发射光谱法直接测定地质比探试样中钨的灵敏度较低,一般为3—5ppm,不能满足地质化探佯品分析的要求。本方法采用高浓度的氯化镉溶液代替固体粉末缓冲剂滴加于装样电极头上来处理试样,利用大量镉盐的蒸发控制电弧温度,致使W、Mo和其它难挥发元素分馏和Cl~-在电极中辅以一定的氯化作用的办法,有效地改善了W、Mo等元素的蒸发行为,降低了光谱背景,将两元素 Direct Determination of Emission Spectrometry Geometry than the low sensitivity of tungsten in the test sample, usually 3-5ppm, can not meet the requirements of geochemical prospecting product analysis. The method uses a high concentration of cadmium chloride solution instead of the solid powder buffer dropped on the loading electrode sample to deal with the sample, the use of a large amount of cadmium salt evaporation control of the arc temperature, resulting in W, Mo and other volatile elemental fractionation and Cl ~ - In the electrode assisted by a certain amount of chlorination, effectively improve the W, Mo and other elements of the evaporation behavior, reducing the spectral background, the two elements