ASTM D7622

ASTM D7622 is the standard test method for measuring total mercury in crude oil using combustion and direct cold vapor atomic absorption with Zeeman background correction. It is designed to support consistent mercury determination in a difficult hydrocarbon matrix, where accurate trace analysis can be important for handling, quality control, and downstream processing decisions. By defining a structured laboratory approach, this ASTM standard helps users apply a repeatable method for evaluating total mercury levels with greater confidence.

ASTM D7622 standard overview

The official title of ASTM D7622 identifies a test method focused on total mercury measurement in crude oil. The method combines combustion with direct cold vapor atomic absorption and Zeeman background correction, which indicates an analytical approach intended to improve measurement reliability in a complex sample. As a technical document, it provides a standardized framework for laboratories that need a controlled procedure for mercury analysis. ASTM D7622 is therefore relevant to users seeking a recognized method for crude oil testing and results that are more suitable for comparison and reporting.

Where is ASTM D7622 used?

This standard is commonly used in laboratory and quality assurance settings that handle crude oil testing. It is especially relevant where mercury content must be monitored before refining, shipping, blending, or other processing activities. The method may be used by analytical labs, inspection groups, and petroleum quality control teams that need a recognized procedure for total mercury determination. ASTM D7622 supports workflows where reliable trace-element testing is important for operational planning and product evaluation.

Practical importance of ASTM D7622

In practice, ASTM D7622 helps support consistent mercury testing by giving laboratories a defined method for analysis. That matters because mercury in crude oil can affect compliance decisions, equipment considerations, and downstream handling requirements. A standardized test method also helps reduce ambiguity when results are compared across sites, suppliers, or contracts. For organizations involved in procurement or quality control, ASTM D7622 can be an important reference for confirming analytical expectations and supporting risk-aware decision-making.

• Total mercury in crude oil
• Combustion-based test method
• Cold vapor atomic absorption
• Zeeman background correction
• Laboratory quality control and reporting