Schlecht P C, Shulman S A
Am Ind Hyg Assoc J. 1986 May;47(5):259-69. doi: 10.1080/15298668691389748.
Asbestos fiber counting data reported in the NIOSH Proficiency Analytical Testing (PAT) Program are used in this study to evaluate the analytical performance of participating laboratories and to determine if overall performance has improved during a ten-year period. PAT laboratories have achieved intralaboratory precision of 0.18 to 0.28 relative standard deviation (RSD), and interlaboratory precision of 0.33 to 0.44 RSD. In addition, there was higher variability between PAT laboratories from 1974 to 1978, when the program underwent considerable change and growth than the variability found during previous or subsequent time periods. The improvements in interlaboratory precision by approximately one-third since 1974 and the tendency of laboratories with little PAT experience to have poorer interlaboratory precision than more experienced laboratories raises a concern that interlaboratory precision may deteriorate as large numbers of new laboratories start to enroll in the PAT Program with the increased emphasis on asbestos removal in public buildings.
本研究使用了美国国家职业安全与健康研究所（NIOSH）能力验证分析测试（PAT）项目中报告的石棉纤维计数数据，以评估参与实验室的分析性能，并确定在十年期间整体性能是否有所提高。PAT实验室实现了0.18至0.28相对标准偏差（RSD）的实验室内精密度，以及0.33至0.44 RSD的实验室间精密度。此外，1974年至1978年期间，该项目经历了重大变革和发展，PAT实验室之间的变异性高于之前或之后时间段的变异性。自1974年以来，实验室间精密度提高了约三分之一，且PAT经验较少的实验室往往比经验更丰富的实验室具有更差的实验室间精密度，这引发了人们的担忧，即随着大量新实验室开始加入PAT项目，且公共建筑中石棉清除的重视程度增加，实验室间精密度可能会恶化。
