UOP 915-92 PDF

Full title and description

St UOP 915-92 — "Normal Paraffins by Capillary Gas Chromatography": a UOP test method for determination of carbon-number distribution and quantification of normal (n-) paraffins in paraffin products and concentrates using capillary gas chromatography. The method specifies sample preparation, chromatographic conditions, calibration and result reporting for n‑paraffin analysis.

Abstract

This standard describes a capillary GC procedure to separate and quantify normal paraffins (reporting carbon-number distribution and total normal paraffin content) in paraffin fractions and products. It is intended for quality control and specification testing of normal‑paraffin products where accurate carbon‑number profiling (e.g., C10–C13) is required.

General information

• Status: Active (available from standards document repositories and translation vendors).
• Publication date: Designation indicates 1992 edition (915-92); document listing shows publication/release metadata 29 July 2002 (repository record).
• Publisher: UOP / Universal Oil Products (UOP) — American technical standard publisher for refinery and hydrocarbon analytical methods.
• ICS / categories: Petroleum and related technologies — relevant ICS groups include 75.080 (Petroleum products in general), 75.140 (Waxes and other petroleum products) and 75.160.20 (Liquid fuels / related test methods).
• Edition / version: Original method indicated by the "‑92" suffix (1992). Some document distributors show a 2002 publication record for the electronic/compiled version.
• Number of pages: ~10 pages (standard test method document).

Scope

Provides a capillary gas chromatography procedure for separating and measuring normal paraffins in paraffin products and concentrates. The method covers sample introduction, column selection and temperature programming, detector/response considerations, calibration with n‑paraffin standards and calculation/reporting of carbon‑number distribution and total normal paraffin content. It is intended for laboratory quality control and specification testing of n‑paraffin products.

Key topics and requirements

• Scope and applicability: targeted at normal (straight‑chain) paraffin analysis and carbon‑number profiling.
• Sample preparation: guidance for representative sampling and, where required, dilution/cleanup prior to GC analysis.
• Chromatographic conditions: specification of capillary column types (non‑polar phases typical), carrier gas, oven program and detector settings for resolution of n‑paraffin homologues.
• Calibration and standards: use of n‑paraffin calibration mixtures and response-factor determination to convert peak areas to weight‑percent carbon‑number distribution.
• Reporting and limits: results reported as carbon‑number distribution (wt% per carbon number) and total normal paraffin content; precision and method limitations noted (e.g., not suitable for reliable quantification of branched/cyclic hydrocarbons without modification).
• Quality control: recommendations for system suitability, blank checks and periodic standard checks to ensure accuracy and repeatability.

Typical use and users

Used by refinery and petrochemical laboratories, wax and specialty paraffin producers, analytical service labs, and quality control/QA personnel responsible for product specification and release. Typical applications include specification verification for normal‑paraffin product grades, incoming material inspection, and R&D where carbon‑number distribution is required.

Related standards

Companion UOP methods in the 9xx series (nearby method numbers such as UOP 913‑92 and UOP 914‑92) and other petroleum analytical standards covering GC separations, paraffin specifications and related tests are commonly used together in paraffin product QA/QC. Document repositories and collections of UOP methods list these adjacent methods as related references.

Keywords

UOP 915-92; St UOP 915-92; normal paraffins; n‑paraffin; capillary gas chromatography; carbon‑number distribution; paraffin specification; paraffin analysis; petroleum laboratory methods.

FAQ

Q: What is this standard?

A: It is a UOP laboratory test method (designation 915‑92) describing a capillary gas chromatography procedure for determination of normal paraffins and their carbon‑number distribution in paraffin products.

Q: What does it cover?

A: The method covers sample handling, chromatographic conditions (capillary column, oven program, carrier gas), calibration with n‑paraffin standards, calculation of carbon‑number distribution and reporting of total normal paraffin content. It is focused on straight‑chain paraffins rather than branched or cyclic species.

Q: Who typically uses it?

A: Refinery and petrochemical laboratories, wax and paraffin manufacturers, third‑party analytical labs and QA/QC teams that need accurate carbon‑number profiles and paraffin content for product specification and quality control.

Q: Is it current or superseded?

A: Document listings indicate the method as available/active in standards repositories and vendor collections; however, the method designation (915‑92) indicates origination in 1992 and some distributors list a 2002 publication record for their electronic copy. Users should confirm the current authoritative status and any revisions directly with UOP or an authorized standards provider before relying on it for regulatory or contractual compliance.

Q: Is it part of a series?

A: Yes — it is part of the UOP suite of analytical test methods (9xx series) for hydrocarbon and catalyst/product analysis; related UOP methods (e.g., UOP 913‑92, UOP 914‑92 and neighboring numbers) are often used in conjunction.

Q: What are the key keywords?

A: Normal paraffins; n‑paraffin; capillary GC; carbon‑number distribution; UOP method; paraffin specification; petroleum laboratory test.