US EPA Method 524.2 with the Tekmar Lumin P&T Concentrator, AQUATek LVA and Agilent 7890B GC/5977A MS
US EPA Method 524.2 was used to determine the concentration of volatile organic compounds (VOCs) in drinking water. The Teledyne Tekmar Lumin purge and trap (P&T) concentrator, along with an AQUATek LVA (liquid vial autosampler) and Agilent 7890B GC/5977A MS was used to create a working linear calibration curve and method detection limits (MDLs) for target compounds. This study will demonstrate the ability of the Lumin P&T concentrator with AQUATek LVA to process drinking water samples for VOC analysis according to US EPA Method 524.2.
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. While US EPA Method 524.2 is effective at concentrating trace levels of VOCs, it can also transfer a significant amount of water vapor to the Gas Chromatograph/Mass Spectrometer (GC/MS) due to the four-minute desorb time recommendation. By pairing the AQUATek LVA with the Lumin PTC’s innovative moisture control system (MCS), water vapor removal is improved by as much as 60%, thereby reducing peak interference and increasing GC column life span. 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.
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