摘要
在ＨＣｌＮａＮＯ３介质中，Ｚｒ（Ⅳ）硝基磺酚Ｃ安替比林形成的络合物在－０．３３Ｖ（ｖｓ．ＳＣＥ）处产生一灵敏的极谱波。Ｚｒ（Ⅳ）在１０～１４０μｇ／Ｌ与波高呈线性关系，检出限４．５μｇ／Ｌ。该波具有吸附和动力性质，为一不可逆波。方法经水系沉积物和岩石标准物质分析验证，测定结果与标准值相符。对质量分数在１０－６水平Ｚｒ（Ⅳ）测定的ＲＳＤ（ｎ＝７）为３．２％。
A sensitive polarographic wave of Zr(Ⅳ) SNPC Ant. complex was observed in the solution of 0.1 mol/L HCl 0.4 mol/L NaNO 3 1.0×10 -5 mol/L SNPC 3 g/L antipyrine with peak potential at -0.33 V ( vs .SEC). A good liner relationship between peak current and concentration of Zr (Ⅳ) in the range of 10?140 μg/L was obtained with detection limit of 4.5 μg/L for Zr (Ⅳ). It has been proved that the electrode process is irreversible and the polarographic wave for Zr(Ⅳ) complex is of absorptive and kinetic charactors. This polarographic wave has been applied to the determination of Zr(Ⅳ) in some standard references (steam sediments and rocks) with satisfactory results. The precision of 3.2% RSD ( n =7) in the sample with mass fraction w (Zr) of 10 -6 was obtained.
出处
《岩矿测试》
CAS
CSCD
北大核心
1998年第3期185-189,共5页
Rock and Mineral Analysis
