A new fluorescence method for measuring cross‐fluctuation fo two non‐reactive components in a mixing device | Zendy

André Christophe | Zendy; David René | Zendy; Villermaux Jacques | Zendy; André JeanClaude | Zendy

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A new fluorescence method for measuring cross‐fluctuation fo two non‐reactive components in a mixing device

Author(s) -

André Christophe,

David René,

Villermaux Jacques,

André JeanClaude

Publication year - 1992

Publication title -

chemical engineering and technology

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.403

H-Index - 81

eISSN - 1521-4125

pISSN - 0930-7516

DOI - 10.1002/ceat.270150306

Subject(s) - tracer , fluorescence , mixing (physics) , chemistry , analytical chemistry (journal) , laser induced fluorescence , intensity (physics) , linear correlation , biological system , optics , chromatography , physics , mathematics , nuclear physics , statistics , quantum mechanics , biology

A novel method for measuring local deviations from perfect mixing of two non‐reative tracers is presented. It is based on the partially quenched fluorescence of one fluorescent tracer by a second tracer. When the concentration fluctuations are small, the deviation from the linear behaviour yields the cross‐correlation of the fluctuating components of the concentrations of both traces from an – easy to record – average value of fluorescence intensity obtained in the focus of a laser beam. The method was proven to be suitable for measuring these quantities in a 1125 cm 3 well‐stirred tank as a function of location and stirring speed.

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