺－双氧水－铬（Ⅲ）化学发光体系监测环境水样中痕量价态砷

Determination of trace arsenic(Ⅲ)and arsenic(Ⅴ)by luminol H 2O 2 Cr(Ⅲ)chemiluminescence with sulfhydryl cotton separation.

用鲁米诺双氧水铬（Ⅲ）化学发光体系结合巯基棉对Ａｓ（Ⅲ）的分离，建立了快速简单的测定水样中痕量价态砷的新方法，检测范围宽（１０×１０－１０－１０×１０－５ｇ／ｍｌ），检出限为６０×１０－１２ｇ／ｍｌ。

A new highly sensitive Chemiluminescence(CL) method was devoloped for the determination of Arsenic,based on the CL reaction of Luminol H 2O 2 Cr(Ⅲ),As(Ⅴ) can be changed into As(Ⅲ)by rebucing regent,then As(Ⅲ)can be separated from other ions on the column of the sulfhydryl cotton.The linear range for the determination of Arsenic was 1 0×10 -10 g/mL 1 0×10 -5 g/mL and detection limit was 6 0×10 -12 g/mL.