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Title: Silica Gel Detector Tubes for Toxic Chemicals and Their Evaluation
Authors: Singh, Beer
Bhise, P P
Suryanarayana, M V S
Yadav, S S
Rao, V K
Polke, B G
Pandey, D
Ganesan, K
Rao, N B S N
Issue Date: Jan-1999
Publisher: NISCAIR-CSIR, India
Abstract: Silica gel of surface area, 250-400 m2/g was impregnated with different chemicals andused in detector tubes to detect different toxic gases like ammonia, hydrogen cyanide, cyanogen chloride, phosgene and sulphur mustard with the detection limits achieved being 0.00497 mg/1, 0.00500 mg/1, 0.00522 mg/1, 0.00500 mg/1 and 00.00045 mg/1 respectively. These detector tubes offered very low air way resistance when compared with those of foreign origin. However, detection limits were found to be a little lower when tested with the generated gas mixtures. Shelf life of indigenous detector tubes was found to be 2 y generally with the exception of hydrogen cyanide detector tubes, the latter being 16 months.
Page(s): 25-30
ISSN: 0975-1084 (Online); 0022-4456 (Print)
Appears in Collections:JSIR Vol.58(01) [January 1999]

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