Abstract
A high-temperature distillation technique was developed for determining and chemically identifying the bound (nonextractable) residues of 14C-prometryn in an organic soil and plants. A considerable portion of the bound 14C residues in the incubated organic soil was identified as prometryn. These residues were absorbed by plants grown in the soil. Hono-and di- N -dealkylated metabolites of prometryn were present in the plant bound 14C residues and a major portion of bound residues as associated with lignin. Soil-bound 14C residues were also released from soil by microbes. The bound 14C residues in soil were associated with humin, humic acid, and fulvic acid fractions. Thermoanalytical methods were used to obtained information on the nature and location of 14C bound residues in soil and humic materials.
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