Effects of Soil pH and Moisture on the Direct Radioassay of Herbicides in Soil
- 1 January 1975
- journal article
- research article
- Published by Cambridge University Press (CUP) in Weed Science
- Vol. 23 (1) , 49-52
- https://doi.org/10.1017/s0043174500062500
Abstract
The addition of 1.5 ml water or 1.5 ml 0.1 N oxalic acid solution to 2 g soil samples containing 14C-labeled herbicides increased the 14C extraction efficiencies. The employment of a modified dioxane extracting-counting solution allowed the addition of 2 ml water without causing a liquid phase separation. Extraction of benzoic acid herbicides from soil was enhanced when 5 mg oxalic acid was added to 2 g soil or when soil was acidified to pH 4.1.Keywords
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