本文报告了用平台—石墨炉原子吸收法不经分离直接测定水系沉积物中的痕量银。方法用碲为基体改进剂以提高银的灰化温度。其机理可能是银与碲会生成似辉碲银矿(Ag_2Te)的化合物,基本消除了基体干扰。本法中所用平台由作者所设计与制造,材料为光谱纯碳棒,成型后按Zatka的方法作钽处理三次,平台的质量约65毫克。 This paper reports the direct determination of trace silver in aqueous sediments by the platform of Graphite Furnace Atomic Absorption without separation. The method uses tellurium as matrix modifier to increase the ashing temperature of silver. The mechanism may be that silver and tellurium will generate a compound of Ag2Te, which basically eliminates matrix interference. The platform used in this law was designed and manufactured by the author. The material was a spectroscopically pure carbon rod. After shaping, tantalum was treated three times by the Zatka method and the mass of the platform was about 65 mg.