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标样的测试不同于一般例行分析,是一项技术要求很高的研究工作.为了确保分析质量,提供尽可能接近真值的分析数据,测试前应慎重地选择分析方法,并对样品处理、称量误差、试剂纯度、被测组分的允许误差范围、所报分析数据的有效数字的位数、数据修约的原则以及百分总和的控制等若干技术问题做出统一的规定.标样测试的关键是选好分析方法,为了保证测试数据准确可靠,应选用准确度和精密度都很好的方法,由技术熟练的人员进行测试,并且要选用两种以上的方法加以对照,相互验证.若用同一方法,则应由不同分析人员进行测试,对选定的方法必要时应根据标样的组成、各组分的含量、共存元素的干扰情况等进行试验并使每一分析步骤对被测组分尽量避免引入误差,即便是万分之几的误差也不可忽视,对测试中的疑难问题应及时交流经验,必要时应组织技术攻关予以解决.铬铁矿、超基性岩标样的测试项目有24-25个,采用的分析方法共计86种,除氧化亚铁因受现行分析方法所限只采用一种方法外,其余各项目的测试方法最少有两种,多至七种,参加测试单位最少有八个,最多十五个.
In order to ensure the quality of the analysis and to provide the analytical data as close as possible to the true value, the standard test should be chosen carefully before the test and the samples should be processed , Weighing error, reagent purity, the allowable error range of the tested components, the number of significant figures reported in the analysis data, the principle of data reduction and the percentage of total control and other technical issues to make uniform provisions. The key to the sample test is to choose the analytical method. In order to ensure the test data to be accurate and reliable, the method with good accuracy and precision should be selected and tested by skilled personnel. Two or more methods should be used to compare with each other If the same method, it should be tested by different analysts, if necessary, the selected method should be based on the composition of the sample, the content of each component, the interference of co-existence of elements and other tests and make each analysis step Try to avoid the introduction of the measured components of the error, even a few thousandths of error can not be ignored, the test of the problems should be timely exchange of experience, if necessary, should organize The key to solve the problem.Chromite, ultramafic rock standard test items are 24-25, using a total of 86 kinds of analytical methods, except for the limited by the current analytical methods of ferrous oxide only one method, The remaining items of the test methods at least two, up to seven, to participate in the test unit at least eight, up to fifteen.