低功率有机ICP中乙醇增敏效应的研究

研究了低功率有机ICP中乙醇对试液物性（密度、粘度、表面张力）及等离子体激发参数（气体温度、激发温度、电子密度和电离温度）的影响。测定了多种元素在不同浓度乙醇水溶液中的检出限。结果表明，乙醇的引入提高了分析物进入等离子体速率，并对具有低激发电位和电离电位的稀土元素有一定的增敏效应，而对具有较高电离电位和激发电位的Cd,Zn,B有抑制作用，并减弱了等离子偏离LTE状态。

Study on Enhancing Effect of Ethanol in Lower Power ICP

The effects of ethanol on physical propesties (density, viscosity, surface tension) of sample solution, plasma temperature and electron number density in the ICP were investigated. Detection limits of varying elements in ethanol water system were determined. The experimental results showed that the gas temperature, excitation temperature and electron number density were lower than those in water solution, the electron temperature and ionization temperature were slightly reduced, while the velocity of aerosol to the plasma increased. The lower detection limits of rare earth elements were observed. The detection limits of other elements were the same as those with water solution. The mechanism of the enhancing effect was discussed.