利用巯基棉富集银,将富集银后的巯基棉灰化,用王水将银氧化并控制30%的盐酸酸度,火焰原子吸收光谱法测定卤水中的痕量Ag。对流速、富集时间和酸度等因素进行了实验,方法可用于卤水中痕量银的分析。检出限为(3S/N)=0.002mg/L,加标回收率为99.0%—101%。相对标准偏差为3.21%(n=11)。 Sulfhydryl cotton was used to enrich silver, the as - polymerized silver sulfhydryl cotton was ashed, the silver was oxidized with aqua regia and the acidity of 30% hydrochloric acid was controlled. The trace Ag in brine was determined by flame atomic absorption spectrometry. Experiments were carried out on the factors such as flow rate, enrichment time and acidity. The method can be used for the analysis of trace silver in brine. The detection limit was (3S / N) = 0.002mg / L, the recovery was 99.0% -101%. The relative standard deviation was 3.21% (n = 11).