ASTM D6331

ASTM D6331 is a standard test method for determining the mass concentration of particulate matter from stationary sources at low concentrations using a manual gravimetric method. It provides a structured way to measure particulate emissions where accurate low-level sampling and weighing are important. For facilities, laboratories, and compliance-focused teams, this ASTM standard supports more consistent results, better data comparability, and a clearer basis for evaluating stack or exhaust emissions.

What is ASTM D6331?

ASTM D6331 defines a manual gravimetric test method for measuring the mass concentration of particulate matter from stationary sources at low concentrations. In practical terms, it describes a laboratory and field-based approach for collecting particulates and determining mass by weighing, rather than by indirect estimation. The standard is useful when low-level particulate measurements need a repeatable, technically recognized method. ASTM D6331 helps establish a common framework for sampling and analysis tied to particulate emissions from stationary sources.

Where is ASTM D6331 used?

This standard is commonly used in settings that evaluate particulate emissions from stationary sources, such as stacks, ducts, and other fixed exhaust systems. It is relevant where low particulate concentrations make careful manual gravimetric measurement important. Typical use may include emissions testing, verification work, and technical assessments carried out by environmental laboratories, plant operators, and third-party testing teams. ASTM D6331 is especially useful when a documented test method is needed for repeatable source monitoring.

Why is ASTM D6331 important?

ASTM D6331 matters because it gives organizations a recognized method for measuring low concentrations of particulate matter with consistency and traceability. That supports compliance efforts, test planning, and quality control when emission data must be dependable. It can also reduce uncertainty in procurement and evaluation activities by defining a standard approach to measurement. For teams responsible for stationary source testing, the method helps improve confidence in reported results and supports more informed technical decisions.

• Manual gravimetric particulate measurement
• Low-concentration stationary source testing
• Emissions monitoring and verification
• Repeatable sampling and weighing process
• Compliance-oriented test documentation