Standard Guide for Determination of Precision and Bias of Methods of Committee D22
Standard Guide for Determination of Precision and Bias of Methods of Committee D22
SIGNIFICANCE AND USE 5.1 The objective of this standard is to provide guidelines to Committee D22 for the evaluation of the precision and bias, or both, of ASTM standard methods and practices at the time of their development. Such an evaluation is necessary to assure that a cross section of interested laboratories could perform the test and achieve satisfactory results, using the method as written. It also provides guidance to the user as to what levels of precision and accuracy may be expected in such usage. 5.2 The write-up of the method describes the media for which the test method is believed to be appropriate. The collaborative test corroborates the write-up within the limitations of the test design. A collaborative test can only use representative media so that universal applicability cannot be implied from the results. 5.3 The fundamental assumption of the collaborative test is that the media tested, the concentrations used, and the participating laboratories are representative and provide a fair evaluation of the scope and applicability of the test method as written. SCOPE 1.1 This standard provides guidance to task groups of Committee D22 on Sampling and Analysis of Atmospheres in planning and conducting collaborative testing of candidate methods. 1.2 It is intended for use with other ASTM practices for the determination of precision and bias. 1.3 It is applicable to most manual and automated methods and to most components of monitoring systems. It is recognized that the evaluation of monitoring systems may provide special problems. Practice D3249 should be considered for general guidance in this respect. 1.4 It is directly applicable to chemical methods and in principle to most physical methods, sampling methods, and calibration procedures. 1.5 The processes described are for the general validation of methods of test. A user has the obligation and responsibility to validate any method it uses for a specific application and to demonstrate its own competence in the use of validated methods. 1.6 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
ASTM D3670-91(2022), titled Standard Guide for Determination of Precision and Bias of Methods of Committee D22, provides essential guidelines for evaluating the precision and bias of analytical methods related to the sampling and analysis of atmospheres. Developed by ASTM International, this standard specifically supports the work of Committee D22, which focuses on air quality. By following this guide, organizations and laboratories can ensure that their test methods yield reliable and reproducible results across a range of atmospheric matrices and laboratory settings.
The standard is applicable to both manual and automated methods and covers most components of monitoring systems, ensuring robust validation practices are implemented. It is especially relevant for the early development stages of ASTM standard methods, providing a framework for collaborative testing and interlaboratory studies, thus fostering confidence in the comparability and accuracy of results.
ASTM D3670-91(2022) finds practical use throughout the environmental and industrial sectors where atmospheric sampling and analysis are critical. It is especially valuable for:
Другие стандарты ASTM
For comprehensive method validation and performance assessment, the following related ASTM standards provide additional guidance:
These referenced standards are instrumental in supporting the requirements and recommendations in ASTM D3670-91(2022), ensuring alignment with best practices in analytical quality assurance.
Keywords: ASTM D3670, method validation, precision and bias, air analysis, collaborative testing, repeatability, reproducibility, Committee D22, standardization, laboratory quality assurance.