Haj-Hussein A T
Chemistry Department, Yarmouk University, Irbid, Jordan.
Talanta. 1995 Dec;42(12):2053-7. doi: 10.1016/0039-9140(95)01697-x.
A flow-injection method for the ultraviolet spectrophotometric determination of silver, based on its reaction with nickelocyanide ion, Ni(CN)(2-)(4), in ammoniacal buffer medium (pH 10) and subsequent measurement of the decrease in the absorption of the Ni(CN)(2-)(4) complex at 275 nm is described. The calibration graph is linear in the range 10-400 mum silver. At a sampling rate of about 60 samples h(-1) with 35 mul sample injections, precision was about 1% relative standard deviation. The proposed method was successfully applied to the determination of silver in some common silver minerals.
介绍了一种流动注射紫外分光光度法测定银的方法，该方法基于银在氨性缓冲介质（pH 10）中与镍氰化物离子Ni(CN)₄²⁻反应，随后测量Ni(CN)₄²⁻络合物在275 nm处吸光度的下降。校准曲线在10 - 400 μmol银范围内呈线性。在约60个样品/小时的采样速率下，进样量为35 μl，相对标准偏差约为1%。该方法成功应用于一些常见银矿物中银的测定。
