Sorption/desorption of ( sup 14 C)efrotomycin with soils
- Merck Sharp and Dohme Research labs., Rahway, NJ (USA)
The sorption and subsequent desorption of efrotomycin, which is being developed as a growth promoter in swine, was investigated in five soils of various physical and chemical properties. Sorption equilibration occurred within 7 h. Sorption distribution coefficients ranged from 8 to 290. The Freundlich constant, K, spanned a similar range as n values were near 1. The sorption distribution coefficients, K{sub d}, were not correlated with organic matter content; cation-exchange capacity; sand, silt, or clay content; or soil pH. Hysteresis was observed between the sorption and desorption isotherms for one of the soils. For four soils, only about 50% of the sorbed efrotomycin could be desorbed, even with organic solvents. Efrotomycin is classified as immobile in most soils by comparison of its K{sub oc} values (580-11,000) with those of other chemicals.
- OSTI ID:
- 6521844
- Journal Information:
- Journal of Agricultural and Food Chemistry; (USA), Journal Name: Journal of Agricultural and Food Chemistry; (USA) Vol. 38:3; ISSN JAFCA; ISSN 0021-8561
- Country of Publication:
- United States
- Language:
- English
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