| 储阳磊,黄 勤,薛伟明.泡塑富集原子吸收法测定矿石中的金——泡塑的选择与实验条件的确定[J].甘肃地质,2026,35(3):88-93 |
| 泡塑富集原子吸收法测定矿石中的金——泡塑的选择与实验条件的确定 |
| DETERMINATION OF GOLD IN ORES BY POLYURETHANE FOAMENRICHMENT AND ATOMIC ABSORPTION SPECTROMETRY:FOAM SELECTION AND OPTIMIZATION OFEXPERIMENTAL CONDITIONS |
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| DOI： |
| 中文关键词: 泡塑富集 原子吸收光谱法 金矿石 实验条件 |
| 英文关键词:foam enrichment atomic absorption spectrometry gold ore experimental conditions |
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| 中文摘要: |
| 建立泡塑富集—火焰原子吸收光谱法测定矿石中金的分析方法，系统优化泡塑选型、预处理、吸附与解脱关键条件。 优选低密度高孔隙率聚氨酯泡塑为吸附材料，经 5% 盐酸溶液预处理 6 h，在 10% 王水酸度下振荡吸附 60 min，以 1% 硫脲溶液100 ℃沸水浴解脱 60 min，金回收率达 96. 4%。 该方法适配多种金矿石类型，相对偏差 < 5%；对国家一级标准物质 6 次平行测定，相对标准偏差 ≤ 4. 58%，准确度与精密度满足地质检测规范。 方法流程简、效率高、适用性广，可替代传统火试金与活性炭吸附法，满足批量矿石中金的快速、稳定检测需求。 |
| 英文摘要: |
| An analytical method for the determination of gold in ores was established using polyurethane foam enrichment coupled with flame atomic absorption spectrometry. Key experimental conditions, including foam type, pretreatment, adsorption and desorption were systematically optimized. Low-density and high -porosity polyurethane foam was selected as the optimal adsorbent. The optimal conditions were determined as follows: pretreatment with 5% hydrochloric acid for 6 hours, oscillating adsorption for 60 minutes in 10% aqua regia, and desorption with 1% thiourea in a boiling water bath at 100 ℃ for 60 min. Under these conditions, the gold recovery reached 96. 4%. The method is applicable to various types of gold ores, with relative deviations below
5% . Six replicate determinations of national primary reference materials yielded a relative standard deviation （RSD） of ≤ 4. 58%, and both accuracy and precision met the requirements of geological testing specifications.With its simple procedure, high efficiency, and broad applicability, the method can replace traditional fire assayand activated carbon adsorption methods, meeting the demand for rapid and stable determination of gold in batch ore samples. |
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