2017/11/30 10:57
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产品配置单:
光谱/4520A 全自动火焰/石墨炉原子吸收
型号: 科捷4520A
产地: 江苏
品牌: 南京科捷
¥5万 - 10万
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方案详情:
在自然界中,银多以硫化物形式存在,而且主要伴生在铜铅锌等多金属硫化矿物中,银的含量可高达5000g/t,但测定多金属矿中的高含量银尚没有国家标准方法,虽然可参照火试金富集-重量法测定金量和银量,但是火试金法要求特殊的仪器设备,且费时耗能,又不适宜于批量测定,难以满足生产的需要。原子吸收光谱法测定银多在强酸性或氨性介质中进行,前者对仪器腐蚀严重,后者的测量精度较差,且分析范围都比较窄。硫脲能与银等金属离子形成可溶性络合物,硫脲(5%)10毫升可定量络合7mg银。本文采用GGX-6+型原子吸收分光光度计参比工作方式,不用稀释样品溶液,可测定多金属矿中高含量的银。实践证明方法具有操作简便、重现性好、结果准确、不腐蚀仪器等优点。
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