Indicators for the optical measurement of sulphur dioxide gas

Ashutosh Sharma; Zulfiqur Ali; Daniel McStay

doi:10.1117/12.59348

1 May 1992 Indicators for the optical measurement of sulphur dioxide gas

Ashutosh Sharma, Zulfiqur Ali, Daniel McStay

Proceedings Volume 1637, Environmental and Process Monitoring Technologies; (1992) https://doi.org/10.1117/12.59348
Event: OE/LASE '92, 1992, Los Angeles, CA, United States

Abstract

A number of fluorophores were investigated for their suitability to be employed as indicators in SO₂ measurement. Several indicators, including PAll's, 5(and 6) carboxy-4'-5'-dimethyl fluorescein, new fuschin, hydrazine hydrochloride and chioropyridine hydrochloride, showed decrease in the fluorescence intensity with increase in SO₂ concentration. Fluorescence quenching of benzopurpurin by 502 is found to be extremely efficient, with a little or no interference from the other toxic gases NH₃ and H₂S. These results are analyzed using Stem-Volmer relation. The fmding is considered to be of potential utility for the development of an improved fibre optic SO₂ sensor/probe.

Citation Download Citation

Ashutosh Sharma, Zulfiqur Ali, and Daniel McStay "Indicators for the optical measurement of sulphur dioxide gas", Proc. SPIE 1637, Environmental and Process Monitoring Technologies, (1 May 1992); https://doi.org/10.1117/12.59348

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