Hostname: page-component-cd9895bd7-hc48f Total loading time: 0 Render date: 2024-12-24T22:51:19.840Z Has data issue: false hasContentIssue false
  • English
  • Français

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
Get access Rights & Permissions [Opens in a new window]

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 

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

Literature Cited

1. Flint, G.W., Alexander, J.J., and Funderburk, O.P. 1968. Vapor pressures of low volatile esters of 2,4-D. Weed Sci. 16:541–544.CrossRefGoogle Scholar
2. Jensen, D.J. and Schall, E.D. 1966. Determination of vapor pressures of some phenoxyacetic herbicides by gas liquid chromatography. J. Agr. Food Chem. 14:123–126.CrossRefGoogle Scholar
3. Langmuir, I. 1913. The vapor pressure of metallic tungsten. Phys. Rev. 2:329–342.CrossRefGoogle Scholar
4. Horner, J., Hee, S.S. Que, and Sutherland, R.G. 1973. The esterification of (2,4-dichlorophenoxy)acetic acid: a quantitative comparison of esterification techniques. Anal. Chem. 46:110–112.CrossRefGoogle Scholar
5. Hee, S.S. Que and Sutherland, R.G. 1973. Penetration of amine salt formulations of 2,4-D into sunflower. Weed Sci. 21:115–118.CrossRefGoogle Scholar
6. Scholtz, M.T. and Trass, O. 1963. Mass transfer in the laminar radial wall jet. A.I. Ch. E. J. 9:548–554.CrossRefGoogle Scholar
7. Starr, R.I. and Johnsen, R.E. 1968. Laboratory method for determining the rate of volatilization of insecticides from plants. J. Agr. Food Chem. 16:411–414.CrossRefGoogle Scholar