Analysis of oxytetracycline in surface water using a portable analyzer

Guoying Chen; Susan Braden; Feng Qin

doi:10.1117/12.686401

25 October 2006 Analysis of oxytetracycline in water using a portable analyzer

Guoying Chen, Susan Braden, Feng Qin

Proceedings Volume 6378, Chemical and Biological Sensors for Industrial and Environmental Monitoring II; 63780W (2006) https://doi.org/10.1117/12.686401
Event: Optics East 2006, 2006, Boston, Massachusetts, United States

Abstract

Oxytetracycline (OTC) is extensively used in aquaculture worldwide for preventive and therapeutic purposes. Most of the drug, however, is discharged into the marine environment due to leaching from medicated feed and poor gastrointestinal (GI) absorption. Without exposure to sun light OTC has a long lifetime in the marine environment, therefore it is important to monitor and study its occurrence, distribution, fate and impact on the ecosystem. A portable tetracycline (TC) analyzer was developed in this laboratory for this purpose based on europium-sensitized luminescence. In this study, an assay method is developed for OTC analysis in water using this instrument. Water samples are filtered with glass wool; and solid phase extraction (SPE) is performed using Oasis HLB cartridges for OTC extraction and cleanup. Following reagent application, the samples are excited by 385 nm LED pulses; and time-resolved luminescence (TRL) is measured at 610 nm by a photomultiplier tube. A 0-3 ppm linear dynamic range (r² = 0.9988) and a 0.021 ppb limit of detection were achieved with a typical <5% relative standard deviation.

Citation Download Citation

Guoying Chen, Susan Braden, and Feng Qin "Analysis of oxytetracycline in water using a portable analyzer", Proc. SPIE 6378, Chemical and Biological Sensors for Industrial and Environmental Monitoring II, 63780W (25 October 2006); https://doi.org/10.1117/12.686401

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