ASTM D8272-19

4.2 Practice D2777, Section 1.1, states:

4.3 Practice D2777, Section 1.2, requires a task group proposing a new test method to carry out a collaborative study from which concentration limits, repeatability and reproducibility precision and bias statements are developed.

4.4 Practice D2777, Section 4 (Summary of Practice), requires, a collaborative study only after the task group has assured itself that preliminary evaluation work is complete and the test method has been written in its final form.

4.5 Practice D2777, Section 5.2 (Significance and Use), requires the collaborative test corroborates the test method write up (preliminary evaluation) within the limits of the test design.

4.6 Practice D2777, Section 6 (Preliminary Studies), requires considerable pilot work on a test method should precede the determination of precision and bias (collaborative study). This pilot work evaluates such variables as:

4.7 Potentially significant factors are investigated in advance and are controlled in the written test method that is distributed for the collaborative test.

4.8 Only after the proposed test method has been thoroughly tried and proved and reduced to unequivocal written form should a collaborative test be conducted.

4.9 The Committee D19 test method is written in two steps:

4.10 This document is a guide to Committee D19 task groups developing chemical test methods.

1.1 This guide identifies procedures for use in developing and optimizing new or modified Subcommitees D19.05 and D19.06 test methods intended for regulatory compliance reporting in EPA drinking water and wastewater programs. This guide may also be useful for developing test methods for emerging contaminants that may not yet have regulatory requirements.

1.2 This guide also cites statistical procedures that are useful in the single laboratory characterization and optimization and in the inter-laboratory studies (ILSs).

1.3 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.

1.4 This guide offers an organized collection of information or a series of options and does not recommend a specific course of action. This document cannot replace education or experience and should be used in conjunction with professional judgment. Not all aspects of this guide may be applicable in all circumstances. This ASTM standard is not intended to represent or replace the standard of care by which the adequacy of a given professional service must be judged, nor should this document be applied without consideration of a project’s many unique aspects. The word “Standard” in the title of this document means only that the document has been approved through the ASTM consensus process.

1.5 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use.

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.