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

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

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

7 EPA Methods on 1 Column Pair. Organochlorine Pesticides Analysis and Dual Column Analysis

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
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.
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)
Rtx-CLPesticides /
Rtx-CLPesticides2
23.5 / 24 2 / 2
  • 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