全微机化极谱法测定地质样品中Ag的方法探讨

Exploratory Investigation on Determination of Ag in the Geological Sample by Microcomputer Polarography

地质试样用盐酸、硝酸分解 ,在湿盐状态下加入盐酸、氯化铵及氨水 ,在此底液中进行银的极谱测定 ,峰电位约为 - 0 .2 8V(对饱和甘汞电极 )。银含量在 0 .0 0— 0 .4 0 mg/ m L之间时 ,峰高与浓度呈线性关系。测定范围 0 .0 5 0 %— 2 0 .0 0 %。

Sample is resolved by the hydrochloric acid,nitric acid.It is added the hydrochl oric acid,the ammonium chloride and the ammonia water on the condition of the we t salt state.Ag is measured by polarography in this base solution.Potential of c rest value is -0.28V(to saturated calomel electrode).When content of silver is a t 0.00—0.40mg/mL,the peak height is linear dependence with concentration.Measur ement range is 0.050%—20.00%.