Abstract
Sensitive spectrophotometric method for determination of kelthane in sub parts per million level is described, which is based on Fujiwara reaction. Kelthane on alkaline hydrolysis gives chloroform, which can be reacted with pyridine to produce red colour. The colour is discharged by addition of glacial acetic acid. Then Benzidine (4,4’-Bianiline) reagent is added due to which a yellowish-red colour is formed which has an absorption maximum at 490nm. Beer’s law is obeyed in the range of 3.3 - 26.0 µg (0.13 - 1.04 ppm) of Kelthane per 25ml of final solution. The molar absorptivity and Sandell’s sensitivity were found to be 4.32 × 105 L?mol–1?cm–1 and 0.022 µg?cm–2 respectively. The method is found to be free from interferences of other organochlorine pesticides and various co-pollutants and can be successfully applied for the determination of kelthane in environmental samples.
Highlights
Kelthane is a well known acaricide of organochlorine group of pesticides, chemically it is known as 4-4’dichloro-alpha trichloromethyl benzhydrol [1] Kelthane appears to be effective against a wide range of mite species and is a well known miticide
It has been proved that kelthane is a sever irritant [3,4]
The National Cancer Institute suggests the possibility of kelthane as oncogen
Summary
Kelthane is a well known acaricide of organochlorine group of pesticides, chemically it is known as 4-4’dichloro-alpha trichloromethyl benzhydrol [1] Kelthane appears to be effective against a wide range of mite species and is a well known miticide. It is effective against tetrachid, mites, cydamen, broad, mites, European red spider, apple-rust, cherry-rust, tomato-rust, and various other fruits and vegetable rusts [2]. The toxic effect of kelthane shows general weakness, comma, affects sex hormones, inhibition of aromatose activity and death in animal. The method has been successfully applied for the determination of kelthane in environmental samples
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