Analysis of 1,4-Dioxane in Drinking Water Using the Teledyne Tekmar Lumin P & T Concentrator, AQUATek LVA and Agilent 7890B GC/5977A MSD
Abstract
Drinking water analysis of Volatile Organic Compounds (VOCs) is normally performed by purge and trap (P&T) concentration, using standard US EPA methods. This application manipulates P&T and Gas Chromatograph/Mass Spectrometer (GC/MS) parameters to create an efficient method in order to detect 1,4-Dioxane at the part-per-billion level (ppb), despite its poor purge efficiency. This study uses a Teledyne Tekmar Lumin P&T concentrator with an AQUATek LVA liquid autosampler in conjunction with an Agilent 7890B Gas Chromatograph (GC)/5977A Mass Spectrometer (MS) in selected ion monitoring (SIM) mode to create a working linear calibration curve and method detection limits (MDLs) for 1,4-Dioxane.
Introduction
The AQUATek LVA is Teledyne Tekmar’s most advanced water-only P&T autosampler and is based on the proven Atomx XYZ platform. The AQUATek LVA includes whisper-quiet XYZ automation, two standard addition vessels and an optional pH meter. Combined with its 84-position chiller-enabled sample tray, the result is simple and reliable sample preparation and handling. In addition to other refinements, the AQUATek LVA incorporates a precision-machined valve manifold block to reduce potential leak sources and ensure the system is both reliable and robust. By pairing the AQUATek LVA with the Lumin’s innovative moisture control system (MCS), water vapor removed is improved by as much as 60%, thereby reducing peak interference and increasing GC column lifespan.
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Tekmar Lumin - Model PTC - Purge and Trap Concentrator
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