乙醇添加剂对ICP光源等离子体辐射的增强效应  

Enhancing Effect of Ethanol Additive on the Plasma Emission in ICP Source

作　　者：陈金忠[1] 周永利[1] 郭庆林[1] 怀素芳[1] 魏艳红[1] 

机构地区：[1]河北大学物理科学与技术学院,河北保定071002

出　　处：《光谱学与光谱分析》2008年第1期183-187,共5页Spectroscopy and Spectral Analysis

基　　金：河北省科技厅攻关项目(02820180D)资助

摘　　要：利用光电检测法,研究了含乙醇水溶液的温度在20,40和60℃的条件下,对电感耦合等离子体(ICP)光源发射强度、等离子体参数(激发温度和电子密度)、试液物理性质(表面张力、粘度)及雾化特性(提升量、有效提升量和雾化效率)的影响。实验结果表明,随着乙醇含量及相应溶液温度的提高,分析物进入等离子体的速率增大了,元素Zn,Fe,Mg,Si和Sr的谱线强度有明显增强,而且随着含乙醇样品溶液温度的提高,等离子体中激发能力增强了。在溶液温度为60℃时,元素Zn,Fe,Mg,Si和Sr的最大谱线强度比20℃时分别高出了55.8%,45.4%,48.9%,17.7%和21.6%,这有利于痕量元素的检测。In the present paper, the effects of the ethanol-water solution temperature（20, 40, and 60 ℃） on the emission intensity of ICP source, plasma parameters（excitation temperature and electron density）, physical properties（surface tension and viscosity） of sample solution, and nebulization（uptake rate, effective uptake rate and nebulization efficiency） were studied by using optical-to-electrical detection method. The experimental results showed that the velocity of the sample entering the plasma increased, so that the line intensity of the elements Zn, Fe, Mg, Si, and Sr in water increased obviously with increasing the content of ethanol and the rise of the corresponding solution temperature. And the excitation capacity in the plasma was strengthened with the rise of the ethanol-water solution temperature. The maximal spectrum intensity of the elements Zn, Fe, Mg, Si, and Sr at 60 ℃ was higher by 55.8%, 45.4%, 48.9%, 17.7%, and 21.6% than that at 20 ℃, respectively. It’s valuable for the detection of the trace element.

关 键 词：乙醇添加剂 溶液温度 增强效应 

分 类 号：O657.3[理学—分析化学]