Shimadzu Guide to US EPA Methods 524.3 and 524.4 for Analysis of Volatile Organic Compounds in Drinking Water

Introduction

Due to advances in analytical instrumentation the United States Environmental Protection Agency (US EPA) introduced a new drinking water method in June 2009. US EPA Method 524.31 allows laboratories to modify purge and trap and GCMS conditions in order to accommodate instrumental advances and shorten sample preparation time. The US EPA also investigated the option of using nitrogen as the purge gas in an additional drinking water method, US EPA Method 524.42 . This application note will compare analytical results when using helium and nitrogen purge gases.

June 22, 2015 GMT