Please use this identifier to cite or link to this item:
http://nopr.niscpr.res.in/handle/123456789/5486| Title: | Formaldehyde concentration measuring system: An optoelectronic device |
| Authors: | Singla, M L Walia, M S Singh, Mewa Mahapatra, P K Pandey, Laxmi Shailja Jain, S C |
| Keywords: | Optoelectronic system;LED;Photo detector;Log amplifier;Formaldehyde |
| Issue Date: | Dec-2004 |
| Publisher: | CSIR |
| IPC Code: | Int.Cl.7: G 01 N 21/27 |
| 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. |
| Page(s): | 989-991 |
| ISSN: | 0975-1084 (Online); 0022-4456 (Print) |
| Appears in Collections: | JSIR Vol.63(12) [December 2004] |
Files in This Item:
| File | Description | Size | Format | |
|---|---|---|---|---|
| JSIR 63(12) 989-991.pdf | 152.42 kB | Adobe PDF | View/Open |
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