摘要
为建立一简便快速的测定水中银的方法，采用在线连续流动富集－火焰原子吸收法对地表水中的银进行了测定。结果发现水中痕量银可用在线连续流动下被内充活性炭颗粒的富集柱吸附，吸附银可为稀硫代硫酸钠溶液洗脱，结合火焰原子吸收法可对低至μｇ／Ｌ水平的银实现精密测定。该法对水样１０次平行测定的相对标准差为６．９％，加标回收率为９３．２％～１０５％。如取２５ｍｌ样品分析，采样频率为７～８份／小时。
In a continuous flow on line preconcentration system, trace silver was adsorbed onto activated carbon particles packed in micro colum at pH 1, eluted with 0.3ml of 10 g/L Na 2S 2O 3 solution and determined by flame atomic absorption spectrometry. For surface water samples, 25ml sufficed precise determination of silver at level of μg/L. The relative standard deviation of 10 parallel sample determinations was 6.9%. The proposed method was successfully applied to water samples with recoveries ranging from 93.2% to 104.6% and a throughput of 7 8 sampling/h.
出处
《华西医科大学学报》
CSCD
1997年第2期225-228,共4页
Journal of West China University of Medical Sciences
关键词
火焰原子吸收法
在线富集
银
地面水卫生
Continuous flow analysis flame atomic absorption spectrometry On line preconcentration Silver
