石油及相关产品

[中文适用范围]： 本文件规定了统计方法，用于评估旨在测量相同材料特性的两种测试方法之间的预期一致性，并确定简单的线性偏差校正是否可以进一步改善预期一致性。本文件适用于测量多样品多实验室研究 (MSMLS) 得出的石油或石油产品定量特性的分析方法。这些类型的研究包括但不限于符合 ISO 4259-1 或同等要求的实验室间研究 (ILS) 和符合 ISO 4259-3 或同等要求的能力测试计划 (PTP)。本文件中规定的方法确定了两个结果之间的差异的极限值，其中每个结果由不同的操作员使用不同的仪器和两种方法 X 和 Y 在相同材料上获得。其中一种方法 (X 或 Y) 已根据本实践进行了适当的偏差校正，以与另一种方法一致。该极限被指定为方法间重现性。由于随机变化，在两种测试方法正确和正常运行的情况下，预计超过该值的概率为 5%。注：5.1 和 5.2 中给出了该方法的进一步应用条件。 [外文原描述]： This document specifies statistical methodology for assessing the expected agreement between two test methods that purport to measure the same property of a material, and for deciding if a simple linear bias correction can further improve the expected agreement. This document is applicable for analytical methods which measure quantitative properties of petroleum or petroleum products resulting from a multi-sample-multi-lab study (MSMLS). These types of studies include but are not limited to interlaboratory studies (ILS) meeting the requirements of ISO 4259 - 1 or equivalent, and proficiency testing programmes (PTP) meeting the requirements of ISO 4259 - 3 or equivalent. The methodology specified in this document establishes the limiting value for the difference between two results where each result is obtained by a different operator using different apparatus and two methods X and Y, respectively, on identical material. One of the methods (X or Y) has been appropriately bias-corrected to agree with the other in accordance with this practice. This limit is designated as the between-methods reproducibility. This value is expected to be exceeded with a probability of 5 % under the correct and normal operation of both test methods due to random variation. NOTE Further conditions for application of this methodology are given in 5.1 and 5.2 .