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earth GRL

Organic Geochemistry Research Laboratory
LCAB: Antibiotic Method


Antiboitics are used for human health and livestock management and health. The increase of antibiotic resistant infections has resulted in concern that sub-therapeutic use of antibiotics for weight gain in livestock and the release of low levels of antibiotics into surface and groundwater from urban and agricultural sources may be contributing to this problem.


  • Sample collection requirements: 3-125mL (4oz) amber glass bottles with Teflon lined caps per sample. Samples submitted for the LCAB method also need to include identifiers on the bottle labels as indicated below:
    • Please include one of the following:
    • (WWTP) Waste Water Treatment Plant
    • (DWTP) Drinking Water Treatment Plant
    • (GW) Groundwater
    • (SW) Surface water

    • Also, one of the following would be most typical:
    • Influent (for samples collected from WWTP)
    • Effluent (for samples collected from WWTP)
    • Source (for samples collected from DWTP)
    • Intake (for samples collected from DWTP)
    • Finish (for samples collected from DWTP)
    • Groundwater
    • Surface Water

    If samples are being collected at locations within a treatment plant please signify, for example, post chlorination DWTP

  • Instrumentation: Liquid Chromatography/Tandem Mass Spectrometry
  • Data results uploaded to QWDX upon request

Compound Name Reporting Limit Parameter Code Method Code CAS #
Fluoroquinolines
Ciprofloxacin 0.005 μg/L 62898 LCM48 85721-33-1
Enrofloxacin 0.005 μg/L 66495 LCM48 93106-60-6
Lomefloxacin 0.005 μg/L 62900 LCM48 98079-51-7
Norfloxacin 0.005 μg/L 62757 LCM48 70458-96-7
Ofloxacin 0.005 μg/L 62899 LCM48 82419-36-1
Sarafloxacin 0.005 μg/L 62771 LCM48 98105-99-8
Macrolides
Azithromycin 0.005 μg/L 62792 LCM48 117772-70-0
Erythromycin 0.008 μg/L 62797 LCM48 114-07-8
*Erythromycin-H2O 0.005 μg/L 63674 LCM48 23893-13-2
Roxithromycin 0.005 μg/L 62895 LCM48 80214-83-1
Tylosin 0.010 μg/L 62896 LCM48 1401-69-0
Virginiamycin 0.005 μg/L 62897 LCM48 11006-76-1
Sulfonamides
Sulfachloropyridazine 0.005 μg/L 62774 LCM48 80-32-0
Sulfadiazine 0.100 μg/L 62963 LCM48 68-35-9
Sulfadimethoxine 0.005 μg/L 62776 LCM48 122-11-2
Sulfamethoxazole 0.005 μg/L 62775 LCM48 723-46-6
Sulfamethazine 0.005 μg/L 61762 LCM48 57-68-1
Suflathiazole 0.050 μg/L 62778 LCM48 72-14-0
Tetracyclines
Chlorotetracycline 0.010 μg/L 61744 LCM48 64-72-2
Oxytetracycline 0.010 μg/L 61759 LCM48 6153-64-6
Tetracycline 0.010 μg/L 62781 LCM48 60-54-8
Doxycycline 0.010 μg/L 62694 LCM48 564-25-0
*Epi-chlorotetracycline 0.010 μg/L 63731 LCM48 --
*Epi-iso-chlorotetracycline 0.010 μg/L 64047 LCM48 --
*Epi-oxytetracycline 0.010 μg/L 63729 LCM48 35259-39-3
*Epi-tetracycline 0.010 μg/L 63727 LCM48 79-85-6
*Iso-chlorotetracycline 0.010 μg/L 64175 LCM48 514-53-4
Pharmaceuticals
Carbamazepine 0.005 μg/L 62793 LCM48 298-46-4
Ibuprofen 0.050 μg/L 62014 LCM48 15687-27-1
Other
Chloroamphenicol 0.100 μg/L 65194 LCM48 56-75-7
Lincomycin 0.005 μg/L 62894 LCM48 154-21-2
Ormetoprim 0.005 μg/L 62962 LCM48 6981-18-6
Trimethoprim 0.005 μg/L 62023 LCM48 738-70-5
*degradation product

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