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Advanced GC-MS/MS techniques with multiple reaction monitoring provide
a platform for low-level pesticide analysis by delivering good specifi city and selectivity in complex matrices.
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Table top footprint with 200 x 200 mm or 400 x 400 mm addressable XY-space
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The sewage samples exhibited similar interferences in EI/MS/MS but to a lesser extent. For example, deltamethrin-spiked sewage showed some el- evation in baseline but gave a similar response to the calibration standard.
Conclusion The increasing use of pyrethroids has highlighted the importance of en- vironmental monitoring, particularly since these compounds have been found in even secondary-treated municipal wastewater and biosolids. Due to the toxic nature of pyrethroids and resulting environmental im- pact, low reporting limits in water and soil samples is required. However, this demands robust and sensitive instruments and methods. Advanced GC-MS/MS techniques with multiple reaction monitoring provide a plat- form for low-level pesticide analysis by delivering good specifi city and selectivity in complex matrices. It has also proved important to evaluate the ionization technique alongside the matrix to deliver enhanced perfor- mance. In this case, NCI combined with MS/MS clearly provides the best results for most pyrethroids in the matrices studied.
References 1.
http://epa.gov/oppsrrd1/reevaluation/pyrethroids-pyrethrins.html;
http://www.waterboards.ca.gov/water_issues/programs/swamp/ docs/cwt/guidance/3722.pdf (use in 2004 double that of in 1992).
2. Markle, J.C.; van Buuren, B.H. et al. Pyrethroid pesticides in municipal wastewater: a baseline survey of publicly owned treatment works facilities in California in 2013;
http://www.tritac.org/documents/ Pyrethroid-pesticides-in-municipal-wastewater_012214.pdf.
3. Hladkik, M.L.; Smalling, K.L. et al. Methods of analysis—determina- tion of pyrethroid insecticides in water and sediment using gas chro- matography/mass spectrometry;
http://pubs.usgs.gov/tm/tm5c2/ tm5c2.pdf.
Joe Anacleto is vice president, Applied Markets, Bruker Daltonics, 40 Manning Rd., Manning Park, Billerica, Mass. 01821, U.S.A.; tel.: 905-691-2724; e-mail:
joe.anacleto@
bruker.com;
www.bruker.com
Adjustable deck size, up to 1000 mm. For multi-step operations.
· Capping · Weighing · Synthesis
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Dispense and pour solids
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Extractions Spectroscopy
Precision Temperature Controllers KEM-Net software
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* GLP/GMP * Multi-temp ramps * Real-time graphics
· 0.1o C regulation of any volume from
10 ml to 100 L.
· < 1o C overshoot of the setpoint
· Custom & high safety controllers.
· Cellular phone and SMS message alarm
systems. J-KEM Scientific, Inc. AMERICAN LABORATORY • 27 • MARCH 2015
info@jkem.com www.jkem.com (800) 827-4849
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