scholarly journals Residues of organochlorine pesticides in irrigated sierozem-meadow soils around buried chemicals stock

2018 ◽  
Vol 13 (No. 2) ◽  
pp. 108-114 ◽  
Author(s):  
H. Artikov ◽  
M. Kočárek ◽  
A. Fraňková ◽  
T. Abdrakhmanov ◽  
L. Borůvka ◽  
...  
Keyword(s):  
Mass Spectrometry ◽  
Gas Chromatography ◽  
Organochlorine Pesticides ◽  
Health Monitoring ◽  
Food Chain ◽  
Soil Depth ◽  
Soil Samples ◽  
Gas Chromatography Mass Spectrometry ◽  
Soil Profiles ◽  
Detectable Amount

The concentration and distribution of organochlorine pesticides (OCPs) were studied in sierozem-meadow soils around a buried obsolete chemicals stock in Mirzaabad district of Syrdarya region of Uzbekistan. 23 soil samples were collected from the topsoil (0–30 cm of soil depth) and 15 samples were collected from three soil profiles (down to 125 cm of soil depth) located in nearby vicinity of the stock. They were extracted using an automated Soxhlet extractor and analyses were done by gas chromatography-mass spectrometry. The detected OCPs were DDTs, HCHs, aldrin, dieldrin, endrin, chlorpyrifos, and endosulfans. The concentration of HCH was detected only as α-HCH in the range of 0–3.159 μg/kg. Only two isomers of DDT: p,p'-DDE and p,p'-DDD were found to be dominant, with the range of their values of 0.068-4.941 and 0-13.63 μg/kg, respectively. The concentrations of aldrin, dieldrin, endrin and chlorpyrifos in the samples collected around the source were in the range of 0–0.504, 0–1.117, 2.414–20.87 μg/kg and 0–3.819 μg/kg. β-endosulfan varied from a non-detectable amount to 74.56 μg/kg. According to results, the sum of DDTs was observed to be higher in the upper horizons, especially at depths of 0–10 and 10–50 cm, with the values 543.15 and 212.22 μg/kg, respectively, which can be a cause of concern. Due to their ability to migrate in the environment, accumulate in the food chain and be harmful to human health, monitoring the level of residues of organochlorine pesticides in soil is of vital importance.

scholarly journals Determination of Organochlorine Pesticides and Chlorobenzenes in Strawberries by Using Accelerated Solvent Extraction Combined with Sorptive Enrichment and Gas Chromatography/Mass Spectrometry

2001 ◽  
Vol 84 (4) ◽  
pp. 1194-1201 ◽  
Author(s):  
Luise Wennrich ◽  
Peter Popp ◽  
Gábor Köller ◽  
Jürgen Breuste
Keyword(s):  
Mass Spectrometry ◽  
Gas Chromatography ◽  
Solvent Extraction ◽  
Organochlorine Pesticides ◽  
Accelerated Solvent Extraction ◽  
Stir Bar Sorptive Extraction ◽  
Mass Spectrometry Analysis ◽  
Gas Chromatography Mass Spectrometry ◽  
Chromatography Mass Spectrometry

Abstract An analytical scheme for the determination of several organochlorine pesticides like hexachlorocyclohexanes (HCHs) and DDX compounds (p,p′-DDE, p,p′-DDD, and p,p′-DDT) as well as chlorobenzenes in strawberries has been developed. The procedure is based on aqueous accelerated solvent extraction (ASE) followed by solidphase microextraction (SPME) or stir bar sorptive extraction (SBSE) and subsequent thermodesorption–gas chromatography/mass spectrometry analysis. A 65 μm polydimethylsiloxane/divinylbenzene fiber was chosen for the SPME experiments. Significant SPME and ASE parameters were optimized using spiked water and strawberry samples. For the ASE of the organochlorine compounds, a water–acetone mixture (90 + 10, v/v) as the extraction solvent, an extraction temperature of 120°C, and 2 cycles of 10 min extraction proved optimal. The developed method was evaluated with respect to precision and limits of detection (LOD). The relative standard deviations of replicate ASE–SPME determinations (n = 5) were in the range of 4–24%. LOD values between 1 and 10 μ g/kg were achieved with the exception of DDT and DDE (40 μg/kg). Using SBSE, the LOD of these compounds could be improved (2 and 5 μg/kg). The main advantages of this method are the avoidance of cleanup and concentration procedures as well as the significant reduction of the required volume of organic solvents. The described method was applied to the determination of the pollutants in strawberry samples collected from different allotment gardens in a potentially polluted area, the Bitterfeld-Wolfen region (Germany).

scholarly journals Rapid Monitoring of Organochlorine Pesticides Residues in Various Fruit Juices and Water Samples Using Fabric Phase Sorptive Extraction and Gas Chromatography-Mass Spectrometry

2019 ◽  
Author(s):  
Ramandeep Kaur ◽  
Ripneel Kaur ◽  
Susheela Rani ◽  
Ashok Kumar Malik ◽  
Abuzar Kabir ◽  
...  
Keyword(s):  
Mass Spectrometry ◽  
Gas Chromatography ◽  
Organochlorine Pesticides ◽  
Solid Phase ◽  
Sol Gel ◽  
Gas Chromatography Mass Spectrometry ◽  
Sorptive Extraction ◽  
Chromatography Mass Spectrometry ◽  
Poly Ethylene

Fabric phase sorptive extraction, an innovative integration of solid phase extraction and solid phase microextraction principles, has been combined with gas chromatography-mass spectrometry for the rapid extraction and determination of nineteen organochlorine pesticides in various fruit juices and water samples. FPSE consolidates the advanced features of sol-gel derived extraction sorbents with the rich surface chemistry of cellulose fabric substrate, which could directly extract target analytes from complex sample matrices and substantially simplifies the sample preparation operation. Important FPSE parameters including sorbent chemistry, extraction time, stirring speed, type and volume of back-extraction solvent and back-extraction time have been optimized. Calibration curves were obtained in the concentration range 0.1-500 ng/mL. Under the optimum conditions, the limits of detection were obtained in the range 0.007-0.032 ng/mL with satisfactory precision (RSD<6%). The relative recoveries obtained by spiking organochlorine pesticides in water and selected juice samples were in the range of 91.56–99.83%. The sorbent sol-gel poly(ethylene glycol)-poly(propylene glycol)-poly(ethylene glycol) was applied for the extraction and preconcentration of organochlorine pesticides in aqueous and fruit juice samples prior to analysis with gas chromatography-mass spectrometry. The results demonstrated that the present method is simple, rapid, and precise for the determination of organochlorine pesticides in aqueous samples.

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