✦ LIBER ✦

Fiber optic sensor for NOX

✍ Scribed by Mark K. Freeman; Leonidas G. Bachas

Publisher: Elsevier Science
Year: 1992
Tongue: English
Weight: 607 KB
Volume: 256
Category: Article
ISSN: 0003-2670
DOI: 10.1016/0003-2670(92)85354-9

No coin nor oath required. For personal study only.

✦ Synopsis

Aquocyanocobmanude

was used as a selechve reagent m the development of a fiber-optc gas sensor for NO, TIus reagent was trapped m front of a bifurcated fiber-optic bundle by using a gas-permeable membrane NO, species were generated by the addition of a known amount of mtrite to an aclchc sample solution (pH 1 7) These gaseous species chffused through the gas-permeable membrane mto the buffered reagent solutlon (pH > 5) and were partially converted back to mtnte, wluch replaced the water molecule as the axial hgand m aquocyanocobmanude Two wavelengths (355 and 550 nm) were used to momtor the hgand exchange DetectIon hrnlts as low as 5 x 10e6 M mtnte were obtamed wlule momtonng the sensor at 550 nm The select]Wy for NO, species was greatly Improved over a potentlometrlc sensor based on pH detechon

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