摘要
研究了ICP(电感耦合等离子体Inductively Coupled Plasma)中甲基异丁基甲酮对试液物理性质(表面张力、粘度)及雾化特性的影响,观测了发射强度和信背比及阳流和栅流随加入浓度变化的关系,并且用ICP发射光谱法测定了自来水中的Pb元素。结果表明,试液物理性质的改变使雾化效率提高了,光谱强度增强了。用该方法对自来水样品中Pb元素的测定结果平均值为1.933*10-3mg/L,RSD为3.87%,回收率为107%。
The effects of MIBK on the physical properties （ surface tension, viscosity） and nebulization of sample solution in the ICP were investigated. The relation of emission intensity, signal - to - background ratio, anode current, and grid current with concentration were observed. The elements of Pb in tap water were determined by ICP - AES. The experimental results showed that the change in physical properties of sample solution led to the improvement of efficiency of nebulizer and the increase of line intensity. The determined average result of Pb in tap water was 1. 933 ＊ 10^-3 mg/L, RSD 3.87%. Recoveries of Pb was 107%.
出处
《现代科学仪器》
2007年第3期104-106,共3页
Modern Scientific Instruments
基金
河北省科技厅攻关项目(02820180D)资助
