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dc.contributor.authorSingla, M L-
dc.contributor.authorWalia, M S-
dc.contributor.authorSingh, Mewa-
dc.contributor.authorMahapatra, P K-
dc.contributor.authorPandey, Laxmi-
dc.contributor.authorJain, S C-
dc.identifier.issn0975-1084 (Online); 0022-4456 (Print)-
dc.description.abstractThe paper describes development of an optoelectronics system, which involves the use of ultra-bright yellow LED (λ, 583nm) as light source. BPW21 photodiode (relative spectral sensitivity, < 90 %, 500–600nm) is used as detector for measurement of formaldehyde concentration. The system is based on the reaction of formaldehyde with chromotropic acid in acidic medium. Violet colour, produced after the reaction, is used to measure the concentration (0.5 - 10 ±0.02 ppm) in water.en_US
dc.relation.ispartofseriesInt.Cl.7: G 01 N 21/27en_US
dc.sourceJSIR Vol.63(12) [December 2004]en_US
dc.subjectOptoelectronic systemen_US
dc.subjectPhoto detectoren_US
dc.subjectLog amplifieren_US
dc.titleFormaldehyde concentration measuring system: An optoelectronic deviceen_US
Appears in Collections:JSIR Vol.63(12) [December 2004]

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