摘要
在乙二铵介质中 ,铬 ( )与亚硝酸钠产生一灵敏极谱催化波 ,波峰敏锐 ,波形良好 ,峰电位为 -1.66V(vs,SCE) ,检出限为 0 .0 0 5μg/L ,铬 ( )浓度在 0 .0 1-2 0μg/L范围内与峰电流呈线性关系。本法用于水中痕量铬 ( )的测定 ,结果满意。
In the modium of diaminoethane,Chromium(Ⅵ)and nitronatrium produce a sensitive catalytic polarographic wave.The wave peak is sharp,and the wave shape is fine,the peak potential is at 1.66V(vs,SCE),the lower detection limit is 0.005μg/L,When the Chromium(Ⅵ) concentration range within 0.01-20μg/L,it is linear with peak height.This method is used in determination of trace Chromium(Ⅵ) in water.The result is satisfactory.
