小体积萃取-石墨炉原子吸收法测定高纯硝酸钡中纳克级重金属元素
The Determination of Nanogram Amounts of Heavy Metal Elements in Highly Pure Barium Nitrate by Extraction-GFAAS
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摘要: 本文研究了石墨炉原子吸收光谱法测定高纯硝酸钡中超痕量重金属元素的分析技术。提出在大量钡基体存在时,采用小体积萃取体系APDC-MIBK同时萃取纳克级的Fe、Cu、Co和Ni。该法具有灵敏度高、无干扰、操作方便和减少沾污等特点。方法检出限为:Fe 7.2ng/g、Cu 12.8ng/g、Co 4.4ng/g和Ni 6.7ng/g。应用于红外光纤原料硝酸钡、硝酸铝中痕量重金属的测定,效果良好。Abstract: The determination of ultra-trace heavy metal elements in pure barium nitrate by graphite furnace atomic absorption spectrometry is reported. An APDC/M1BK extraction for the nanogram amounts of Fe, Cu, Co and Ni in barium salt is simultaneous performed in
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