Hostname: page-component-586b7cd67f-dsjbd Total loading time: 0 Render date: 2024-11-28T15:11:05.630Z Has data issue: false hasContentIssue false
  • English
  • Français

The solubility of some likely spray substances in solvents containing soap. The preparation of spraying emulsions

Published online by Cambridge University Press:  27 March 2009

R. M. Woodman
R. M. Woodman
Affiliation:
(School of Agriculture, University of Cambridge.)
Get access Rights & Permissions [Opens in a new window]

Extract

A lighting (paraffin) oil bought casually, such as is often used in paraffin emulsions for spraying, has been subjected to fractional distillation, and shown to be unsuitable as a spraying oil.

Approximate solubilities at room temperature of various “oils” in solvents such as soap solutions with and without the addition of phenols, hydrogenated phenols and pyridine, have been determined. Spray fluids containing paraffin oil, benzene, and aniline in solution are economically possible, but coal tar fractions such as anthracene and creosote oils, will, owing to lack of solubility, have to be applied to plants as emulsions. Cresylic acid is the best aid to solution of paraffin oil, but is probably more injurious to foliage than the dearer, hydrogenated phenol, hexalin.

Experiments have been made on the influence of temperature when using soap (sodium oleate) and gelatine as emulsifiers; rise in temperature is found to facilitate the formation of emulsions in soap solutions, but to have a much more complex effect when gelatine is the emulsifier. A possible explanation of these facts is given.

Type
Research Article
Information
The Journal of Agricultural Science , Volume 17 , Issue 1 , January 1927 , pp. 44 - 59
Copyright
Copyright © Cambridge University Press 1927

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

REFERENCES

(1)Woodman, . Journ. Pomol. Hort. Sci. 1925, 4 184; 1925, 5, 43.Google Scholar
(2)Duke of Bedford and MrPickering, . Science and Fruit Growing, 1919, p. 153. Moore and Graham. Journ. Econ. Entom. 1918, 11, 70.Google Scholar
(3)Petherbridge, and Dillon-Weston, . Journ. Minist. Agric. 1926.Google Scholar
(4)Pickering, . J.C.S. 1917, 111 86.Google Scholar
(5)Woodman, and Corbet, . J.C.S. 1925,127, 2461.Google Scholar
(6)Bourcart, , Insecticides, Fungicides and Weed Killers (1925, 2nd Eng. ed.), (a) p. 343; (6) pp. 383, 384, 387; (c) p. 312.Google Scholar
(7)Foreman, and Graham-Smith, . Journ. of Hygiene, 1917, 16 109.CrossRefGoogle Scholar
(8)Tattersfield, and Roberts, . Journ. Agric. Sci. 1920, 10 199.CrossRefGoogle Scholar
(9)Heaton, . Journ. Oil and Colour Chemists’ Assoc. 1923, 6 No. 39.Google Scholar
(10)Woodman, . Journ. Phys. Chem. 1926, 30 658.CrossRefGoogle Scholar
(11)Woodman, . Journ. Pomol. Hort. Sci. 1924, 4 38; Journ. Soc. Leather Trades’ Chemists, 1924, 8, 517.Google Scholar
(12)Woodman, . Journ. Pomol. Hort. Sci. 1925, 4 78.Google Scholar
(13)Goodwin, and Martin, . Journ. Agric. Sci. 1925, 15, 476.CrossRefGoogle Scholar
(14)Loeb, . Proteins and the Theory of Colloidal Behaviour, 1922.CrossRefGoogle Scholar
(15)Briggs, . Journ. Phys. Chem. 1920, 24 120.CrossRefGoogle Scholar
(16)Woodman, . Journ. Pomol. Hort. Sci. 1925, 4 95.Google Scholar
(17)Bayliss, . Principles of General Physiology, 1920, 61.Google Scholar
(18)Thompson, . Journ. Soc. Leather Trades’ Chemists, 1919, 3 209.Google Scholar
(19)Ramsden, . Proc. Roy. Soc. (A), 1903, 72 156; Zeitschr. Phys. Chem. 1904, 47 336; Pickering, J.C.S. 1907, 91, 2001; Kolloid Zeitschr. 1910, 7 11.Google Scholar