钢铁中微量钛的直接催化极谱快速测定

Direct and rapid Determination of trace titanium in Iron and Steed by catalytic Polarography

以－氯乙酸－－氯乙酸钠为缓冲介质（ｐＨ２．８），Ｔｉ（Ⅳ）在邻苯二酚紫－溴化十六烷基三甲铵－氯酸钾体系中产生一个灵敏的催化波，其峰电位为－０．８８Ｖ（ＳＣＥ），Ｔｉ（Ⅳ）浓度在０．００８－０．２４μｇ／ｍｌ范围内与峰电流成正比，不用任何分离可直接测定合金钢及生铁样品中微量钛，并获得满意的结果，方法简单、快速。

In a system containing CH2 C1COOH-CH2CICOONa(pH2.8),pyrocatechol violet(PV),cetyl trimentyammonium bromide(CTMAB),KCIO3,a sensitive catalytic wave of ti(IV)-PV complex was obtained,The peak potential is 0.88V9vsSCE).Therelationship between peak current and concentration of Ti(IV)is linear in the range of 0.009-0.24ug/ml the method hasbeen applied to directly determine trace amounts of ti(IV)in alloy steel and pig iron without any separation withsatisfactory results.the method is simple and rapid.