Ellutia's new buyers' guide explains how gas chromatography is used to measure liquid petroleum gas composition

For laboratories and quality managers involved in liquid petroleum gas (LPG) import, storage, blending or distribution, getting composition wrong carries real consequences — specification disputes, rejected cargoes, or product that doesn't perform as expected in the field. A new buyers' guide from Ellutia explains how gas chromatography is used to measure LPG composition accurately and consistently throughout the supply chain.

The LPG Composition Testing by Gas Chromatography — Buyers' Guide is designed for anyone evaluating or operating GC systems for LPG analysis, from laboratory managers selecting new instrumentation to quality teams looking to understand the measurement principles behind their existing workflows.

Inside the guide, readers will find:

• Where LPG composition analysis fits across the supply chain — from import terminals and storage facilities to distribution depots and cylinder filling operations
• The hydrocarbons routinely measured during LPG analysis, including propane, propene, isobutane, n-butane, butenes and pentanes
• Industry standards governing LPG testing, including ASTM D2163, ASTM D2598 and EN 589
• How LPG samples are introduced into a gas chromatograph as either liquid or vapour — and why the choice matters
• The main components of a GC system used for LPG composition measurement
• Practical considerations for laboratories evaluating or selecting an LPG GC system

The guide also covers how compositional data is used beyond pass/fail specification checks. Measured hydrocarbon distributions can be used to calculate physical properties such as density and vapour pressure — calculations described in standards such as ASTM D2598 — making accurate GC measurement central to blending decisions and product quality sign-off.

Sampling is addressed in detail, including how liquid sampling valves and vapour sampling systems are used in practice, and how the right approach depends on the operating conditions and hardware at a given facility.

Download the LPG Composition Testing Buyers' Guide at https://content.ellutia.com/lpg-analysis-guide and find out how gas chromatography supports LPG quality control from import to delivery.