Split Injection Minimizes Endrin and DDT Breakdown for GC-ECD Analysis of Organochlorine Pesticides

In my recent post, Fast Organochlorine Pesticide Analysis Using Hydrogen Carrier Gas with Split Injection GC-ECD, I asked readers to name one big Advantage I left unmentioned for doing split injection for organochlorine pesticide analysis ala EPA Method 8081.  I’m happy to say that Jason Hoisington of SGS quickly responded that split injection would minimize Endrin and DDT breakdown.  Although great improvements in GC inlet liner and glass wool deactivation since 8081b was published have allowed analysts to keep breakdown percentages well below the method specification of 15% when starting their sample analyses by splitless injection, dirty samples can quickly compromise the liner and lead to rapidly increasing breakdown.  The beauty of split injection though is that residence time in the inlet is so short, especially when column flow and split ratio are high, that system uptime as determined by the 8081b Endrin and DDT breakdown criteria can be extended. 

Take advantage of hydrogen carrier gas with split injection using a Precision liner and an Rtx-CLPesticides GC column to lower your overall cost per sample analysis by increasing throughput and uptime.