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Effects of CO2, N2, Air, and Nitrogen Salts on Spray Solution pH

Published online by Cambridge University Press:  12 June 2017

Ronald W. McCormick
Ronald W. McCormick*
Affiliation:
DowElanco, Field Research, Wayside, MS 38780-2557
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Abstract

Water samples from eight locations, ranging in pH from 7.1 to 8.5, were tested to determine the effect of carbon dioxide (CO2) pressurization on pH. After pressurization with CO2 the pH of the water decreased 1.8 to 4.1 pH units. An increase of 0.4 to 1.2 pH units occurred after the CO2 pressurized water exited a spray nozzle. The use of N2 or air as a pressurizing gas had very little effect on pH. The addition of diammonium phosphate, urea-ammonium nitrate (UAN)3, or ammonium sulfate had only minor effects on water pH. The addition of monoammonium phosphate reduced water pH to 4.6 to 5.5. The physical/chemical properties and activity of a herbicide may be altered with the change in spray solution pH by using CO2 to pressurize the spray solution.

Keywords

Chlorimuron, 2-[[[[(4-chloro-6-methoxy-2-pyrimidinyl)amino]carbonyl]amino]sulfonyl]benzoic acid, ethyl esterFertilizerUAN
Type
Notes
Information
Weed Technology , Volume 4 , Issue 4 , December 1990 , pp. 910 - 912
Copyright
Copyright © 1990 Weed Science Society of America 

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References

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