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标准物质是一种或多种足够均匀、很好的被确定了特性值的物质,在基层实验室常作为参照物用于检测样品、质量控制和方法的确认,具有量值溯源的功能,分为有证和非有证两类。《实验室资质认定评审准则》规定:当需要利用期间核查以保持设备校准状态的可信度时,应按照规定的程序进行。实验室应1次或多次使用适当的技术和方法检查在用的标准物质。主要的核查方法有购买标准物质(或标准质控样品)或采用质控图核查标准物质[1-2]。
A standard substance is one or more substances that have a sufficiently uniform and well-defined property value. They are often used as reference materials in grassroots laboratories for the detection of samples, quality control and validation of methods, and have the function of traceability There are two types of certificates and non-certified. “Laboratory Accreditation Criteria” provides: When the need for verification during the use of equipment to maintain the credibility of the calibration state, should be in accordance with the prescribed procedures. The laboratory should use one or more times using appropriate techniques and methods to check the standard reference material. The main verification methods include the purchase of standard materials (or standard quality control samples) or the use of quality control chart verification standards [1-2].