ASTM D5904

ASTM D5904 is a technical standard for measuring total carbon, inorganic carbon, and organic carbon in water using ultraviolet, persulfate oxidation, and membrane conductivity detection. It provides a structured approach for carbon analysis where accurate differentiation between carbon forms is important. This matters for laboratories and quality programs that need dependable water testing results, consistent reporting, and a recognized ASTM method to support routine evaluation and compliance-related decisions.

ASTM D5904 standard overview

ASTM D5904 describes a test method focused on carbon determination in water by combining ultraviolet and persulfate oxidation with membrane conductivity detection. The method is designed to address total carbon as well as inorganic and organic carbon components, making it useful when a clearer carbon profile is needed rather than a single total measurement alone. As an ASTM standard, it gives users a defined technical framework that supports repeatable testing practices and more consistent laboratory output.

Where is ASTM D5904 used?

This standard is commonly used in water testing workflows where laboratories need to evaluate carbon content with a controlled analytical method. It may be applied in environmental, industrial, or quality control settings that handle water samples and require documentation of total carbon, inorganic carbon, and organic carbon. ASTM D5904 is especially relevant for analytical instruments and lab procedures that rely on oxidation-based carbon measurement and conductivity detection.

Practical importance of ASTM D5904

ASTM D5904 helps support consistent carbon testing by giving laboratories a recognized procedure for measuring carbon fractions in water. That can improve comparability between results, support procurement and specification checks, and reduce uncertainty in routine analysis. For organizations that depend on carbon data for monitoring, validation, or product evaluation, the standard can be an important reference for quality control and compliance-oriented testing.

• Total, inorganic, and organic carbon
• Water sample analysis
• Ultraviolet and persulfate oxidation
• Membrane conductivity detection
• Laboratory testing consistency