Development of methods for the determination of elemental phosphorus and phosphine in air.
NIOSH 1978 Aug; :1-107
A solid sorbent sampling method was presented for the determination of elemental phosphorus (7723140) vapor concentrations in air. The basis for the method was the collection of phosphorus vapor on Tenax- GC, extraction with xylene, and determination by gas chromatography with a flame photometric detector. The method appeared to meet all the necessary requirements which have been established by NIOSH for industrial hygiene applications. An effort to develop such a method using a nonspectrophotometric analytical finish was not completely successful. It was not possible to identify a solid sorbent that could collect phosphorus efficiently and from which phosphine (7803512) could be recovered by extraction or heating. The collection of phosphine by reaction with mercuric-cyanide on silica- gel was the most nearly satisfactory, with subsequent regeneration of phosphine by the reduction with sodium-borohydride and with gas chromatographic determination of the recovered phosphine. The recovery of phosphine was quantitatively poor and the stability of the collected sample was poor during periods of storage.
NIOSH-Contract; Contract-210-75-0047; Analytical-methods; Chemical-analysis; Analytical-chemistry; Chromatographic-analysis; Sampling-equipment; Toxic-gases
(NIOSH) 78-177; Contract-210-75-0047
National Institute for Occupational Safety and Health