Rapid Analysis of 2,4-D in Soil Samples by Modified Soxhlet Apparatus Using HPLC with UV Detection

Pesticides play an important role in agriculture to control or eliminate weeds, pests, insects and plant disease. Due to their wide usage in past years, pesticides are known as environmental pollutants. They can contaminate water, soil, biota and air. The objective of this study is to determine the occurrence and distribution of Hexachlorohexanes (HCH) isomers in soil samples. HCH are measured in soil samples collected from nine agricultural stations in Durres city in Albania. They are extracted using Soxhlet apparatus and Hexane as a solvent and analysed via GC–MS. The highest levels of HCH are detected in Station 8 due to the high agricultural activity in this area.

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A RAPID METHOD FOR CATION EXCHANGE CAPACITY ESTIMATION OF MINERAL SOILS USING METHYLENE BLUE ADSORPTION

Canadian Journal of Soil Science ◽

10.4141/cjss88-016 ◽

1988 ◽

Vol 68 (1) ◽

pp. 165-169 ◽

Cited By ~ 4

Author(s):

Y. K. SOON

Keyword(s):

Methylene Blue ◽

Organic Matter ◽

Colorimetric Method ◽

Exchange Capacity ◽

Rapid Analysis ◽

Soil Samples ◽

Methylene Blue Adsorption ◽

Independent Variable ◽

Mineral Soils ◽

Key Words Methylene Blue

A colorimetric method, based on methylene blue adsorption, for rapid analysis of soil CEC is described. The effect of soil pH and organic matter was examined by multiple regression. For 44 test samples CEC was predicted well from transmittance measured at 550 nm (r2 = 0.735**); the r2 increased to 0.815** by excluding two moderately calcareous soil samples, and to 0.872** by including organic matter as a second independent variable. Key words: Methylene blue adsorption, CEC, colorimetric method

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Study of Ultraviolet Spectrophotometer for Rapid Analysis of Oil Content in the Oil-Contaminated Soil

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.864-867.930 ◽

2013 ◽

Vol 864-867 ◽

pp. 930-934 ◽

Cited By ~ 1

Author(s):

Li Hua Mao ◽

Xue Mei Han

Keyword(s):

Contaminated Soil ◽

Room Temperature ◽

Oil Content ◽

High Efficiency ◽

Extraction Efficiency ◽

Detection Method ◽

Ultrasonic Method ◽

Rapid Analysis ◽

Soil Samples ◽

Two Stages

Oil soil samples were extracted using cyclohexane, petroleum ether and chloroformion by the ultrasonic method. The feasibility of the ultraviolet spectrophotometric method for rapid analysis of the oil content in the oil-contaminated soil was explored. The result indicates that compared with other test methodsultraviolet spectrophotometry can be a simple, quick and steady detection method of oil content in the oil-contaminated soil. The method of oil material extracted by cyclohexane is high efficiency and stable. When the temperature was between room temperature and 40°C, ultrasonic extraction time is 15 min, and the extraction efficiency turned out to be stable (greater than 94%) when solvent dosage exceeded 40mL. Two stages extraction could achieve the best effect with the extraction dosage of 20 mL for each stage.

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