Full scan GC‐MS quantitation of pesticides in spring water at the 10 ppt level using large volume on‐column injection

Termonia, Arnaud; Termonia, M.

doi:10.1002/jhrc.1240200810

Cited by 11 publications

(3 citation statements)

References 2 publications

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“…This helps to increase sensitivity by a better use of the available volume of sample extract. Recent instrumental developments in GC/MS have allowed fully automated analyses to be performed while injecting several hundred microliters of sample extract, resulting in a technique that can routinely be applied to the analysis of low levels of pollutants from environmental matrixes. , It was, therefore, expected that the combination of the CLSA preconcentration technique and the new possibilities of large volume injections would result in a very sensitive and selective analysis method.…”

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confidence: 99%

Picogram Determination of “Earthy-Musty” Odorous Compounds in Water Using Modified Closed Loop Stripping Analysis and Large Volume Injection GC/MS

Malleret¹,

Bruchet²

2001

Anal. Chem.

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"Earthy-musty" off-flavor problems in water samples are due to organic compounds present at the sub-part-per-trillion level. Numerous analytical methods such as purge and trap, liquid/liquid extraction, and closed-loop stripping analysis (CLSA) followed by GC/MS analysis have been used to determine these compounds. However, these methods offer poor sensitivity (detection limits of approximately 1 to 10 ng/L) when compared to the 20-30 pg/L of sensorial sensitivity. The purpose of this study was to develop a new method involving a modified CLSA preconcentration technique together with large volume injection GC/MS in order to attain analytical sensitivity equal to or better than olfactory sensitivity. For eight target compounds that cause taste and odor problems in water at trace levels, the method developed was linear in the 0.05-10 ng/L range and provided recoveries greater than 70% together with satisfactory repeatability. Detection limits as low as 15-30 pg/L were achieved, representing a 50-fold improvement in sensitivity as compared to current methods. The accuracy and sensitivity of the method were demonstrated in different aqueous matrixes, including raw surface water. The method was successfully applied to earthy-musty water samples that had remained unsolved by conventional techniques, thus proving its effectiveness.

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confidence: 99%

Picogram Determination of “Earthy-Musty” Odorous Compounds in Water Using Modified Closed Loop Stripping Analysis and Large Volume Injection GC/MS

Malleret¹,

Bruchet²

2001

Anal. Chem.

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“…Pyrethroids and OCPs are usually determined by gas chromatographic (GC) techniques, using different detectors, such as electron capture detectors (ECD) [3,4] or mass spectrometry [3,[5][6][7]. However, Fourier transform Infrared (FTIR) spectrometry has gained wide acceptance in this field by virtue of its remarkable usefulness for both qualitative and quantitative analysis, but is limited by the high concentration of analyte required for detection.…”

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confidence: 99%

“…: samples (nos [1][2][3][4][5][6][7][8]. of 10 mL n-hexane solutions containing all possible ternary combinations of the three selected pesticides at two concentration levels; samples (nos.…”

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confidence: 99%

Assessment of ftir spectrometry for pesticide screening of aqueous samples

Columé

Diewok

Lendl

2004

International Journal of Environmental Analytical Chemistry

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This article assesses the potential of Fourier transform infrared spectrometry (FTIR) to be used in pesticide screening and determination of selected pyrethroid and organochlorine pesticides in fresh water. FTIR spectra of 28 single pesticides in the dry state were recorded on a horizontal diamond attenuated total reflection (ATR) element. Hierachical cluster analysis of the recorded FTIR spectra (spectral range: 4000-500 cm À1 ) showed that different pesticide groups could be distinguished. A representative of each main group (dichlofuanid, captan and fenpropathrin) was selected and their direct simultaneous determination in fresh water without using a chromatographic separation step investigated. The developed analysis procedure comprised a liquid-liquid extraction step with n-hexane, further automated clean-up and preconcentration by solidphase extraction using a silica mini-column and final elution of the analyte with ethyl acetate. The extract containing the analytes was further concentrated and dried on the ATR element for spectrum acquisition. Using a partial least square (PLS) calibration it could be shown that all three analytes could be quantified in fresh water in a concentration range from 1.2 to 4.8 mg/L. Recoveries for dichlofuanid, captan and fenpropathrin from fortified tap and river waters ranged from 66.3 to 102.0% (captan was the pesticide providing the lowest values, 66.3 and 70.3%).

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Methods of Analysis for Triazine Herbicides and Their Metabolites

McLaughlin

2008

The Triazine Herbicides

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Full scan GC‐MS quantitation of pesticides in spring water at the 10 ppt level using large volume on‐column injection

Cited by 11 publications

References 2 publications

Picogram Determination of “Earthy-Musty” Odorous Compounds in Water Using Modified Closed Loop Stripping Analysis and Large Volume Injection GC/MS

Picogram Determination of “Earthy-Musty” Odorous Compounds in Water Using Modified Closed Loop Stripping Analysis and Large Volume Injection GC/MS

Assessment of ftir spectrometry for pesticide screening of aqueous samples

Methods of Analysis for Triazine Herbicides and Their Metabolites

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