Formaldehyde concentration measuring system: an optoelectronic device

Singla, M.L. and Walia, M.S. and Singh, M. and Mahapatra, P.K. and Pandey, Laxmi and Shailja, . and Jain, S.C. (2004) Formaldehyde concentration measuring system: an optoelectronic device. Journal of Scientific & Industrial Research, 63 (12). pp. 989-991. ISSN 0022-4456

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Official URL: http://nopr.niscair.res.in/handle/123456789/5189

Abstract

The 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

Item Type: Article
Uncontrolled Keywords: Optoelectronic system;LED;Photo detector;Log amplifier;Formaldehyde
Subjects: CSIO > Chemistry
Depositing User: Ms. Narinder Kaur
Date Deposited: 05 Mar 2012 11:54
Last Modified: 16 Apr 2012 10:29
URI: http://csioir.csio.res.in/id/eprint/43

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