【引用本文】 曾江萍, 李小莉, 张楠, 等. 粉末压片制样-X射线荧光光谱法测定锂云母中的高含量氟[J]. 岩矿测试, 2019, 38(1): 71-76. doi: 10.15898/j.cnki.11-2131/td.201804060038
ZENG Jiang-ping , LI Xiao-li , ZHANG Nan , et al. Determination of High Concentration of Fluorine in Lithium Mica by X-ray Fluorescence Spectrometry with Pressed-Powder Pellets[J]. Rock and Mineral Analysis, 2019, 38(1): 71-76. doi: 10.15898/j.cnki.11-2131/td.201804060038

粉末压片制样-X射线荧光光谱法测定锂云母中的高含量氟

1. 中国地质调查局天津地质调查中心, 天津 300170;

2. 中国地质科学院地球物理地球化学勘查研究所, 河北 廊坊 065000

收稿日期: 2018-04-06  修回日期: 2018-07-30 

基金项目: 中国地质调查局地质调查项目(DD20160094)

作者简介: 曾江萍,硕士,高级工程师,主要从事光谱分析研究。E-mail:zengjiangping@163.com。。

Determination of High Concentration of Fluorine in Lithium Mica by X-ray Fluorescence Spectrometry with Pressed-Powder Pellets

1. Tianjin Center of Geological Survey, China Geological Survey, Tianjin 300170, China;

2. Institute of Geophysical and Geochemical Exploration, Chinese Academy of Geological Sciences, Langfang 065000, China

Received Date: 2018-04-06
Revised Date: 2018-07-30

摘要:锂云母中的氟含量很高(1.36%~8.71%),在焙烧锂云母矿物时锂的浸出率随着含氟量的增加而逐步下降,随着锂云母脱氟率的提高,锂的浸出率也相应提高,准确测定锂云母中的氟、控制氟含量可为确定焙烧过程的工艺条件、设备参数及成本提供依据。目前氟的测定主要采用离子选择电极法,但过程复杂、分析时间长且空白值高。本文采用粉末直接压片制样X射线荧光光谱法测定锂云母中的氟,氟的检出限为46±4μg/g。将锂矿石标准物质和人工配制校准物质制成工作曲线,经验系数校正基体效应和谱线干扰,方法精密度(RSD,n=10)为1.03%。采用本法分析由标准样品合成的样品,测定值与理论值吻合良好;用实际样品验证,测定结果与离子选择电极法的测定值相符。本法适用于分析锂云母中0.68%~9.14%的氟。

关键词: 锂云母, , 经验系数校正, 粉末压片, X射线荧光光谱法

Determination of High Concentration of Fluorine in Lithium Mica by X-ray Fluorescence Spectrometry with Pressed-Powder Pellets

KEY WORDS: lithium mica, fluorine, experience coefficient correction, pressed-powder pellets, X-ray Fluorescence Spectrometry

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粉末压片制样-X射线荧光光谱法测定锂云母中的高含量氟

曾江萍, 李小莉, 张楠, 王家松, 魏双, 王娜