摘要
在浓度为０．２ｍｏｌ／ＬＮＨ３·Ｈ２Ｏ－０．２ｍｏｌ／ＬＮＨ４Ｃｌ（ｐＨ＝９．２０）的底液中，辛可尼丁在单扫示波极谱上有一灵敏的催化氢波。导数波峰电位于－１．４２Ｖ（ｖｓ．ＳＣＥ）附近。该峰具有一定吸附性。当辛可尼丁浓度在１．０×１０－７～１．０×１０－６ｍｏｌ／Ｌ范围内时，与峰高成线性关系。检测限为５．０×１０－８ｍｏｌ／Ｌ。本文对极谱波的性质和电极过程机理进行了较详细的探讨。
n a supporting electrolyte
containing 0.2mol/L NH3H2O0.2mol/L NH4Cl and at pH9.20,a sensitive catalytic hydrogen wave
of cinchonidine was obtained by singlesweep polarography.It was found that the peak potential
of the derivative wave is -1.42V(vs.SCE).The relationship between the peak height and
concentration of cinchonidine is linear in the range of 1.010-71.010-6mol/L and the detection
limit is 5.010-8mol/L.The electrode process,reaction mechanism and polarographic behavior
have been discussed in detail.
出处
《分析试验室》
CAS
CSCD
1999年第4期22-25,共4页
Chinese Journal of Analysis Laboratory
