水质分析校准用锂溶液标准样品的研制

Development of the Certified Reference Material Used as a Calibration Standard of Lithium Solution

研究和制备了分析校准用锂溶液标准样品,用于环境监测和检测实验室的分析标准等相关用途。依据《标准样品工作导则》和《环境标准样品研复制技术规范》的技术要求,以经过纯度验证的高纯锂盐制备锂溶液标准样品,并对样話进行均匀性研究和稳定性考察。经检验,锂溶液标准样品均匀性良好,18个月内样品组分无显著性变化,稳定性良好;在实验室内用不同原理的检测方法对配制值进行验证,样品的量值与配制值一致性良好,标准值及扩展不确定度分别为500mg/L和±10mg/L,量值准确可靠。可用于实验室仪器校准、方法评价和质量监控等方面,满足环境监测及各行业检测实验室等领域相关分析测试的工作需求。

The certified reference material used as a calibration standard of lithium solution had been studied and prepared for environmental monitoring, and the testing of laboratory analysis standards etc. According to the technical requirements of Directives for the Work of Reference Materials and Technical Specifications for Development of Environmental Reference Materials, homogeneity study and stability review had been carried out on the samples. The lithium solution standard samples were prepared with high purity lithium salt, which had already passed the purity verification. The tests showed that the homogeneity of the lithium solution was in good conditions, and the constituents experienced no significant changes in 18 months, and the stability was fine. Testing methods of different principles were adopted in the laboratory to verify the preparation values, and the consistency between the measured value and preparation value of the samples was good. The certified value and expanded uncertainty were 500 mg/L and ± 10 mg/L respectively, the measured values were correct and reliable. The solution was applicable to laboratory appliance calibration, method evaluation and quality monitoring, meeting the needs of the analysis and tests in environmental monitoring and the testing laboratories of various industries.