• Determination of Oxygenates and BTEX in Beverage Grade Carbon Dioxide by GC

Related stories


Determination of Oxygenates and BTEX in Beverage Grade Carbon Dioxide by GC

May 12 2022

The following gas chromatography (GC) method was developed for the simultaneous analysis of ppb levels of the oxygenates acetaldehyde, dimethyl ether (DME) and benzene, toluene, ethylene and xylene (BTEX) in beverage grade carbon dioxide by installing a second column to separate acetaldehyde and DME from the carbon dioxide and the BTEX. A four port switching valve was used for column selection.

This GC method was performed on a process analyser configured with a photoionisation detector which has a detection limit for BTEX with no preconcentration at < 0.5 ppb; acetaldehyde at <50 ppb and DME at < 20 ppb. The analysis was automated via a programmable logic controller (PLC) that controls the analyser (start, calibrate, send/print report). The embedded software operating system is Windows® 10 which utilises PeakWorks, a chromatography integration system for peak identification and quantification. Data was generated that yielded the following results:  <100 ppb (acetaldehyde), <50 ppb (dimethyl ether), and 5 ppb BTEX for a direct injection with no concentration of the sample. The analysis time for this multicomponent analysis was < 10 minutes. This system can be remotely operated.

Contact PID Analyzers to request a quotation or learn more.

More information online

Related stories

Digital Edition

Lab Asia 29.4 - August 2022

August 2022

In This Edition Chromatography - Automated Sample Preparation:The Missing Hyphen to Hypernation - New Low Volume Air Sampler for PFAS Analysis - Analytical Intelligence Starts with the Samp...

View all digital editions


ACS National Meeting & Expo, Fall 2022

Aug 21 2022 Chicago, IL, USA & Online


Aug 22 2022 Frankfurt, Germany

IMSC 2022

Aug 27 2022 Maastricht, Netherlands

EuCheMS Chemistry Congress

Aug 28 2022 Lisbon, Portugal

Medical Fair Asia 2022

Aug 31 2022 Singapore

View all events