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ProductListing
References
1.Kaufamn,D.D.,Kearney,P.C.,Herbicides,Vol. 1,
Chemistry,
Degradation, andModeof Action
, 2
nd
Edition,MarcelDekker, Inc.,
NewYorkandBasel.
2.USEPA,
OrganicChemical Analysis ofMunicipal and Industrial
Wastewater
;Method 615, “Determination of ChlorinatedHerbicides
in Industrial andMunicipalWastewater.”
3.USEPA, SW-846
TestMethods forEvaluatingSolidWaste
, 3
rd
Edition, Final Update 1;Method 8150A, “ChloronatedHerbicides
byGasChromatography.”
Universal “Y” Press-Tight
®
Connectors
cat.# 20405 (ea.)
cat.# 20406 (3-pk.)
Universal Angled “Y” Press-Tight
®
Connectors
cat.# 20403 (ea.)
cat.# 20404 (3-pk.)
Phenylmethyl Deactivated Guard Columns
ID
length
cat.#
0.25mm
5m
10043
0.32mm
5m
10044
0.53mm
5m
10045
Rtx
®
-CLPesticides2 Column
ID df (µm)
temp. limits
15-Meter 30-Meter
0.25mm
0.20 -60 to 310/330°C 11320
11323
0.32mm
0.25 -60 to 310/330°C 11321
11324
0.53mm
0.42 -60 to 310/330°C 11337
11340
Rtx
®
-CLPesticides Column
ID df (µm)
temp. limits
15-Meter 30-Meter
0.25mm
0.25 -60 to 310/330°C 11120
11123
0.32mm
0.50 -60 to 310/330°C 11136
11139
0.53mm
0.50 -60 to 310/330°C 11137
11140
For a complete listingofAnalyticalReferenceMaterials andSamplePreparationProducts forEPA
Methods 515, 8150, and8151, seeRestek’sProductGuide, visit theweb site (
),
or call 800-356-1688, 814-353-1300, or your local Restek representative for information.
analysis.Methylation increasesherbicidevolatilityandover-
comesmatrix interferencesofherbicidesextracted from soil.
Despite thisderivatization step, analysts still canexperience the
problems of poor resolution,matrix interference, andpeak
misidentification.
This analysis has beenperformedon anumber of differentGC
column stationaryphases,manyofwhich suffer from slow
analysis time, low thermal stability, orcoelutions. Inaddition,
many laboratoriesperform thisanalysiswith thesame instrument
used for chlorinatedpesticide analysis (USEPA8081). TheRtx
®
-
CLPesticides andRtx
®
-CLPesticides2columnsprovideunsur-
passed separationof pesticides andherbicides,whileallowing
high-temperatureoperation to facilitate the removalofcontami-
nants from the systembyprogramming to300°Cor higher.
Figure 1 shows the separationof themethod8151 target
compounds on theRtx
®
-CLPesticides and theRtx
®
-
CLPesticides2 columns for simultaneous confirmation. These
columnswere connected using a glass “Y” connector (cat. #
20403) and a 5m guard column (cat. # 10044) installed into a
single injectionport. The injectionportwas configuredwith a
direct injection liner (cat. #20335),which improves the inertness
and sample transferof a splitless injection.
In summary, by configuringyour instrument as described and
using theRtx
®
-CLPesticides andRtx
®
-CLPesticides2 columns,
the separation of the chlorophenoxy herbicides canbe obtained
on both columns simultaneously. The surrogates are not shown in
these chromatograms becausemany laboratories use avarietyof
compounds as surrogates and internal standards for this analysis.
The common compounds (1,4-dichlorobenzene, DCAA, and
4,4'-dibromooctafluorobiphenyl) are baseline resolvedonbothof
these columns, soyoumayuse either of themwithout compro-
mising thechromatography.This same instrument configuration is
alsooptimal for theanalysisof chlorinatedpesticides andPCBs.
