Drolc Andreja, Cotman Magda, Ros Milenko
National Institute of Chemistry, Hajdrihova 19, P.O. Box 660, 1000, Ljubljana, Slovenia.
Anal Bioanal Chem. 2005 Jul;382(5):1311-9. doi: 10.1007/s00216-005-3264-7. Epub 2005 May 20.
Measurement traceability is universally recognised as one of the basic prerequisites for comparability of results obtained in different laboratories and is a basic aspect of metrological sciences such as analytical chemistry. This requirement is underscored by the increasing adoption of standards and measurement quality systems, such as laboratory accreditation against ISO/IEC 17025. Testing laboratories ensure traceability of their measurement results by using appropriate reference standards for calibration of instruments and control of measurement processes. For routine work in the field of water analysis, these standards are usually commercial solutions or in-house solutions prepared from "pure" products. Therefore, laboratories should demonstrate that their use of reference standards is appropriate and sufficient, which can be done by participation in an appropriate proficiency-testing scheme. The paper reports how measurement traceability of results from field laboratories (nitrite nitrogen, nitrate nitrogen, chloride and sulphate; all in water) can be demonstrated by participation in a proficiency-testing scheme based on reference values.
测量可追溯性被普遍认为是在不同实验室获得的结果具有可比性的基本前提条件之一，并且是分析化学等计量科学的一个基本方面。诸如依据ISO/IEC 17025进行实验室认可等标准和测量质量体系的日益采用，凸显了这一要求。检测实验室通过使用适当的参考标准来校准仪器和控制测量过程，以确保其测量结果的可追溯性。对于水分析领域的常规工作，这些标准通常是商业溶液或由“纯”产品制备的内部溶液。因此，实验室应证明其对参考标准的使用是恰当且充分的，这可通过参加适当的能力验证计划来实现。本文报告了通过参加基于参考值的能力验证计划，如何证明现场实验室（水中的亚硝酸盐氮、硝酸盐氮、氯化物和硫酸盐）结果的测量可追溯性。
