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在氨性介质中直接进行原子吸收测定矿石中的银,近来发现含氧化钙0.2克(按本法分析手续相当于4毫克/毫升)使结果偏高,随着钙量的增加,银的结果也增高。本文采用加入碳酸铵溶液生成碳酸钙沉淀,较长时间放置,未发现碳酸钙沉淀对银离子的吸附而使结果偏低。本法操作简便、重现性好。一仪器工作条件及主要试剂仪器:日立-508型原子吸收光谱仪器工作条件: 辐射源:银空心阴极灯;灯电流:4mA;波长,3281(?);狭缝:入射(3),出射:(3):燃烧器:水冷式三缝燃烧器;燃烧器高度标尺:(2);空气压力和流
Direct determination of silver in ore by atomic absorption directly in ammoniacal media has recently found that 0.2 g of calcium oxide (equivalent to 4 mg / mL according to the procedure of this method) gives a high result and as the amount of calcium increases, the silver result Also increased. In this paper, the addition of ammonium carbonate solution to form calcium carbonate precipitation, a long time to place, did not find calcium carbonate precipitation on the adsorption of silver ions and the result is low. This method is simple, reproducible. An instrument working conditions and the main reagents Instruments: Hitachi-508 atomic absorption spectrometer Working conditions: radiation source: silver hollow cathode lamp; lamp current: 4mA; wavelength, 3281 (?); Slit: incident (3) (3): Burner: water-cooled three-slit burner; burner height gauge: (2); air pressure and flow