便携式锂钾分析仪在钾盐资源现场勘查中的应用
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引用本文:刘晓,袁继海,孙东阳,樊兴涛,詹秀春.2021.便携式锂钾分析仪在钾盐资源现场勘查中的应用[J].地球学报,42(4):573-578.
DOI:10.3975/cagsb.2020.103001
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作者单位E-mail
刘晓 国家地质实验测试中心 lx761609253@126.com 
袁继海 国家地质实验测试中心  
孙东阳 国家地质实验测试中心  
樊兴涛 国家地质实验测试中心  
詹秀春 国家地质实验测试中心 zhanxiuchun2012@126.com 
基金项目:国家重点研发计划项目(编号: 2016YFC0600605);基本科研业务费项目(编号: JYYWF20181701)
中文摘要:钾盐矿作为农业三大肥料中钾肥的主要原料, 是国家粮食安全的重要保障, 也是我国紧缺的七大宗矿产资源之一。当前可供开发利用的主要是可溶性钾盐资源, 现场勘探和开采急需相关仪器和快速分析技术的支持。项目组采用自主研发的便携式锂钾分析仪, 在对钻探钾盐样品采用超声波技术进行消解的基础上, 选择K的分析谱线波长为766.49 nm, 建立了测定钾盐样品中水溶性K的快速分析方法, 并在钻探现场得到示范应用。在最佳工作条件下测得K的检出限为9.0 μg/L, 方法的精密度(RSD)<2%。对钾盐样品进行加标回收实验, 加标回收率均在94.5%~106.7%范围内。钾盐现场分析结果与实验室ICP-AES测量结果的一致性良好, 现场快速分析方法的准确度高, 可满足地质调查和资源勘查的要求, 为实时指导钾盐资源现场勘查与开采提供了科学信息与技术支撑。
中文关键词:便携式  锂钾分析仪  钾盐  现场分析
 
On-site Application of Portable Li-K Analyzer in the Exploration of Potash Resources
Abstract:Sylvine, as the main raw material of potash fertilizer among the three major agricultural fertilizers, is an important guarantee for national food security and one of the seven scarce bulk strategic mineral resources in China. Currently, soluble potash resources are mainly available for exploitation and utilization. It is urgent to support on-site exploration and exploitation by using relevant instruments and rapid analytical technology. On the basis of ultrasonic digestion of drilling potash samples, the wavelength of characteristic spectral line of K was set at 766.49 nm, and a rapid analytical method for determination of water soluble K in potassium salt samples was established by self-developed portable Li-K analyzer, which was demonstrated and applied in drilling site. Under the optimum operating conditions, the detection limit of K was 9.0 μg/L and the measured precision (RSD) was better than 2%. The standard addition recovery experiments of potassium salt samples were all within the range of 94.5%~106.7%. The on-site analytical results of potassium salt samples agreed well with those by laboratory ICP-AES measurements, which shows that the accuracy of rapid field analytical method is good and can meet the requirements of geological survey and resource exploration. This work has laid a practical foundation for real-time guidance of on-site exploration and exploitation of potassium salt resources by providing scientific information and technical support.
keywords:portable  Li-K analyzer  potassium salt  on-site analysis
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