Development of solid state samplers for work atmospheres

Greifer, B; Cadoff, B C; Wing, J. K.; Taylor, Jayne

doi:10.6028/nbs.ir.74-527

Cited by 3 publications

(2 citation statements)

References 18 publications

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“…to obtain adequate analytical sensitivity. A device for vacuum sampling large volumes of vapor, as described by Cadoff (14), was constructed for this purpose. With this system, the flow rate is adjustable and, once selected, pressure drops as high as 500 mm Hg (67 kPa) can be tolerated without any measurable change in the flow rate through the tube.…”

Section: Methodsmentioning

confidence: 99%

Generator for producing trace vapor concentrations of 2,4,6-trinitrotoluene, 2,4-dinitrotoluene, and ethylene glycol dinitrate for calibrating explosives vapor detectors

Pella¹

1976

Anal. Chem.

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Section: Methodsmentioning

confidence: 99%

Generator for producing trace vapor concentrations of 2,4,6-trinitrotoluene, 2,4-dinitrotoluene, and ethylene glycol dinitrate for calibrating explosives vapor detectors

Pella¹

1976

Anal. Chem.

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“…19 According to ref. 20 the reaction involves two steps: PH 3 z6AgNO 3 [Ag 3 P,3AgNO 3 z3HNO 3 Ag 3 P,3AgNO 3 z3H 2 O[6Ag 0 z3HNO 3 zH 3 PO 3 In France, the use of phosphine is regulated by governmental decrees (no. 88-448, April 1988 and no.…”

Section: Aim Of Investigationmentioning

confidence: 99%

Phosphine sampling and analysis using silver nitrate impregnated filters

Demange

Elcabache

Grzebyk

et al. 2000

J. Environ. Monitor.

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In the field of industrial hygiene, besides the necessity of monitoring phosphine with direct reading apparatus to prevent accidents, there is a need for a method of sampling and analysing phosphine to control workers' exposure. The use of filters impregnated with silver nitrate to collect arsine, phosphine and stibine in workplace air has been described in the literature. Having previously chosen this type of filter to collect arsine, we studied its characteristics for phosphine capture. A filter impregnated with sodium carbonate was used both as a prefilter to collect the particles and to trap arsenic trioxide. After dissolving the silver compounds in nitric acid, ICP emission spectrometry was used to carry out the analysis. This article describes the comparative sampling we performed in a microelectronic laboratory and in a fumigation chamber (130 samples) to determine the concentration of AgNO3 impregnation solution to be used, the detection limit of the method and the retention capacity of the impregnated filters. Interference with other gases reacting with silver nitrate was studied and the storage time for sampled filters and analysis solutions was checked. The detection limit of the adopted method is better than 1 microg per filter, and the retention capacity exceeds 300 microg per filter. The problem of how to sample phosphine when H2S, NH3, or HCl is present has been solved, but the problem of sampling phosphine in atmospheres where acetylene evolves remains. Sampled filters and filter solutions are stable for more than three months at ambient temperature.

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