摘要
研究亚硝酸根对原子荧光测硒、砷和汞的影响。当添加3.3mg和13.3mgNO_2^-时,硒和砷的信号被抑制65%和50%;添加了66.7mgNO_2^-,汞也不受影响。实验表明:使用4%硼氢化钾溶液和添加氨基磺酸可以有效消除亚硝酸根的干扰。
A systematic investigation was performed concerning the interference of nitrite on the determination of selenium, arsenic and mercury by atomic fluorescence spectrometry （AFS）. The Se and As signal were reduced by about 65% and 50% upon the addition of 3.3mg and 13.3mg NO2^-. For Hg, no interference of nitrite was observed up to 66.7mg of NO2^-. This experiment proved the interference of NO2^- can be effectively eliminated by sulfamic acid （SA） addition and 4% KBH4 solution.
出处
《现代科学仪器》
2008年第2期86-87,共2页
Modern Scientific Instruments
关键词
亚硝酸根
硒
砷和汞
原子荧光
微波消解
nitrite
selenium, arsenic and mercury
atomic fluorescence spectrometry
microwave digestion
