Zeolite-SiC in PVC Matrix as a New SPME Fiber for Gas Chromatographic Determination of BTEX in Water and Soil Samples

2012 ◽  
Vol 59 (9) ◽  
pp. 1080-1085 ◽  
Author(s):  
Amin Chalabiani ◽  
Amir Abbas Matin ◽  
Khalil Farhadi
Keyword(s):  
Chromatographic Determination ◽  
Soil Samples ◽  
Spme Fiber ◽  
Water And Soil Samples

RETRACTED: Determination of Co(II) in water and soil samples using spectrophotometry coupled with preconcentration on 4-amino methyl pyridine anchored silica gel column

2007 ◽  
Vol 146 (1-2) ◽  
pp. 137-141 ◽  
Author(s):  
C. Sivani ◽  
G. Ramakrishna Naidu ◽  
J. Narasimhulu ◽  
D. Rekha ◽  
J. Dilip Kumar ◽  
...  
Keyword(s):  
Silica Gel ◽  
Soil Samples ◽  
Water And Soil Samples ◽  
Methyl Pyridine

scholarly journals Determination of Chlorinated Phenols in Water and Soil by Capillary Zone Electrophoresis

1997 ◽  
Vol 80 (6) ◽  
pp. 1308-1314 ◽  
Author(s):  
Wayne E Rae ◽  
Charles A Lucy
Keyword(s):  
Capillary Zone Electrophoresis ◽  
Fused Silica ◽  
Soil Samples ◽  
Chlorinated Phenols ◽  
Relative Standard ◽  
Zone Electrophoresis ◽  
Water And Soil Samples ◽  
Fused Silica Capillary ◽  
Capillary Zone

Abstract A capillary zone electrophoresis (CZE) method was developed to separate and determine chlorinated phenols in water and soil samples. A mixture of 16 chlorinated phenols was resolved in 25 min by using a 77 cm (70 cm to detector) × 75 μm fused silica capillary with 0.015M tetraborate/0.045M phosphate (pH 7.3) buffer at 22 kV. Calibration linearities for water samples in the low parts-permillion range were good (correlation coefficient > 0.99) for all solutes except p-chlorophenol. Average precision was 17% relative standard deviation. Typical detection limits were in the 200 μg/L range. Recoveries of chlorinated phenols from synthetic soil samples with methanol were quantitative.

scholarly journals Utilization of Microfluidic Device for Determination of Nitrite and Nitrate in Water and Soil Samples

2013 ◽  
Vol 25 (12) ◽  
pp. 6486-6490 ◽  
Author(s):  
N. Laitip ◽  
N. Chomnawang ◽  
N. Youngvises ◽  
W. Threeprom
Keyword(s):  
Microfluidic Device ◽  
Soil Samples ◽  
Water And Soil Samples

scholarly journals Gas Chromatographic Determination of Chlorothalonil in Leaves and Roots of Scrophularia and in Soil

1996 ◽  
Vol 79 (2) ◽  
pp. 587-588 ◽  
Author(s):  
Lan Zhao ◽  
De-Fang Fan
Keyword(s):  
Electron Capture ◽  
Chromatographic Method ◽  
Detection Limits ◽  
Chromatographic Determination ◽  
Soil Samples ◽  
Florisil Column ◽  
Glass Column ◽  
Leaves And Roots ◽  
Gas Chromatographic Method

Abstract A gas chromatographic method is described for determination of chlorothalonil residues in leaves and roots of Scrophularia and in soil. Samples were extracted with acetone and cleaned up on a Florisil column. Chlorothalonil residues are chromatographed directly on a glass column of 1.5% OV-17 and 2% QF-1 coated on 80-100 mesh Chromosorb W (HP) support and measured with a 63Ni electron capture detector. Detection limits are 0.001 ppm for leaf, 0.005 ppm for root, and 0.001 ppm for soil.

Liquid Chromatographic Determination of Sulfentrazone in Soil

1999 ◽  
Vol 82 (5) ◽  
pp. 1214-1216 ◽  
Author(s):  
G Anthony Ohmes ◽  
Thomas C Mueller
Keyword(s):  
Chromatographic Determination ◽  
Soil Samples ◽  
Ultraviolet Detection ◽  
Liquid Chromatographic Separation ◽  
Relative Standard ◽  
Limit Of Quantitation ◽  
Liquid Chromatographic Determination ◽  
Liquid Chromatographic ◽  
Soluble Components

Abstract A rapid method for the determination of sulfentrazone in soils is described. The method consists of extraction of soil samples with methanol, filtration, liquid chromatographic separation of methanol-soluble components through a C18 column, and ultraviolet detection at 220 nm. Recoveries from fortified surface soils were >85% for sulfentrazone. Average relative standard deviations over the soils examined was 7.7%. A conservative lower limit of quantitation for sulfentrazone was 40 ng/g soil.

scholarly journals Liquid Chromatographic Determination of Fosthiazate Residues in Environmental Samples and Application of the Method to a Fosthiazate Field Dissipation Study

2005 ◽  
Vol 88 (6) ◽  
pp. 1827-1833 ◽  
Author(s):  
Nicholas G Tsiropoulos ◽  
Dimitrios T Likas ◽  
Dimitrios G Karpouzas
Keyword(s):  
Liquid Chromatography ◽  
Solid Phase ◽  
Chromatographic Determination ◽  
Physicochemical Characteristics ◽  
Reversed Phase ◽  
Subsequent Elution ◽  
Water And Soil Samples ◽  
Liquid Chromatographic Determination ◽  
Liquid Chromatographic

Abstract A method was developed and validated for the determination of residues of the organophosphorus nematicide fosthiazate in soil and water by using reversed-phase liquid chromatography with UV detection. Good recoveries (>85%) of fosthiazate residues were obtained from water samples (drinking water, groundwater, and liquid chromatography water) after passage of 0.5–2 L water through solid-phase extraction (SPE) C-18 cartridges and subsequent elution with ethyl acetate. Residues in soil were extracted with methanol–water (75 + 25, v/v) on a wrist-action shaker, and the extract was cleaned up on C-18 SPE cartridges before analysis. The method was validated by analysis of a range of soils with different physicochemical characteristics; recoveries exceeded 87% at fortification levels ranging from 0.02 to 5.0 mg/kg. The precision values obtained for the method, expressed as repeatability and reproducibility, were satisfactory (<11%). Fosthiazate detection limits were 0.025 μg/L and 0.005 mg/kg for water and soil samples, respectively. The decline in the levels of fosthiazate residues in soil was measured after application of fosthiazate to protected tomato cultivation. The dissipation of fosthiazate residues followed first-order kinetics with a calculated half-life of 21 days.

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