Investigation of the role of hollow cathode (vaporization) temperature on the performance of particle beam-hollow cathode atomic emission spectrometry (PB-HC-AES)
Investigation of the role of hollow cathode (vaporization) temperature on the performance of particle beam-hollow cathode atomic emission spectrometry (PB-HC-AES)
复制标题
研究空心阴极（汽化）温度对粒子束-空心阴极原子发射光谱（PB-HC-AES）性能的影响
DOI：
--
复制
发表时间：
2001
期刊：
影响因子：
--
通讯作者：
P. Cable
中科院分区：
文献类型：
--
作者：
M. Dempster;W. Davis;R. K. Marcus;P. Cable
本文研究了阴极温度对粒子束-空心阴极辉光放电原子发射光谱（PB-HC-AES）系统中分析物发射响应的影响。一系列的铜盐作为雾化溶液和干燥颗粒引入，以检查蒸发温度对所得的Cu I发射强度的影响。对于含水样品的分析，使用高效热同心雾化器产生以1.5 mL min−1的速率流动的溶液的精细气溶胶。采用动量分离器-粒子束接口进行去溶剂化，然后将干燥的分析物粒子引入加热的空心阴极辉光放电源中进行蒸发、雾化和激发。在干颗粒分析的情况下，粒子束接口被修改为允许通过真空作用通过1 mm内径的不锈钢管引入样品。蒸发温度和分析物颗粒大小的影响进行了研究，通过监测铜的发射强度，以及通过检查收集的颗粒，通过扫描电子显微镜。结果表明，该组Cu盐的最佳蒸发温度为200-300 °C，通过引入较小尺寸的颗粒获得了增加的分析物发射强度。
An evaluation of the effect of cathode temperature on analyte emission responses for the particle beam-hollow cathode glow discharge atomic emission spectroscopy (PB-HC-AES) system is described. A series of Cu salts were introduced as both nebulized solutions and dry particulates to examine the effect of vaporization temperature on the resulting Cu I emission intensity. For the analysis of aqueous samples, a high-efficiency thermoconcentric nebulizer was used to generate a fine aerosol of the solution flowing at rates of 1.5 mL min−1. A momentum separator–particle beam interface was employed for desolvation and subsequent introduction of dry analyte particles into a heated hollow cathode glow discharge source for vaporization, atomization and excitation. In the case of dry particle analysis, the particle beam interface was modified to allow introduction of samples by vacuum action through a 1 mm id stainless-steel tube. The effects of both vaporization temperature and analyte particle size were investigated by monitoring Cu emission intensity as well as by examining collected particles by scanning electron microscopy. Results indicate an optimum vaporization temperature of 200–300 °C for this group of Cu salts, with increased analyte emission intensities obtained through the introduction of smaller-sized particles.