Sack, C A Determination of methylene chloride acceptability and its "purification" for ethylenethiourea methodology. [electronic resource] - Journal of AOAC International - 1146-8 p. digital Publication Type: Journal Article ISSN: 1060-3271 Subjects--Topical Terms: Chromatography, Liquid--methodsElectrochemistryEthylenethiourea--analysisMethylene Chloride--isolation & purification