【引用本文】 肖细炼, 王亚夫, 张春林, 等. 交流电弧-光电直读发射光谱同时测定碳酸盐矿物中银硼锡的方法研究[J]. 岩矿测试, 2020, 39(5): 696-705. doi: 10.15898/j.cnki.11-2131/td.201908020116
XIAO Xi-lian , WANG Ya-fu , ZHANG Chun-lin , et al. Simultaneous Determination of Silver, Boron and Tin in Carbonate Minerals by Alternating Current-Arc Optoelectronic Direct Reading-Optical Spectrometry[J]. Rock and Mineral Analysis, 2020, 39(5): 696-705. doi: 10.15898/j.cnki.11-2131/td.201908020116

交流电弧-光电直读发射光谱同时测定碳酸盐矿物中银硼锡的方法研究

1. 中国地质调查局武汉地质调查中心, 湖北 武汉 430205;

2. 中南地质科技创新中心, 湖北 武汉 430205

收稿日期: 2019-08-02  修回日期: 2019-11-08 

基金项目: 中国地质调查局地质调查项目(121201009000150002)

作者简介: 肖细炼,硕士,工程师,主要从事地球化学分析方面的研究工作。E-mail:xiaoxilianezhou@126.com。。

Simultaneous Determination of Silver, Boron and Tin in Carbonate Minerals by Alternating Current-Arc Optoelectronic Direct Reading-Optical Spectrometry

1. Wuhan Center of China Geological Survey, China Geological Survey, Wuhan 430205, China;

2. Central South China Innovation Center for Geosciences, Wuhan 430205, China

Received Date: 2019-08-02
Revised Date: 2019-11-08

摘要:银硼锡元素的丰度和变化特征可以反映区域成矿条件,指示矿床或矿化存在。碳酸盐矿物中的银硼锡是勘查地球化学及多目标地球化学中的必测元素,其测定方法是地球化学元素配套分析方案中必不可少的方法之一。由于碳酸盐矿物与普通的岩石、土壤和水系沉积物不同,该类矿物主要是灰岩、白云岩等含钙和镁元素比较高的岩石类样品,同时测定样品中银硼锡的技术难点在于高含量钙镁基体会严重干扰低含量待测元素,且摄谱过程中由于易产生二氧化碳造成样品飞溅。针对碳酸盐矿物的特殊性,本文建立了交流电弧-光电直读发射光谱同时测定碳酸盐矿物中银硼锡的分析方法。通过优化样品前处理及实验条件,用10%的盐酸处理样品,消除了基体元素钙和镁的干扰;以锗(Ge)作为内标元素进行定量,可以消除因电弧激发条件变化以及试样基体组分等外部因素造成干扰的影响;采用银与长波锗元素组成分析线对,硼和锡与短波锗元素组成分析线对,灵敏度较好;选择天然碳酸盐岩石与人工合成灰岩等12种国家一级地球化学标准物质作为标准系列,使基体组分与样品相类似;采用分析线和内标线同时扣背景的离线差减法进行背景校正。结果表明:该方法对银硼锡的检出限分别为0.008、0.49、0.18μg/g;方法精密度(RSD)对银大于10%,其余均优于10%;经国家一级地球化学标准物质验证,银硼锡测定平均值与认定值的对数差值(△lgC)均小于或等于±0.05,满足多目标”电直读发射光谱法

关键词: , , , , , ,

Simultaneous Determination of Silver, Boron and Tin in Carbonate Minerals by Alternating Current-Arc Optoelectronic Direct Reading-Optical Spectrometry

KEY WORDS: carbonate minerals, silver, boron, tin, hydrochloric acid treatment, germanium, alternating current-arc optoelectronic direct reading-emission spectrometry

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交流电弧-光电直读发射光谱同时测定碳酸盐矿物中银硼锡的方法研究

肖细炼, 王亚夫, 张春林, 杨小丽