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Volatilization of Various Esters and Salts of 2,4-D

Published online by Cambridge University Press:  12 June 2017

S. S. Que Hee  and
R. G. Sutherland
S. S. Que Hee
Affiliation:
Dept. of Chem. and Chem. Eng., Univ. of Saskatchewan, Saskatoon, Saskatchewan, Canada S7N 0W0
R. G. Sutherland
Affiliation:
Dept. of Chem. and Chem. Eng., Univ. of Saskatchewan, Saskatoon, Saskatchewan, Canada S7N 0W0
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Abstract

The degree and rate of volatilization, and the partial vapor pressures of the methyl, n butyl, and n octyl esters of 2,4-D [(2,4-dichlorophenoxy)acetic acid] were determined at ambient temperatures using a kinetic system approximating field-air conditions. The initial surface area/applied mass ratio (Q), as well as temperature and the type of compound, determined the volatility. Only when the Q values were kept constant did the volatility decrease with increasing chain length and decreasing saturated vapor pressure as expected. A mathematical model was constructed. Similar results were obtained for the amine salts which had saturated vapor pressures of ca 10−10 mm Hg at 38 C. Vapor drift can be essentially eliminated by use of the amine salts.

Type
Research Article
Information
Weed Science , Volume 22 , Issue 4 , July 1974 , pp. 313 - 318
Copyright
Copyright © 1974 by the Weed Science Society of America 

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References

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