速差催化动力学光度法同时测定痕量PO_4^(3-)和AsO_4^(3-)

Kinetic Catalytic Diffirential Rate Method for the Simultaneous Determination

首次基于和对Zr（Ⅳ）－MTB－CTMAB及Zr（Ⅳ）－MTB－CTMAB－LA体系不同的催化作用，建立了同时测量痕量和的速差催化动力学光度分析法。研究了24种共存离子的影响。对与质量比为1～7的标准混合样品进行了测定，相对误差小于10％。

A new Rate Diffirential Kinetic Catalytic Photometry method for the simultaneous determination of trace PO and AsO has been proposed. It is based on the both reactions Zr (Ⅳ) + MTB(Methylthymol blue) + CTMAB(Cetyitrme thyl - ammonium broride)──→P and Zr (Ⅳ) + MTB + CTMAB + LA(Lactic acid)──→P Which be catalyzed by PO and AsO in diffirent degrees. Standard mixed samples with the weight proportion of WPSO /AsO 1 ~7 have been analyzed. Twenty - four interferent ions have been studied.