Saxena, M C Reduced recovery of dieldrin residues-a shortcoming of sulfuric cleanup of biological samples. [electronic resource] - Journal of analytical toxicology - 150-2 p. digital Publication Type: Journal Article ISSN: 0146-4760 Standard No.: 10.1093/jat/5.3.150 doi Subjects--Topical Terms: Dieldrin--analysisHumansMethodsSulfuric Acids--pharmacology