title: Determination of phosphine in biogas and sludge at ppt-levels with gas chromatography-thermionic specific detection.
abstract: A gas chromatographic (GC) system to measure free phosphine in biogas and matrix bound phosphine in manure and sludge is presented. The system consists of a sample preconcentration trap filled with glass beads, connected with a capillary GC equipped with a thermionic specific detector. With a trap temperature as low as -155 degrees C, a sampling flow of 20 ml/min and a typical total sample volume of 100 ml, free phosphine concentrations in the low ng/m3 range and matrix bound phosphine in the low ng/kg dry matter range, can be accurately and reproducibly determined.
authors.affiliation: Laboratory of Microbial Ecology and Technology, Faculty of Applied and Biological Sciences, Ghent University, Belgium.
authors.forename: Joris
authors.initials: J
authors.lastname: Roels
authors.forename: Herman
authors.initials: H
authors.lastname: Van Langenhove
authors.forename: Willy
authors.initials: W
authors.lastname: Verstraete
mesh_terms: D002849:Chromatography, Gas / Q000379:methods*; D010720:Phosphines / Q000032:analysis*; D012680:Sensitivity and Specificity; D012722:Sewage / Q000737:chemistry*
chemical_list: D010720:Phosphines; D012722:Sewage; C044646:phosphine