Insecticide Residues, An Improved Colorimetric Method for Determining Endosulfan (Thiodan) Residues in Vegetables and Beef Fat

Sorption of the Pesticide Endosulphan on Two Indian Soils

“…The term σ s reflects the solute-liquid interactions and is represented by the slope of the log-linear relationship between mole fraction solubility and f s , which is the volume fraction of cosolvents, and α is related to solute-soil and solvent-soil interactions via liquid and organic carbon phase activity coefficients (19,20,(26)(27)(28). The statistical average of the volume-based adsorption coefficients K D (ml/g) was determined by the relation…”

“…The suspensions were then centrifuged at 10,000 rpm for 10 min using a Beckmann Model L3-50 ultracentrifuge, and in the supernatant endosulphan was estimated spectrophotometrically (26) to calculate the amount of endosulphan adsorbed.…”

Residue Reviews

“…Only traces were found after four weeks. In America, MAITLEN et al (1963) could detect no endosulfan residues in beet chippings after treating sugar beet with granules six months and again five months before harvest. BECKMAN et al (1969) obtained similar results with aldicarb, with residues up to 1.2 p.p.m.…”

Pesticide Residues

“…Burke and Mills (46) A colorimetric method for the determination of Thiodan in vegetables and beef fat is described by Maitlen, Walker, and Westlake (141). Vegetables here extracted by tumbling with an nhexane-isopropanol mixture (2 + 1).…”