UOP 999-04 is a technical laboratory standard for Precision Statements in Methods, helping users understand how consistently a UOP test method performs. For buyers reviewing analytical documentation, this method matters because precision statements support method selection, comparison, and confidence in reported results. In petroleum and chemical testing environments, it can help teams judge whether a method is suitable for routine QC, product release support, or technical review. UOP 999-04 is therefore relevant anywhere measurement consistency and data credibility are important to laboratory decision-making.

What is UOP 999-04?

UOP 999-04 is a UOP Test Method focused on precision statements, which are used to describe the expected variability of a method under defined conditions. In practical terms, it supports the documentation that helps analysts and technical reviewers interpret test performance. This makes the standard useful as part of a method library, internal review package, or laboratory quality system. For organizations working with petroleum, refinery, or chemical analysis, it provides a structured reference for understanding how a method’s results should be viewed and compared.

Where is UOP 999-04 used?

UOP 999-04 is commonly used in laboratory and technical settings where method performance needs to be documented and reviewed. It may be relevant to refinery QA/QC teams, laboratory analysts, analytical chemists, and technical reviewers who rely on clear precision information when evaluating test methods. In petroleum and petrochemical environments, this kind of standard is often part of method qualification, internal procedure review, or result interpretation support. It is especially useful where consistent data reporting and method selection affect operational decisions or product assessment.

Why is UOP 999-04 important?

UOP 999-04 matters because precision statements help teams understand the reliability and expected spread of analytical results. That supports better comparison between laboratories, more confident review of testing data, and stronger documentation for quality systems. In day-to-day work, it can help reduce uncertainty when methods are applied to product evaluation, refinery testing, or technical reporting. For organizations that depend on reproducible laboratory results, this standard adds clarity to method performance and strengthens the basis for informed decisions.

• Precision statement reference
• Method performance documentation
• Laboratory quality support
• Result comparison guidance
• Refinery and QA/QC relevance
• Technical review utility