Determination of silver in gold-loaded resin materials byinductively coupled plasma atomic emission spectrometry
CHEN Ting-ting1, LIU Jun2, GUAN Ming1, YANG Zhong*2, WANG Ting2
1. College of Chemistry and Chemical Engineering, Xinjiang Normal University, Urumqi 830054, China; 2. Technology Center of Xinjiang Entry-exit Inspection and Quarantine Bureau, Urumqi 830063, China
Abstract：After the gold-loaded resin material was ashed at high temperature, the residue was dissolved 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 be overcome by matrix matching. The detection limit of the method was 0.008 1 μg/mL. The relative standard deviations of the sample determination 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.
