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Personal monitors for inorganic gases.

Authors
West-PW
Source
Louisiana State University, Baton Rouge, Louisiana, Final Progress Report 1979:24 pages
Link
NIOSHTIC No.
00181029
Abstract
Successful passive sampling techniques were developed for ammonia (7664417) and hydrogen-cyanide (74908). For ammonia the collection of the sample required permeation through a silicone membrane into boric-acid. Spectrophotometric determination of the ammonia was carried out using Nessler's reagent or potentiometrical means with an ion selective electrode. Linearity was demonstrated using this monitor over concentration ranges of less than 10 to over 160 parts per million. The ammonia monitor was relatively free from interference by amines and could be used in a badge type monitor, as it was very light in weight and compact. It was relatively inexpensive for use as an occupational monitoring tool. The hydrogen-cyanide monitor functioned by permeation through a silicone membrane. The permeated gas was stabilized in sodium-hydroxide and determined by means of a standard pyridine/barbituric-acid colorimetric method. A detection limit of 10 parts per billion for an 8 hour exposure was obtained. Difficulties were encountered in developing a sampler for hydrogen-sulfide (7783064) because the chemical is very sensitive to changes in humidity and other environmental stresses.
Keywords
NIOSH-Grant; Air-quality-monitoring; Air-sampling-equipment; Air-sampling-techniques; Monitors; Toxic-gases; Cyanides
Contact
Chemistry Louisiana State Univ A&M Coll 111 Coates Laboratories Baton Rouge, LA 70803
CAS No.
7664-41-7; 74-90-8; 7783-06-4
Publication Date
19790101
Document Type
Final Grant Report
Funding Amount
149958
Funding Type
Grant
Fiscal Year
1979
NTIS Accession No.
PB88-247754
NTIS Price
A03
Identifying No.
Grant-Number-R01-OH-00666
NIOSH Division
OEP
Source Name
Louisiana State University, Baton Rouge, Louisiana, Final Progress Report
State
LA
Performing Organization
Louisiana State Univ A&M Col Baton Rouge, Baton Rouge, Louisiana
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