摘要
硅钼蓝杂多酸在ｐＨ９．６ＮＨ３－ＮＨ４Ｃｌ缓冲液中于－１．１２Ｖ（ｖｓ．ＳＣＥ）处产生一个灵敏的极谱吸附波，导数波高与硅浓度在０．０２～１０μｇ．ｍｌ－１有线性关系，检出限０．００８μｇ·ｍＬ－１．用于天然水中痕量硅测定，回收率为９４．８％～１０３．４％。对浓度为０．１６μｇ·ｍＬ－１水样１１次测定，相对标准偏差为４．１％．
In NH3-NH4CI buffer(pH =9.6) silicomolybdic heteropoly blue can produce a sensitive polarographic wave with peak potential at -1.12 V(vs. SCE). The derivative peak height is directly proportional to the silicon concentration in the range of 0.02～ 10 μg /mLand the detection limit is 0.008 μg/ mL The metod is applied to the determination of silicon in natural water with satisfactoryresults. The behavior of the polarographic wave is studied.The wave has proved tobe a polarogaphic catalytic wave with adsorptive behavior.
出处
《桂林工学院学报》
1995年第3期276-279,共4页
Journal of Guilin University of Technology
关键词
硅
硅钼蓝
杂多酸
极谱法
silicon
silicomolybdic heteropoly blue
adsorptive polarographic wave
