UOP 276-85 is the technical reference for Pyrrole Nitrogen in Petroleum Distillates by Visible Spectrophotometry, a laboratory method used to evaluate pyrrole-type nitrogen in petroleum distillate samples. For buyers reviewing analytical standards, this method is relevant when nitrogen-related quality information is needed for product characterization, refinery control, or technical documentation. UOP 276-85 supports consistent laboratory assessment with a defined visible spectrophotometric approach, helping analysts and quality teams compare results across sample sets and maintain a clear testing record for distillate streams.

UOP 276-85 method scope

This UOP test method focuses on the measurement of pyrrole nitrogen in petroleum distillates using visible spectrophotometry. It is best viewed as an analytical chemistry method for laboratory evaluation of a specific nitrogen form within distillate materials. In practice, it may be selected when a refinery or testing laboratory needs a controlled way to assess nitrogen-related characteristics in light petroleum fractions. The scope is narrow and technical, making UOP 276-85 suitable for method selection, documentation review, and quality-oriented sample analysis.

Where is UOP 276-85 used?

UOP 276-85 is commonly used in petroleum laboratories, refinery QA/QC programs, and technical review workflows where distillate sample analysis is part of routine or investigational testing. It may be relevant to laboratory analysts, analytical chemists, refinery quality specialists, and petroleum technical teams responsible for product evaluation. Because the method addresses pyrrole nitrogen in petroleum distillates, it can support decisions tied to sample characterization, process monitoring, and internal specification review. Organizations handling distillate testing often rely on this type of method to keep laboratory practice aligned with documented standards.

Why professionals use UOP 276-85

Professionals use UOP 276-85 to obtain a defined, reproducible measure of pyrrole nitrogen that can be compared across samples, reports, and internal quality records. For teams working in refinery or laboratory settings, the method helps support analytical clarity and consistent documentation when nitrogen-related information matters to product evaluation. It can also aid technical reviewers who need a recognized test method for interpreting distillate data. As a result, UOP 276-85 is useful for day-to-day quality control, comparison work, and method-based decision support.

• Pyrrole nitrogen evaluation
• Petroleum distillate analysis
• Visible spectrophotometry method
• Refinery QA/QC support
• Laboratory and technical review use
• Standardized analytical documentation