示波极谱法测定大气总悬浮微粒中微量锌

The determination of trace zine in atmospheric total suspended particulate by oscillopolarography

在乙二胺 (en)介质中 (p H1 1 .5～ 1 2 .3 ) ,Zn(en) 2 +3在单扫描示波极谱仪上于 -1 .42 V(vs.SCE)处产生一灵敏的络合物吸附波 ,锌含量在 0 .0 0 6～ 0 .3 5 μg/ml范围内 ,浓度与峰电流呈线性关系。检测限为 0 .0 0 3 μg/ml。加标回收率为92 %～ 1 0 3 % ,相对标准偏差小于 4.1 %。该方法准确、简便、选择性好 ,可用于 TSP中微量锌的测定。

This paper studied on determination of trace zine in atmospheric total suspended particulate by oscillopolarography In the ethylenediamine medium (pH 11 5~12 3), by using single sweep polarography, we found a sensitive polarographic adsorptive wave of Zn(en) 2+ 3 and at E P of -1 42V(vs SCE) Linear relationship is kept in the range 0 006~0 35μg/ml Result indicated that the recovery was in 92%~103% and the RSD was less than 4 1% This method is accurate simple, and selective This method can be used for the determination of trace zine in atmospheric total suspended particulate