活性炭富集—火焰原子吸收光谱法测定金精矿中的金
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摘要
采用国家标准火试金重量法测定金精矿中的金,存在操作复杂、测试周期长、成本高、污染环境等问题,且不适合批量测定。实验建立了活性炭富集—火焰原子吸收光谱法测定金精矿中金的方法。考察了称样量、焙烧方式、灰化温度、干扰元素和王水用量对金测定的影响。该方法测定范围为10. 00～150. 00 g/t,检出限为0. 019μg/m L,测定结果的相对标准偏差为0. 93%～2. 56%,加入标准物质回收率为96. 5%～103. 1%。本方法与国家标准方法测定结果吻合良好,具有精密度好、准确度高、成本低等优点,适合金精矿中金的批量测定。
The gold determination by national standard fire assay weight method is complicated in operation,long in testing time,high in cost and pollutes the environment. Besides,it is not suitable for batch test. The experiment establishes activated carbon concentration-flame atomic absorption spectrometry to determine gold in gold concentrates.The effects of sample weight,roasting method,ashing temperature,interference elements and aqua regia content on the determination of gold are discussed. The determination scope of the method was 10. 00 g/t to 150. 00 g/t,the detection limit is 0. 019 μg/m L,relative standard deviation of determination results ranged from 0. 93 % to 2. 56 %,and the recovery of reference material was in the range of 96. 5 % to 103. 1 %. The method is consistent to the national standard method,and is precise,accurate and low-cost,suitable for batch gold determination in gold concentrates.
The gold determination by national standard fire assay weight method is complicated in operation,long in testing time,high in cost and pollutes the environment. Besides,it is not suitable for batch test. The experiment establishes activated carbon concentration-flame atomic absorption spectrometry to determine gold in gold concentrates.The effects of sample weight,roasting method,ashing temperature,interference elements and aqua regia content on the determination of gold are discussed. The determination scope of the method was 10. 00 g/t to 150. 00 g/t,the detection limit is 0. 019 μg/m L,relative standard deviation of determination results ranged from 0. 93 % to 2. 56 %,and the recovery of reference material was in the range of 96. 5 % to 103. 1 %. The method is consistent to the national standard method,and is precise,accurate and low-cost,suitable for batch gold determination in gold concentrates.
引文
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[2]史博洋,王皓莹,谢大伟.火试金富集-电感耦合等离子体发射光谱(ICP-OES)法测定分银渣中的铂、钯[J].中国无机分析化学,2018,8(1):53-56.
[3]陈永红,孟宪伟,苏广东,等. 2013—2014年中国金分析测定的进展[J].黄金,2016,37(1):79-85.
[4]武锦.改进预处理方法对提高聚氨酯泡沫塑料富集金能力的探讨[J].黄金,2017,38(5):76-78.
[5]赵延庆.聚氨酯泡沫塑料吸附-电感耦合等离子体质谱法测定地质化探样品中金[J].冶金分析,2016,36(7):34-38.
[6]李得军.活性炭富集ICP-AES法测定铜精矿中的微量金含量[J].世界有色金属,2016(12):184.
[7]唐志中,颜芝,王军.活性炭富集化学光谱法测定化探样品中的痕量铂、钯、金[J].黄金,2003,24(9):48-50.
[8]中华人民共和国国家质量监督检验检疫总局,国家标准化管理委员会.金精矿化学分析方法第1部分:金量和银量的测定:GB/T 7739. 1—2007[S].北京:中国标准出版社,2007.
[9]胡宪.活性炭吸附-碘量法测定金的影响因素探讨[J].黄金,2009,30(11):57-59.