UOP 953-13 is the UOP method for measuring sulfate and thiosulfate in caustic aqueous solutions by ion chromatography. For laboratories that need to evaluate ionic contaminants in alkaline process samples, this method helps define what is present and supports consistent reporting across sites or test runs. It is a practical fit for refinery and petrochemical quality work where caustic solution control matters to process performance, material balance, and sample review. UOP 953-13 gives technical teams a focused analytical reference for comparing results and documenting routine laboratory findings.

UOP 953-13 analytical scope

This UOP chromatography method is centered on the analytical determination of sulfate and thiosulfate in caustic aqueous matrices. Its scope is best understood as a targeted laboratory measurement method for ionic species that may affect solution quality or process interpretation. By using ion chromatography, UOP 953-13 supports separation and identification of the relevant anions in a controlled analytical workflow. That makes it useful for laboratories that need a defined, repeatable approach to sample characterization, result comparison, and method-based reporting in caustic solution testing.

Where is UOP 953-13 used?

UOP 953-13 is commonly used in refinery laboratories, analytical chemistry groups, and quality control teams that handle caustic aqueous samples. It may also be relevant to technical reviewers and product quality specialists who assess process chemicals, treatment solutions, or related plant samples. In practice, the method supports laboratory analysis where sulfate and thiosulfate need to be checked in a consistent way for operational review or documentation. For teams responsible for sample evaluation and reporting, it provides a clear technical basis for comparing results across routine testing programs.

Why labs rely on UOP 953-13

Labs rely on UOP 953-13 because a defined chromatography method improves consistency when measuring key anions in caustic solutions. It helps reduce ambiguity in daily testing, supports clearer interpretation of sample condition, and gives QA/QC teams a common reference for product and process review. For organizations that depend on reliable laboratory data, the method can improve comparability between analysts, instruments, and locations. That makes it valuable for routine quality verification, technical documentation, and decision support in caustic solution analysis.

• Ion chromatography for caustic aqueous samples
• Targets sulfate and thiosulfate measurement
• Supports refinery and petrochemical lab workflows
• Useful for QA/QC and analytical review teams
• Helps with consistent sample characterization
• Technical reference for routine reporting