ASTM D7773

ASTM D7773 is the ASTM standard for determining volatile inorganic acids, specifically HCl, HBr, and HNO3, using filter sampling and suppressed ion chromatography. It provides a structured approach for collecting airborne acid species and analyzing them with a chromatographic method suited to trace-level measurement. This standard matters because it supports more consistent testing, better comparison of results, and more reliable evaluation of volatile inorganic acid exposure or process emissions.

ASTM D7773 standard overview

The ASTM D7773 standard focuses on a sampling-and-analysis method for volatile inorganic acids using filter collection followed by suppressed ion chromatography. Its technical context is centered on identifying and measuring hydrogen chloride, hydrogen bromide, and nitric acid in a controlled way. As a technical document, it helps define a repeatable laboratory workflow that can support quality control, compliance activities, and consistent reporting. The standard is especially useful when analytical uniformity and method traceability are important.

Where is ASTM D7773 used?

This standard is commonly used in settings where volatile inorganic acid species need to be collected from air or process environments and then analyzed in the laboratory. It is relevant to workflows that rely on filter sampling, chromatographic instrumentation, and controlled sample preparation. ASTM D7773 may be used by testing laboratories, environmental monitoring teams, and facilities evaluating acid-related emissions or workplace conditions. It is also useful wherever HCl, HBr, or HNO3 measurement needs a documented and repeatable method.

Practical importance of ASTM D7773

ASTM D7773 helps users apply a recognized method for measuring specific volatile inorganic acids with greater consistency. That can improve comparability between test runs, support procurement and specification checks, and reduce uncertainty in analytical reporting. For organizations involved in monitoring, compliance, or product evaluation, the standard provides a practical framework for sampling and ion chromatography analysis. Using a defined ASTM standard can also help reduce method variation and support more defensible results.

• Filter sampling for volatile inorganic acids
• Suppressed ion chromatography analysis
• Targets HCl, HBr, and HNO3
• Supports repeatable analytical workflows
• Useful for compliance and quality control