期刊论文

Liu Meng-Qin

中文

分析化学

0253-3820

2012

40

5

740-744

10.3724/SP.J.1096.2012.10966

国家自然科学基金项目（No.20205005） 湖南省高校创新平台开放基金项目（No.09K099） 湖南省青年骨干教师项目 湖南省科技厅计划项目（No.2011FJ3134）资助

本校为第一且通讯机构

制备了三氮烯修饰碳糊电极(m-NPPAPT/CPE),并研究了Sn(Ⅱ)在该电极上的吸附伏安行为,建立了一种测定痕量锡(Ⅱ)的新方法。采用二阶导数线性扫描溶出伏安法进行分析。结果表明:在1mL 0.5mol/L HCl溶液中,于-1200mV处搅拌富集一定时间,在-1200~-200mV范围内以150mV/s的扫描速度线性扫描,Sn(Ⅱ)吸附在修饰电极表面,于约-476mV(vs SCE)处产生一个灵敏的阳极溶出峰,峰电流比未修饰电极增大约11倍。其峰电流与Sn(Ⅱ)浓度在4.0×10~(-10)~1.0×10~(-8) mol/L和1.0×10~(-8)~4.0×10~(-6) mol/L范围内分两段呈良好线性关系,其线性回归方程分别为i_p(μA)=1.646C(μmol/L)+2.9566和i_p(μA)=52.804C(μmo...

A new method for the determination of trace tin(II) was described. In this study, a 1-(3-Nitrophenyl)-3-(4-phenylazophenyl) triazen (m-NPPAPT) modified carbon paste electrode was pre-pared and the adsorptive stripping voltammetric behavior of tin(II) at the modified electrode was investigated. It was found that in 0.5 mol/L HCI solution, a coordination compound formed by m-NP-PAPT with tin(II). The compound was accumulated and reduced on the surface of the modified electrode at -1200 mV. When scanning linearly was from -1200 mV to -200 mV at a scan rate of 150 mV/s, the sensitive anodic stripp...