References
1. The Effect of the Autosampler Vial’s Glass Surface on
GC-MS Analysis of Pyrethroid Pesticides at ppb Levels:
Brian W King and Anila I Khan. Thermo Fisher
Scientific, Runcorn, UK. Poster Reference number
PSCCS 0512 588.
2. Ullmann's Encyclopedia of Industrial Chemistry,
Bernard H. W. S. De Jong, Ruud G. C. Beerkens, Peter
A. van Nijnatten, Eric Le Bourhis: Glass, 1.
Fundamentals, Published Online: 15 OCT 2011, DOI:
10.1002/14356007.a12_365.pub3, Wiley-VCH Verlag
GmbH & Co. KGaA, Copyright © 2002 by Wiley-VCH
Verlag GmbH & Co. KGaA
3. ISO 719:1985 Glass – Hydrolytic resistance of glass
grains at 98 degrees C – Method of test and
classification.
AN20642_E 10/12S
Application Note 20642
thermoscientific.com/crc
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Conclusion
• Studies showed plastic and high purity clear neutral
borosilicate glass vials reduce adsorption of pyrethroids
at lower concentrations.
• The linearity and recovery of the pyrethroids was
improved by the use of polypropylene vials but at the
risk of absorbed material being introduced into the GC.
• The best results were obtained using a high purity 33
expansion clear glass vial with low surface activity,
which gave higher sample recovery compared to the
polypropylene vial.
• The SPE-GC/MS method demonstrated high recovery
for 0.10 ng/mL of pyrethroids in water.
• The GC/MS method was found to be linear over the
range of 50 to 2000 ng/mL.
• The HyperSep C18 silica SPE cartridge allowed the
extraction and preconcentration of pyrethroids in water
for quantification.
