title: Determination of phosphine: comparison of rates of desorption by purge-and-trap method and by sulfuric acid treatment.
abstract: Two methods were compared for quantitative determination of phosphine present on fumigated food and materials. The rate of desorption of PH3 by using a purge-and-trap method was shown to be much slower when compared with sulfuric acid treatment and was also simpler. Application of the modified sulfuric acid treatment for real samples is described.
mesh_terms: D000327:Adsorption; D055598:Chemical Phenomena; D002621:Chemistry; D002849:Chromatography, Gas / Q000379:methods; D005504:Food Analysis / Q000379:methods; D005651:Fumigation; D010720:Phosphines / Q000032:analysis*; D013464:Sulfuric Acids
chemical_list: D010720:Phosphines; D013464:Sulfuric Acids; C044646:phosphine; C033158:sulfuric acid