Determination of Trace Gold in Geochemical Samples by Flame Atomic Fluorescence Spectrometry with PUFP Separation and Enrichment

Yu-min SHEN; Zhi-ding LUO; Xiao-biao GUO; Gang WU; Chen-rong WANG; Ai-rui FU; Shu-lin GAO; Fan XIAO

doi:10.15898/j.cnki.11-2131/td.201809260108

2020 Vol. 39, No. 1

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Article navigation > Rock and Mineral Analysis > 2020 > 39(1): 127-134

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Yu-min SHEN, Zhi-ding LUO, Xiao-biao GUO, Gang WU, Chen-rong WANG, Ai-rui FU, Shu-lin GAO, Fan XIAO. Determination of Trace Gold in Geochemical Samples by Flame Atomic Fluorescence Spectrometry with PUFP Separation and Enrichment[J]. Rock and Mineral Analysis, 2020, 39(1): 127-134. doi: 10.15898/j.cnki.11-2131/td.201809260108

Citation:

Yu-min SHEN, Zhi-ding LUO, Xiao-biao GUO, Gang WU, Chen-rong WANG, Ai-rui FU, Shu-lin GAO, Fan XIAO. Determination of Trace Gold in Geochemical Samples by Flame Atomic Fluorescence Spectrometry with PUFP Separation and Enrichment[J]. Rock and Mineral Analysis, 2020, 39(1): 127-134. doi: 10.15898/j.cnki.11-2131/td.201809260108

Determination of Trace Gold in Geochemical Samples by Flame Atomic Fluorescence Spectrometry with PUFP Separation and Enrichment

1.
Hebei Research Center for Geoanalsis, Baoding 071052, China
2.
Beijing Gold-Suokun Technology Developing Co. LTD, Beijing 102600, China

More Information

Corresponding author: Fan XIAO, 168941141@qq.com

Received Date: 26 September 2018

Revised Date: 10 June 2019

Accepted Date: 21 October 2019

Abstract

Abstract

BACKGROUNDThe detection sensitivity, stability, and linear range of Au using flame atomic fluorescence spectrometry (FAFS) is comparable to the method of inductivity coupled plasma-mass spectrometry (ICP-MS). When Au concentration is below 0.5ng/g, it is difficult to accurately determine Au if the interference elements in FAFS are not separated and eliminated. OBJECTIVESTo optimize the conditions during determination of trace Au by FAFS method. METHODSThe optimized conditions for trace Au detection using FAFS were provided based on the conventional Au separation and enrichment method of polyurethane foam plastics (PUFP). Using the thiourea (3.0g/L) and HCl (1%) as desorption solution can effectively eliminate the Au memory effect after separation by PUFP with low Au background value (≤ 0.25ng/g), and 5μg/mL of Fe³⁺ solution added into Au standard solutions was used to eliminate the interference during Au detection using FAFS. RESULTSThe method was used to analyze national standard materials GBW07805, GBW07242, GBW07244a, GBW07245a and GBW07247, which yielded the relative error (RE) and relative standard deviation (RSD) of less than 4.7% and 23.2%, respectively. The Au contents for 90 primary halo samples and 4 monitor samples were analyzed simultaneously using FAFS and ICP-MS. Results showed that no significant differences existed between the two methods with F=1.23 and the correlation coefficient of 1.01, which further proved the accuracy and reliability of FAFS. CONCLUSIONSFAFS is simple, convenient, fast and practical. Method detection limit of Au is as low as 0.08ng/g, and the linear range (0.08-500ng/g) is three orders of magnitude.
- trace gold /
- flame atomic fluorescence spectrometry /
- thiourea-hydrochloric acid /
- matrix interference /
- memory effect

