摘要
研究了在EDTA介质中元素的ICP MS质谱行为 ,探讨了在不同质谱条件下 ,EDTA的引入对不同元素分析信号的影响。结果表明 :EDTA的引入对元素分析信号有不同程度的增强效应 ,氧化物产率明显降低。对轻质量元素9Be、59Co信号增强约 1 0 0 % ,中质量元素1 1 5In、1 59 Tb信号增强约 2 0 % ,重质量元素2 0 9 Bi、2 38U信号变化不明显 ;LaO+/La+、CeO+/Ce+产率降低约 1 0 %。与通常2 %HNO3介质的溶液相比 ,在相同入射功率条件下 ,EDTA介质中信号达最佳时 ,需采用稍低的雾化气流速。
The ICP MS behaviors of various elements in EDTA medium were studied. The effects of gas flow rates of neblization and concentration of EDTA on signal intensity were investigated in detail. Experimental results showed that the signal intensities of the analyzed elements were enhanced in EDTA medium. The enhancing factor decreased with increase of element mass. The yields of oxides were reduced obviously in EDTA medium. Compared with HNO 3(2+98) solution, a lower gas flow rate of meblization was needed for EDTA solutions to obtain the maximum signal. The easily ionizable elements in EDTA matrix were also responsible for the decrease of signal intensities.
出处
《分析试验室》
CAS
CSCD
北大核心
2002年第1期1-5,共5页
Chinese Journal of Analysis Laboratory
基金
国家自然科学基金 (No .499730 2 6 )与壳幔体系组成
物质交换动力学开放研究实验室基金联合资助
