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A rapid method for the detection and determination of captan.

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Title A rapid method for the detection and determination of captan.
 
Creator Visweswaraiah, K.
Jayaram, M.
Majumder, S. K.
 
Subject 05 Insect/Pest Control
 
Description Captan (N-trichloromethylthiotetrahydrophthalimide) has various industrial
and agricultural applications, being used both as a fungicide at the 100-1000 p.p.m.
level and in grain protection at levels above 1000 p.p.m.1. The practice of including
insecticides such as Aldrin, Lindane, DDT or Dieldrin, with Captan as seed treatments
for dual protection against soil insects and soil-borne pathogens has gained widespread
acceptance2.
Many methods have been suggested for detection and determination of Captan.
KITTLESON2 has described a method in which resorcinol and Captan are heated at 135-
140° to form an intense red coloured compound; after treatment with acetic acid, the
yellow colour is measured at 425 nm. ENGST AND SCHNASK3 have used a silver nitrate
spray followed by ultraviolet irradiation in a thin-layer chromatographic method.
IRWIN et al.4 have studied the response of Captan and its structurally related fungicides
(Folpet, Difolatan) to several reagents such as resorcinol, permanganate, dimethyl-pphenylenediamine
and chromic acid, also for thin-layer chromatography. A colorimetric
determination of Captan has been based5 on its reaction with pyridine and
tetraethylammonium hydroxide. Thin-layer chromatographic methods have been
used at the nanogram level, and these have been used semiquantitatively6,7. In a
previous report8, a rapid semiquantitative method for Captan based on its reaction
with monoethanolamine was applied in the presence of Aldrin, DDT, BHC, Malathion,
etc. The extension of this method to fully quantitative work is reported here.
 
Date 1970
 
Type Article
PeerReviewed
 
Format application/pdf
 
Language en
 
Rights —
 
Identifier http://ir.cftri.com/2556/1/Analytica_Chimica_Acta_1970_52_559-561.pdf
Visweswaraiah, K. and Jayaram, M. and Majumder, S. K. (1970) A rapid method for the detection and determination of captan. Analytica Chemica Acta, 52. pp. 559-561.