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Applied Spectroscopy

Applied Spectroscopy

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  • Vol. 66, Iss. 3 — Mar. 1, 2012
  • pp: 341–346

A 5-kg Time-Resolved Luminescence Photometer with Multiple Excitation Sources

GUOYING CHEN

Applied Spectroscopy, Vol. 66, Issue 3, pp. 341-346 (2012)


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Abstract

A luminescence photometer was developed based on lanthanide-sensitized luminescence to detect environmental pollutants and residues in foods including, in particular, two classes of antibiotics: tetracyclines and fluoroquinolones. Multiple excitation sources, a xenon flashlamp and ultraviolet light-emitting diodes (UV LEDs), were used to their advantages. A photomultiplier tube module, gated to reject time-domain interferences, was used as a photodetector. Using danofloxacin as a model analyte, luminescence signal was linear in more than three decades (0.5-2000 ng/mL) with R2 > 0.998 in each decade. This photometer achieved a limit of detection of 2.0 ng/mL with 1.3% average relative standard deviation. It is field deployable at 4.6 kg and 15 W power consumption.

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Citation
GUOYING CHEN, "A 5-kg Time-Resolved Luminescence Photometer with Multiple Excitation Sources," Appl. Spectrosc. 66, 341-346 (2012)
http://www.opticsinfobase.org/as/abstract.cfm?URI=as-66-3-341


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