《黄金》杂志(月刊) 第38卷 总第395期
2017年01月 第01期
目次
分析测试
  • 直读发射光谱法测定银硼钼锡铅的载体缓冲剂研究……龙志武,李志雄,赵 刚,李克勇,邱宏喜
  • 摘 要:研究推荐以Al2O3K2S2O7SiO2BaCO3NaFSCaCO3Fe2O3为主要组分的载体缓冲剂,通过与地球化学样品中待测元素发生热化学反应生成氟化物、硫化物确保其蒸发浓集率,与样品基体生成难以挥发的硅铝酸盐降低其干扰程度。在此基础上建立了直读光谱快速测定AgBMoSnPb的单电极载体蒸馏法,采用国家一级标准物质校准工作曲线及分析结果的量值溯源,检出限分别为Ag 0.006 μg/gB 0.84 μg/gMo 0.08 μg/gSn 0.19 μg/gPb 0.59 μg/g,待测元素结果的精密度≤8.14 %、准确度≤0.089,满足多目标地球化学调查、生态地球化学评价等要求。
  • 关键词:直读发射光谱法;载体缓冲剂;单电极载体蒸馏法;地球化学样品;银;硼;钼;锡;铅

    Study on carrier buffer in the determination of Ag,B,Mo,Sn and Pb by direct reading emission spectrometry……Long Zhiwu,Li Zhixiong,Zhao Gang,Li Keyong,Qiu Hongxi

    AbstractCarrier buffer with Al2O3K2S2O7SiO2BaCO3NaFSCaCO3Fe2O3 as its main composition,as is recommended by the study,ensures the vaporization concentration of target elements by having thermochemical reactionwith them that produces fluoride and sulfide,and mitigates the interference of the sample matrix by reacting with it and producing aluminosilicate.Based on that,the experiment established single electrode distillation method with direct reading emission spectrometry rapidly determining Ag,B,Mo,Sn and Pb,uses national Grade Ⅰ national reference material to calibrate the working curve,and carried out tracibility of values.The method has a detection limit of 0.006μg/g for Ag,0.84 μg/g for B,0.08 μg/g for Mo,0.19 μg/g for Sn and 0.59 μg/g forPb,the precision of determination results is8.14 % and the accuracy0.089,meetingthe requirement of multi-target geochemical investigation and ecological geochemical evaluation.

    Keywords:direct reading emission spectrometry; carrier buffer; single electrode distillation;geochemical sample; Ag; B; Mo; Sn; Pb
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