Determination of dithiocarbamate pesticides in occupational hygiene sampling devices using the isooctane method and comparison with an automatic thermal desorption (ATD) method

Coldwell, Matthew; Pengelly, Ian; Rimmer, Duncan A.

doi:10.1016/s0021-9673(02)01771-5

Cited by 22 publications

(7 citation statements)

References 14 publications

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“…ATD-GC/MS is a fast, simple, and convenient method to analyze volatile compounds in flowers [ 15 ]. ATD-GC/MS has also been successfully applied to detection of pesticide residues [ 16 ]. Therefore, we investigated the feasibility of ATD-GC/MS as a tool to predict the aromatic components present in Chrysanthemum morifolium .…”

Section: Introductionmentioning

confidence: 99%

Analysis of Floral Volatile Components and Antioxidant Activity of Different Varieties of Chrysanthemum morifolium

Liu

Aobulikasimu·Nuerbiye

Cheng

et al. 2017

Molecules

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This study investigated the volatile flavor compounds and antioxidant properties of the essential oil of chrysanthemums that was extracted from the fresh flowers of 10 taxa of Chrysanthemum morifolium from three species; namely Dendranthema morifolium (Ramat.) Yellow, Dendranthema morifolium (Ramat.) Red, Dendranthema morifolium (Ramat.) Pink, Dendranthema morifolium (Ramat.) White, Pericallis hybrid Blue, Pericallis hybrid Pink, Pericallis hybrid Purple, Bellis perennis Pink, Bellis perennis Yellow, and Bellis perennis White. The antioxidant capacity of the essential oil was assayed by spectrophotometric analysis. The volatile flavor compounds from the fresh flowers were collected using dynamic headspace collection, analyzed using auto thermal desorber–gas chromatography/mass spectrometry, and identified with quantification using the external standard method. The antioxidant activities of Chrysanthemum morifolium were evaluated by DPPH and FRAP assays, and the results showed that the antioxidant activity of each sample was not the same. The different varieties of fresh Chrysanthemum morifolium flowers were distinguished and classified by fingerprint similarity evaluation, principle component analysis (PCA), and cluster analysis. The results showed that the floral volatile component profiles were significantly different among the different Chrysanthemum morifolium varieties. A total of 36 volatile flavor compounds were identified with eight functional groups: hydrocarbons, terpenoids, aromatic compounds, alcohols, ketones, ethers, aldehydes, and esters. Moreover, the variability among Chrysanthemum morifolium in basis to the data, and the first three principal components (PC1, PC2, and PC3) accounted for 96.509% of the total variance (55.802%, 30.599%, and 10.108%, respectively). PCA indicated that there were marked differences among Chrysanthemum morifolium varieties. The cluster analysis confirmed the results of the PCA analysis. In conclusion, the results of this study provide a basis for breeding Chrysanthemum cultivars with desirable floral scents, and they further support the view that some plants are promising sources of natural antioxidants.

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Section: Introductionmentioning

confidence: 99%

Analysis of Floral Volatile Components and Antioxidant Activity of Different Varieties of Chrysanthemum morifolium

Liu

Aobulikasimu·Nuerbiye

Cheng

et al. 2017

Molecules

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“…The conversion factor is thus 240/152 = 1.58, and the concentration of thiram = CS 2 concentration × 1.58. 4 …”

Section: Sample Preparation and Analysismentioning

confidence: 99%

“…Generally, DTCs are not considered to be highly toxic, but short-term exposure can cause eye, respiratory and skin irritation. 4 The toxicological significance of such fungicides in food is related to the metabolite or its degradation product ethylenethiourea (ETU), which is known to be carcinogenic, mutagenic and teratogenic. 23 Therefore, the purpose of this study was to compare critically and statically the performance of the gas chromatographic methods using three different detection systems (electron capture detection (ECD), pulsed flame photometric detection (PFPD) and mass spectrometry (MS)) with a UV-Vis spectrophotometric method for the determination of DTCs in lettuce.…”

Section: Introductionmentioning

confidence: 99%

“…2 Generally, DTCs are not considered to be highly toxic, but short-term exposure can cause eye, respiratory and skin irritation. 4 The toxicological significance of such fungicides in food is related to the metabolite or its degradation product ethylenethiourea (ETU), which is known to be carcinogenic, mutagenic and teratogenic. 5 A variety of methods have been developed to analyze DTC residues in different crops.…”

Section: Introductionmentioning

confidence: 99%

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Comparison Between Three Chromatographic (GC-ECD, GC-PFPD and GC‑ITD‑MS) Methods and a UV-Vis Spectrophotometric Method for the Determination of Dithiocarbamates in Lettuce

