UOP 549-81 is a laboratory method for determining sodium in petroleum distillates by flame emission using an atomic absorption spectrophotometer. It is relevant where sodium control or verification matters in distillate streams, helping technical teams assess sample quality and chemical cleanliness in a petroleum testing workflow. For buyers comparing analytical standards, this method offers a clear reference for instrumental measurement of sodium in distillate materials and supports consistent laboratory documentation. UOP 549-81 is typically of interest to analysts, refinery QA/QC personnel, and other professionals who need reliable sodium evaluation for product review or technical reporting.

Purpose of UOP 549-81

The purpose of UOP 549-81 is to provide a defined analytical approach for measuring sodium in petroleum distillates with flame emission on an atomic absorption spectrophotometer. As a UOP Test Method, it is intended to support controlled laboratory analysis rather than general screening. The method is useful when a refinery or laboratory needs a standardized way to evaluate sodium content in distillate samples and compare results across testing programs. This makes it a practical fit for analytical chemists, laboratory supervisors, and technical reviewers working with petroleum quality data.

Laboratory use of UOP 549-81

UOP 549-81 is commonly suited to petroleum laboratories and refinery quality control environments that handle distillate sample analysis. It may be used by laboratory analysts and QA/QC teams reviewing product cleanliness, composition control, or specification-related documentation for distillate streams. Because the method is built around instrumental measurement, it can also support internal test method selection and review in technical service or laboratory management functions. In practice, it helps standardize how sodium is assessed so teams can compare results with greater confidence across routine testing work.

Practical importance of UOP 549-81

The practical value of UOP 549-81 is its role in supporting consistent sodium measurement for petroleum distillates, which can be important for quality verification and technical decision-making. Reliable sodium data can help teams compare samples, track laboratory performance, and maintain clearer records for refinery or fuel testing programs. For organizations managing analytical workflows, a recognized UOP method also helps reduce ambiguity in reporting and method selection. UOP 549-81 is therefore relevant where precision, repeatability, and defensible laboratory documentation matter in day-to-day operations.

• Sodium measurement in petroleum distillates
• Flame emission with atomic absorption spectrophotometer
• Refinery laboratory and QA/QC use
• Analytical review for distillate sample quality
• Standardized technical documentation
• Relevant to laboratory analysts and review teams