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中国无机分析化学:2022,12(3):129-133
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火焰原子吸收光谱法测定炭末中银
刘芳美, 赖秋祥, 廖彬玲, 罗小兵, 吴彬
(紫金铜业有限公司)
Determination of silver in carbon powder by flame atomic absorption spectrometry
liufangmei, laiqiuxiang, liaobinling, luoxiaobing, wubin
(Zijin Copper Co., Ltd)
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投稿时间:2021-06-11    修订日期:2021-07-02
中文摘要: 炭末中银的准确测定对于其金属平衡和贸易结算具有重要意义。采用硝酸-硫酸体系除碳分解试样,在20%盐酸介质中,采用空气-乙炔火焰,以328.1nm作为测定波长,建立了火焰原子吸收光谱法(FAAS)测定炭末中银的方法。在最优的实验条件下,银质量浓度在0.30~3.00μg/mL范围内与其吸光度呈良好线性关系,相关系数为0.9999。方法检出限为0.004μg/mL,定量下限为0.013μg/mL。干扰试验表明,根据炭末中干扰元素含量,在载金炭国家标准物质中加入一定量的共存元素,共存元素不影响银量的测定。实验方法用于测定实际炭末样品中银,结果的相对标准偏差(RSD,n=7)为0.91%~3.4%,且结果与《GB∕T 29509.2-2013 载金炭化学分析方法 第2部分:银量的测定 火焰原子吸收光谱法》方法测定结果一致。按照实验方法测定了4个载金炭标准样品中银,结果与标准值吻合。准确度和精密度符合实际生产需求,可用于炭末中银的测定。
Abstract:The accurate determination of silver in carbon powder is of great significance for its metal balance and trade settlement. The sample was decomposed with nitric acid-sulfuric acid for decarbonizing. The determination method of silver in carbon powder by flame atomic absorption spectrometry (FAAS) was established with air-acetylene flame. The determination medium was 20% hydrochloric acid. The determination wavelengths was 328.1 nm. Under the optimal esperimental conditions, the mass concentration of silver in range of 0.30~3.00 μg/mL showed good linear relationship with the corresponding absorbance. The correlation coefficient was 0.9999. The limit of detection of this method for silver was 0.004 μg/mL. The limit of quantification was 0.013 μg/mL. According to the current situation of domestic, a certain amount of coexisting elements were added into certified reference materials of gold-loaded carbon for the interference tests. The interference tests showed that the coexisting elements had no interference with the determination of silver. The proposed method was applied to the determination of silver in carbon powder samples. The relative standard deviation (RSD, n=7) were between 0.91% and 3.4%. And the results of each sample are consistent with those of the national standard method of GB/T 29509.2-2013 methods for chemical analysis of gold-bearing carbon-part 2: determination of silver content by flame atomic absorption spectrometry. The contents of silver in four certified reference materials of gold-loaded carbon were determined according to the proposed method, and the found results were consistent with the certified values. The accuracy and precision of meet the actual production requirements. The proposed method can be used for the determination of silver in carbon powder.
文章编号:     中图分类号:    文献标志码:
基金项目:国家质量基础的共性技术研究与应用(2019YFF0217100)
引用文本:
刘芳美,赖秋祥,廖彬玲,罗小兵,吴彬.火焰原子吸收光谱法测定炭末中银[J].中国无机分析化学,2022,12(3):129-133.
liufangmei,laiqiuxiang,liaobinling,luoxiaobing,wubin.Determination of silver in carbon powder by flame atomic absorption spectrometry[J].Chinese Journal of Inorganic Analytical Chemistry,2022,12(3):129-133.

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