电感耦合等离子体原子发射光谱法测定载金树脂物料中银含量

Determination of silver in gold-loaded resin materials by inductively coupled plasma atomic emission spectrometry

载金树脂物料经高温灰化后，用王水溶解残渣，选择328．628nm波长的光谱线作为银的分析线，采用电感耦合等离子体原子发射光谱法（ICP—AES）测定了试液中的银。金、铁、铝、硅、硫等基体元素产生的基体效应采用基体匹配的方法克服。方法的检出限为0．0081ttg／mL，样品测定结果的相对标准偏差在5．1％～7．3％范围，回收率在93．4％～103．4％之间。方法简便、快速、可靠，可用于进口载金树脂物料样品中银的测定。

After the gold-loaded resin material was ashed at high temperature, the residue was dis- solved in aqua regia. The spectral line with the wavelength of 328. 628 nm was selected as the analysis line for silver, and silver in the analyte solution was determined by inductively coupled plasma atomic emission spectrometry （ICP-AES）. Such matrix elements as gold, iron, aluminum, silicon and sulfur had little interference in the determination of silver and it could he overcome by matrix matching. The detection limit of the method was 0. 008 1 g/mL. The relative standard deviations of the sample de- termination results were in the range of 5.1 -7.3 %, and the recoveries were in the range of 93.4 -103.4 %, so the method could be used in the determination of silver in imported gold-loaded resin materials.