PREPARATION OF CERTIFIED REFERENCE MATERIAL FOR PEARL RIVER DELTA SEDIMENT
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摘要: 为满足近海地球化学调查及资源勘探的需要，研制了3个珠江三角洲沉积物标准物质.样品经干燥、球磨至200目，采用XRF法进行均匀性检验，结果显示方差检验的F实测值均小于列表临界值，证明样品具有较好的均匀性.在2年时间内选取有代表性的元素进行了4次稳定性测试，结果表明样品稳定性良好.共12家实验室参加了合作定值，采用了16种准确可靠的分析方法，最终定值元素70项.该标准物质的研制将为河口三角洲地区地质调查提供可靠的质量保证.Abstract: To meet the needs of offshore geochemical survey and resources exploration, three reference materials (RM) of the Pearl River Delta sediment are prepared. Being dried and ground into 74 μm, the sample is proved to have good homogeneity by XRF method. The variance test shows the measured F values are less than critical values. Four stability tests on representative elements within two years indicate that the samples have good stability. Twelve laboratories and sixteen reliable analytical methods are involved in the study to finally obtain the certified values of seventy elements. The preparation of standard materials can provide reliable quality assurance for geological survey in estuarine delta areas.
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Key words:
- Pearl River Delta /
- reference material /
- homogeneity test /
- stability test /
- certified value
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