Pizzutti¹,

Kok²,

Silva³

et al. 2016

J. Braz. Chem. Soc.

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The purpose of this study was to compare the performance of gas chromatographic with electron capture detector, pulsed flame photometric detector and mass spectrometry (GC-ECD, GC-PFPD and GC-MS) and UV-Vis spectrophotometric methods, based on acidic hydrolysis with tin(II) chloride of dithiocarbamate and analysis of the evolved CS 2 . For the validation studies were assessed linearity, limit of detection (LOD), limit of quantification (LOQ), accuracy and precision. Recovery experiments were performed at 0.05 and 0.4 (chromatographic method) and 0.4, 0.8 and 2.0 mg CS 2 kg -1 (UV-Vis spectrophotometric method). The analytical curves were linear from 0.08 to 2.0 µg CS 2 mL -1 (chromatographic method) and from 0.4 to 2.2 µg mL -1 and from 2.2 to 8.9 µg CS 2 mL -1 (both with r 2 > 0.995) (UV-Vis spectrophotometric method). Method LODs were 0.01 and 0.28 mg CS 2 kg -1 and LOQs were 0.02 and 0.4 mg CS 2 kg -1 for the chromatographic and spectrophotometric methods, respectively. Acceptable accuracy was obtained for both methods (RSDs < 15.9% and recoveries from 87.7-107.4%). There was no significant difference between the techniques and detectors employees.Keywords: dithiocarbamate, fungicide, lettuce, gas chromatography, UV-Vis spectrophotometry IntroductionDithiocarbamates (DTCs) are important fungicides and the most widely used group of pesticides in agriculture, due to their high efficiency for the control of fungal and bacterial pathogens, low production costs and relatively low mammalian acute toxicity.1-3 Furthermore, these compounds are also used as vulcanization accelerators and antioxidants in the rubber industry. Generally, DTCs are not considered to be highly toxic, but short-term exposure can cause eye, respiratory and skin irritation. 4 The toxicological significance of such fungicides in food is related to the metabolite or its degradation product ethylenethiourea (ETU), which is known to be carcinogenic, mutagenic and teratogenic. 23 Therefore, the purpose of this study was to compare critically and statically the performance of the gas chromatographic methods using three different detection systems (electron capture detection (ECD), pulsed flame photometric detection (PFPD) and mass spectrometry (MS)) with a UV-Vis spectrophotometric method for the determination of DTCs in lettuce. Experimental Chemicals and reagentsIso-octane, pesticide grade (Lab-scan Analytical Sciences, Dublin, Ireland), toluene, pesticide grade (Mallinckrodt, St. Louis, USA), solution of tin(II) chloride 1.5% in 4 mol L -1 hydrochloric acid (Boom, Meppel, The Netherlands), hydrochloric acid (Nuclear, São Paulo, Brazil), tin(II) chloride (Nuclear, São Paulo, Brazil), copper acetate (Vetec, Rio de Janeiro, Brazil), diethanolamine (Nuclear, São Paulo, Brazil), ethanol (Vetec, Rio de Janeiro, Brazil), sodium hydroxide (Merck, Darmstadt, Germany) and lead acetate (Vetec, Rio de Janeiro, Brazil) were used. Pesticide reference material of thiram (99% purity) and carbon disulfide (99.9%) were purchased from Dr. Ehrenstorfer (Augsburg, Ge...

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“…As a consequence, numerous methodologies, aimed toward the protection of consumers and general population, have been developed for pesticide quantification in food and environment [7][8][9][10][11][12][13][14][15][16][17]. In contrast, there are less analytical techniques specifically designed for the healthcare of workers exposed to pesticides [18][19][20][21][22][23].…”

Section: Introductionmentioning

confidence: 99%

Analytical method validation for the evaluation of cutaneous occupational exposure to different chemical classes of pesticides

Simonelli

Basilicata

Miraglia

et al. 2007

Journal of Chromatography B

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Determination of dithiocarbamate pesticides in occupational hygiene sampling devices using the isooctane method and comparison with an automatic thermal desorption (ATD) method

Cited by 22 publications

References 14 publications

Analysis of Floral Volatile Components and Antioxidant Activity of Different Varieties of Chrysanthemum morifolium

Analysis of Floral Volatile Components and Antioxidant Activity of Different Varieties of Chrysanthemum morifolium

Comparison Between Three Chromatographic (GC-ECD, GC-PFPD and GC‑ITD‑MS) Methods and a UV-Vis Spectrophotometric Method for the Determination of Dithiocarbamates in Lettuce

Analytical method validation for the evaluation of cutaneous occupational exposure to different chemical classes of pesticides

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