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References

[1]	Winefordner J D, Vickers T J.Atomic fluorescence spectrometry as a means of chemical analysis[J].Analytical Chemistry, 1964, 36(1):161-165. doi: 10.1021/ac60207a052 CrossRef Google Scholar
[2]	Demers D R, Allemand C D.Atomic fluorescence spectrometry with an inductively coupled plasma as atomization cell and pulsed hollow cathode lamps for excitation[J].Analytical Chemistry, 1981, 53(12):1915-1921. doi: 10.1021/ac00235a044 CrossRef Google Scholar
[3]	Montaser A, Fassel V A.Inductively coupled plasmas as atomization cells for atomic fluorescence spectrometry[J].Analytical Chemistry, 1976, 48(11):1490-1499. doi: 10.1021/ac50005a021 CrossRef Google Scholar
[4]	Weeks S J, Haraguchi H, Winefordner J D.Improvement of detection limits in laser-excited atomic fluorescence flame spectrometry[J].Analytical Chemistry, 1978, 50(2):360-368. doi: 10.1021/ac50024a047 CrossRef Google Scholar
[5]	Bolshov M A, Zybin A V, Smmirenkina I I.Atomic fluorescence spectrometry with laser excitation[J].Spectrochimica Acta, 1981, 36B(12):1143-1152. Google Scholar
[6]	李刚, 胡斯宪, 陈琳玲.原子荧光光谱分析技术的创新与发展[J].岩矿测试, 2013, 32(3):358-376. doi: 10.3969/j.issn.0254-5357.2013.03.003 CrossRef Google Scholar Li G, Hu S X, Chen L L.Innovation and development for atomic fluorescence spectrometry analysis[J].Rock and Mineral Analysis, 2013, 32(3):358-376. doi: 10.3969/j.issn.0254-5357.2013.03.003 CrossRef Google Scholar
[7]	《岩石矿物分析》编委会.岩石矿物分析(第四版第三分册)[M].北京:地质出版社, 2011:623-638. Google Scholar The Editorial Committee of Rock and Mineral Analysis.Rock and Mineral Analysis(The Fourth Edition:Volume Ⅲ)[M].Beijing:Geological Press, 2011:623-638. Google Scholar
[8]	刘向磊, 文田耀, 孙文军, 等.聚氨酯泡塑富集硫脲解脱-石墨炉原子吸收光谱法测定地质样品中金铂[J].岩矿测试, 2013, 32(4):576-580. doi: 10.3969/j.issn.0254-5357.2013.04.010 CrossRef Google Scholar Liu X L, Wen T Y, Sun W J, et al.Determination of Au and Pt in geological samples by graphite furnace atomic absorption spectrometry with concentrate and extraction by foam plastics and thiourea[J].Rock and Mineral Analysis, 2013, 32(4):576-580. doi: 10.3969/j.issn.0254-5357.2013.04.010 CrossRef Google Scholar
[9]	邢夏, 徐进力, 陈海杰, 等.抗坏血酸为基体改进剂石墨炉原子吸收光谱法测定金矿区植物样品中的痕量金[J].岩矿测试, 2015, 34(3):319-324. Google Scholar Xing X, Xu L J, Chen H J, et al.Determination of trace gold in plant samples from a gold mining mrea by graphite furnace atomic absorption spectrometry with ascorbic acid as the matrix modifier[J].Rock and Mineral Analysis, 2015, 34(3):319-324. Google Scholar
[10]	陈景伟, 李玉明, 宋双喜, 等.载炭泡塑吸附-电感耦合等离子体发射光谱测定金矿石的金量[J].岩矿测试, 2015, 34(3):314-318. Google Scholar Chen J W, Li Y M, Song S X, et al.Determination of gold in gold ores by inductively coupled plasma-optical emission spectrometry with carbon-loaded foam flastic adsorption[J].Rock and Mineral Analysis, 2015, 34(3):314-318. Google Scholar
[11]	魏轶, 窦向丽, 巨力佩, 等.四酸溶解-电感耦合等离子体发射光谱法测定金锑矿和锑矿石中的锑[J].岩矿测试, 2013, 32(5):715-718. doi: 10.3969/j.issn.0254-5357.2013.05.007 CrossRef Google Scholar Wei Y, Dou X L, Ju L P, et al.Determination of antimony in gold-antimony ore and antimony ore by inductively coupled plasma-atomic emission spectrometry with four acids dissolution[J].Rock and Mineral Analysis, 2013, 32(5):715-718. doi: 10.3969/j.issn.0254-5357.2013.05.007 CrossRef Google Scholar
[12]	张翼明, 张立锋, 周凯红.电感耦合等离子体质谱法测定硫化矿中金[J].冶金分析, 2014, 34(12):44-47. Google Scholar Zhang Y M, Zhang L F, Zhou K H.Determination of gold in sulphide ore by inductively coupled plasma mass spectrometry[J].Metallurgical Analysis, 2014, 34(12):44-47. Google Scholar
[13]	刘军, 闫红岭, 连文莉, 等.封闭溶矿-电感耦合等离子体质谱法测定地质样品中金银铂钯[J].冶金分析, 2016, 36(7):25-33. Google Scholar Liu J, Yan H L, Lian W L, et al.Determination of gold, silver, platinum and palladium in geological samples by inductively coupled plasma mass spectrometry with sealed dissolution[J].Metallurgical Analysis, 2016, 36(7):25-33. Google Scholar
[14]	蒋建华, 马重光, 陈方伦.化学光谱法测定超痕量的金[J].岩矿测试, 1982, 1(2):48-52. Google Scholar Jiang J H, Ma C G, Chen F L.Determination of ultratrace of gold by chemical spectrographic method[J].Rock and Mineral Analysis, 1982, 1(2):48-52. Google Scholar
[15]	谷晓霞, 郎存棵, 夏爱利.SK-800型原子荧光测金仪在黄金矿山的应用[J].黄金, 2002, 23(9):45-48. doi: 10.3969/j.issn.1001-1277.2002.09.013 CrossRef Google Scholar Gu X X, Lang C K, Xia A L.Application of SK-800 atom fluorescence spectrometric gold analyzer in gold mine[J].Gold, 2002, 23(9):45-48. doi: 10.3969/j.issn.1001-1277.2002.09.013 CrossRef Google Scholar
[16]	刘德林, 高树林, 黄炼.火焰-原子荧光光谱法测定微量金的研究[J].黄金, 2011, 32(6):53-56. doi: 10.3969/j.issn.1001-1277.2011.06.014 CrossRef Google Scholar Liu D L, Gao S L, Huang L.Study on detecting trace gold with flame atomic fluorescence spectrometry[J].Gold, 2011, 32(6):53-56. doi: 10.3969/j.issn.1001-1277.2011.06.014 CrossRef Google Scholar
[17]	熊昭春.聚氨酯泡沫塑料离富集之应用与进展综述[J].岩石矿物及测试, 1985, 4(4):278-283. Google Scholar Xiong Z C.A summary of applications of polyurethane foam in separation and preconcentration techniques[J].Rock and Mineral Analysis, 1985, 4(4):278-283. Google Scholar
[18]	任英, 张晶玉, 张佩勋.分光光度法测定矿石中痕量金的富集方法的研究Ⅰ.泡沫塑料静态吸附解脱金的研究[J].分析化学, 1991, 19(5):588-590. Google Scholar Ren Y, Zhang J Y, Zhang P X.Separation and preconcentration of trace gold in ores with polyurethane foam for spoctrophotometric determination Ⅰ.Studies on static adsorption and de-adsorption of gold[J].Chinese Journal of Analytical Chemistry, 1991, 19(5):588-590. Google Scholar