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D5847-22 – Standard Test Method Technical Guide
📜 Scope and Objectives of QC Specifications
This practice provides specific, mandatory requirements for incorporating quality control (QC) procedures into all test methods under the jurisdiction of Committee D19. The primary goals are to enable users to demonstrate minimum competency in method performance by comparison with collaborative study data and to ensure ongoing competency through a minimum level of QC as part of proper implementation.
The practice is applicable primarily to quantitative chemical test methods for water analysis. It may not be suitable for all test methods; in such cases, compelling reasons must be documented and approved by Committee D19. The requirements may vary depending on the type of test method, analyte, and sample matrix.
⚙️ Mandatory QC Requirements and Implementation
Effective July 29, 1998, every D19 Standard Test Method must contain a QC section in full compliance with this practice. New collaborative study designs must include a QC section as part of the method to be tested, with approval from the Results Advisor. Older validated methods based on earlier versions of Practice D2777 must incorporate a QC section using historical data when balloted for reapproval or revision without necessarily requiring a new collaborative study.
Key requirements include documentation of any deviations from specific QC points, with approval from the D19 Results Advisor and the Executive Subcommittee Technical Operations section. The introduction of QC sections into older methods shall not be construed as a requirement for a new collaborative study.
📊 Key Quality Control Metrics and Data
The QC section in test methods should include information from collaborative studies for precision and bias. While specific metrics are not detailed in this practice, the focus is on ensuring comparability with established data. For older methods, best available historical information is used.
Users are expected to perform a minimum level of QC to demonstrate ongoing competency, which may include analysis of reference materials, duplicates, and control samples as specified in the individual test methods. The practice emphasizes that additional QC requirements may be implemented for desired data quality.
| 📅 Method Category | 🗓️ Deadline | 📋 Requirements |
|---|---|---|
| New or revised D19 methods | By July 29, 1998 | Must include QC section in full compliance |
| New collaborative studies | As of July 29, 1998 | Must include QC section; Results Advisor approval needed |
| Older validated methods | At next reapproval or revision | QC section based on historical information |
| 🎯 Goal | 📘 Description |
|---|---|
| Goal 1 | Users demonstrate minimum competency in test method performance by comparison with collaborative study data |
| Goal 2 | Users perform a minimum level of QC as part of proper implementation to ensure ongoing competency |
💡 Tip: When deviating from specific QC requirements, ensure that compelling reasons are documented and approved by Committee D19 to maintain compliance.
⚠️ Warning: Older validated methods may not require new collaborative studies for QC section introduction, but historical data must be utilized to the extent possible.
❓ Frequently Asked Questions
🔍 Why is a QC section mandatory for D19 test methods?
To ensure minimum competency and ongoing performance validation through comparison with collaborative study data.
💡 What should be done if QC requirements are not applicable to a specific test method?
Document the compelling reasons and obtain approval from Committee D19 via the Results Advisor and Executive Subcommittee.
⚡ How are older validated methods handled regarding QC?
They must include a QC section based on historical information when balloted for reapproval or revision, without necessarily requiring a new collaborative study.
📌 What is the role of collaborative studies in QC specifications?
Collaborative studies provide precision and bias data that form the basis for QC sections in test methods.