土壤成分分析标准物质的研制  

Development of standard material for soil composition analysis

作　　者：张春艳 陈桂淋 杨葳 ZHANG Chun-Yan;CHEN Gui-Lin;YANG Wei(Centre Testing International Group Co.,Ltd.,Shenzhen 518101,China;Dalian Huaxin Physical and Chemical Analysis Center Co.,Ltd.,Dalian 116000,China)

机构地区：[1]华测检测认证集团股份有限公司,深圳518101 [2]大连华信理化检测中心有限公司,大连116000

出　　处：《实验室检测》2024年第11期25-28,共4页Laboratory Testing

摘　　要：目的制备耕地土壤标准物质用于农业土壤检测的过程质控,以便更好地保证测试结果数据的准确性和可靠性。方法采集的候选物样品经干燥、破碎、研磨、混匀、分装等步骤制备而成,采用F检验法进行均匀性检验,考察了候选物在持续时间18个月以上储存条件下的长期稳定性和模拟运输条件的短期稳定性,邀请10家长期承担土壤标准物质定值实验室合作定值,采用多种测试方法和目前先进可靠的测试手段,对样品中铜、镍进行了测试、定值,以算术平均值作为指定值,最终合成不确定度。结果所研制的土壤成分分析标准物质均匀性良好、进行了18个月的稳定性监测,通过计算评估有效期为5年,定值项目全面量值准确,不确定度评估合理,全铜的相对扩展不确定度为6.5%,总镍的相对扩展不确定度为6.7%,优于相近浓度的其他相同等级的土壤国家标准物质。结论该标准物质应用范围广,可用于农业、林业、环境、地球化学等多领域的土壤成分分析测试样品质量监控。Objective To prepare cultivated soil standard material for agricultural soil testing process to ensure that the test process is closer to the actual test samples.Methods The candidate samples prepared by drying,crushing,grinding,mixing,packing,using the F test uniformity test,examined the long-term stability of the candidate in storage for more than 18 months and short-term stability of simulated transportation conditions,invited 10 long undertake the soil standard material value laboratory cooperation value,using a variety of test methods and the current advanced and reliable test methods,copper and nickel test,the sample with the average as the specified value,the final synthesis uncertainty.Results Developed by soil composition analysis standard material uniformity is good,for 18 months of stability monitoring,through the calculation evaluation for 5 years,the fixed value project comprehensive accurate,reasonable uncertainty assessment,the relative extension of copper uncertainty is 6.5%,the relative uncertainty of total nickel is 6.7%,better than similar concentration of other same grade of soil national standard material.Conclusion The standard material is widely used and can be used for soil composition analysis in agriculture,forestry,environment and geochemistry.

关 键 词：土壤 成分分析 标准物质研制 

分 类 号：S151.9[农业科学—土壤学]