ASTM D7280
Standard Test Method for Quinoline-Insoluble (QI) Content of Tar and Pitch by Stainless Steel Crucible Filtration
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About This Item
ASTM D7280 is the standard for measuring quinoline-insoluble (QI) content in tar and pitch using stainless steel crucible filtration. It helps define a consistent laboratory approach for evaluating this specific insoluble fraction, which is often important in material characterization and quality checks. By focusing on a controlled filtration method, the standard supports repeatable results for users who need dependable data on tar and pitch products. ASTM D7280 is commonly used where precise testing and comparison are needed.
Purpose of ASTM D7280
The purpose of this ASTM standard is to provide a recognized test method for determining the quinoline-insoluble content of tar and pitch. The title indicates a filtration-based procedure using a stainless steel crucible, which suggests a practical laboratory method designed for repeatable handling of insoluble material. ASTM D7280 is intended to support consistent testing and reporting so that results can be compared across labs, shipments, or production batches with greater confidence.
Common use cases of ASTM D7280
This standard is commonly used in laboratory testing of tar and pitch materials when quinoline-insoluble content needs to be measured as part of product evaluation or incoming inspection. It may be applied in quality control workflows, specification verification, or comparative testing between lots. Because ASTM D7280 centers on a defined filtration method, it is useful where a controlled and repeatable test setup is needed to assess insoluble content in these carbonaceous materials.
Why ASTM D7280 matters
ASTM D7280 matters because a clear, standardized method helps reduce variability in test results and supports more reliable decisions about material quality. For procurement, compliance, and production testing, a recognized ASTM standard can improve confidence that quinoline-insoluble measurements are being generated consistently. This is especially valuable when evaluating tar and pitch materials where small differences in insoluble content may affect acceptance criteria, process control, or product performance.
- Quinoline-insoluble content measurement
- Tar and pitch testing
- Stainless steel crucible filtration
- Quality control and comparison testing
- Standardized laboratory reporting
- Publication Date: 2025-08-15
- Publisher: ASTM
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