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USEPA Method 524.4 Using the Teledyne Tekmar Atomx and Thermo Scientific GC/MS System with New Helium Saver Module
Courtesy of Teledyne Tekmar
Abstract
Increasing concerns over the availability of helium, and its rising cost, has led the United States Environmental Protection Agency (USEPA) to update drinking water Method 524 to USEPA Method 524.4. This new method affords environmental laboratories increased Purge and Trap (P&T) parameter flexibility and permits the use of nitrogen as a sample purge gas.
For this application note, a Teledyne Tekmar Atomx Automated VOC Sample Prep System was configured with nitrogen sample purge gas and connected to a Thermo Scientific TRACE 1310 gas chromatograph (GC) and ISQ LT mass spectrometer (GCMS) system equipped with the newly released Thermo Scientific Instant Connect Helium Saver Module.
This cost-efficient configuration effectively minimized helium consumption and met the calibration curve, Minimum Reporting Level (MRL), precision and accuracy, and Initial Demonstration of Capability (IDC), requirements of USEPA Method 524.41
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