UOP 391-91 is a practical reference for laboratories that need to evaluate trace metals in petroleum products or organics by AAS. Based on the official method title, it supports analytical measurement of low-level metal content in samples where contamination, product quality, or process influence may need to be reviewed. For buyers comparing UOP standards, this method is relevant when trace metals data is needed for refinery QA/QC, product characterization, or technical reporting. UOP 391-91 helps laboratory teams apply a consistent analytical approach to metals-focused sample evaluation.

UOP 391-91 analytical scope

This UOP Trace Metals Method is centered on laboratory determination of trace metals using atomic absorption spectroscopy. It is intended for analytical chemistry work where the metal content of petroleum products or organic materials must be examined with control and repeatability in mind. UOP 391-91 is typically selected when a lab needs a method-aligned framework for detecting or comparing low-level metals in routine sample review, quality checks, or investigative testing. Its value lies in supporting a focused, standardized trace metals analysis workflow.

Where is UOP 391-91 used?

UOP 391-91 is commonly used in refinery laboratories, petroleum testing facilities, and other technical environments that handle product evaluation and trace metals review. Analytical chemists, laboratory analysts, QA/QC specialists, and technical reviewers may rely on it when metals data is needed for incoming material checks, process monitoring, or product comparison. It is also relevant for teams assessing organics or petroleum samples where trace metallic contamination may affect performance, specification review, or downstream processing decisions.

Why labs rely on UOP 391-91

Labs rely on UOP 391-91 because trace metals results often support important decisions about product consistency, contamination screening, and technical acceptance. A clear, recognized method helps teams compare results across batches, maintain laboratory discipline, and document findings in a way that fits refinery and petroleum workflows. For organizations that depend on dependable analytical data, the method provides a practical reference for metals-focused testing and internal reporting. UOP 391-91 is especially useful when traceability and method alignment matter in day-to-day sample review.

• Trace metals analysis by AAS
• Petroleum products and organic samples
• Refinery laboratory and QA/QC use
• Contamination and composition review
• Analytical support for technical reporting
• Suitable for lab comparison workflows