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Seven EPA Methods on One Column Pair Using a micro-ECD

Analyze Pesticides, PCBs, Herbicides and More on a Single Rtx-CLPesticides Column Set

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Analyze Pesticides, PCBs, Herbicides and More on a Single Rtx-CLPesticides Column Set, Using a micro-ECD and Dual Column Analysis

Get fast separations without sacrificing resolution by using Restek’s proprietary Rtx-CLPesticides and Rtx-CLPesticides2 columns for multiple environmental methods. Instead of changing columns between GC-ECD methods, you can save time by analyzing chlorinated pesticides, PCBs, herbicides, and other halogenated compounds on a single column set using dual column analysis and an Agilent micro-ECD. As shown here, Rtx-CLPesticides and Rtx-CLPesticides2 columns have a unique selectivity and are ideal for multiple GC-ECD methods. Compare them to your current column set and you’ll see the Restek advantage!

Rtx-CLPesticides columns offer the best overall performance for organochlorine pesticides analysis, as well as many other dual column analysis GC-ECD methods (0.32 mm ID columns).

 

Method Compound List Column Pair Analysis Time (min) Coelutions Restek Advantage
8081B
(Organochlorine pesticides analysis)		 Rtx-CLPesticides /
Rtx-CLPesticides2		 7 / 7 0 / 0
  • Increase sample throughput with 7 min analyses and baseline resolution.
Competitor A
column 1 / column 2		 7 / 8 0 / 1
Competitor B
column 1 / column 2		 10 / 9 0 / 0
 
8081B (extended)(Organochlorine pesticides analysis) Rtx-CLPesticides /
Rtx-CLPesticides2		 24 / 23 1 / 2
  • Best balance of speed and selectivity.
  • All compounds are resolved on at least one column.
Competitor A
column 1 / column 2		 27 / 29 0 / 3
Competitor B
column 1 / column 2		 NDP / 16 NDP / 3
 
8082A
(Polychlorinated biphenyls [PCBs], Aroclors analysis)		 Rtx-CLPesticides /
Rtx-CLPesticides2		 7 / 7 n/a
  • Fast PCB analysis times.
Competitor A
column 1 / column 2		 6 / 7 n/a
Competitor B
column 1 / column 2		 24 / 21 n/a
 
8151A
(Chlorinated herbicides analysis)		 Rtx-CLPesticides /
Rtx-CLPesticides2		 13 / 13 1 / 0
  • More elution order changes improve confidence in confirmational results.
Competitor A
column 1 / column 2		 13 / 13 0 / 0
Competitor B
column 1 / column 2		 16 / 15 1 / 1
 
504.1
(EDB, DBCP, TCP analysis)		 Rtx-CLPesticides /
Rtx-CLPesticides2		 6 / 6 0 / 0
  • Reliably separate analytes from trihalomethane interferences.
Competitor A
column 1 / column 2		 6 / 6 0 / 0
Competitor B
column 1 / column 2		 NDP NDP
 
505
(Organohalide pesticides analysis)		 Rtx-CLPesticides /
Rtx-CLPesticides2		 18 / 18.5 1 / 1
  • All compounds resolved on at least one column.
Competitor A
column 1 / column 2		 14 / 14 0 / 1
Competitor B
column 1 / column 2		 35 / 36 1 / 2
 
508.1
(Chlorinated pesticides, herbicides, organohalides analysis)


 Competitor A
column 1 / column 2		 21 / 23 0 / 3
  • Good balance of speed and resolution.
Competitor A
column 1 / column 2		 21 / 23 0 / 3
Competitor B
column 1 / column 2		 18 / 17 2 / 4
 
552.2
(Haloacetic acids, dalapon analysis)


 Rtx-CLPesticides /
Rtx-CLPesticides2		 12 / 12 0 / 0
  • No coelutions—get accurate results for compounds that coelute on other columns.
Competitor A
column 1 / column 2		 8 / 9 1 / 1
Competitor B
column 1 / column 2		 NDP / 10 NDP / 1

Comparison based on published competitor data. All columns tested were 0.32 mm ID. NDP = no data published.

NOTE: Analyzing dirty or derivatized samples can contaminate your column. Restek does not recommend analyzing trace-level pesticide samples following derivatized samples (e.g., Methods 8151A and 552.2) without first performing inlet maintenance. Standard steps include trimming the guard column and changing the inlet liner, seal, O-ring, and septum.

EVSS1013F-UNV