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  • Title: A simple method for the determination of ethylene-thiourea (ETU) in biological samples.
    Author: Debbarh I, Moore N.
    Journal: J Anal Toxicol; 2002; 26(4):216-21. PubMed ID: 12054362.
    Abstract:
    A direct, simple, and rapid high-performance liquid chromatographic method has been developed for the determination of ethylene-thiourea (ETU) in biological fluids. Samples were chromatographed on a Lichrosorb RP8 (5 pm) column after extraction with dichloromethane. The mobile phase was a mixture of hexane/isopropyl alcohol/ethyl alcohol (93:6:1 v/v) added with 0.6 mL/L butylamine. Detection was done with a UV detector set at 243 nm. This method was validated to standard criteria. Calibration curves for ETU in 100 microL of 0.9% saline, 500 microL plasma, and 10 mL urine were linear (r2 > 0.99) from 0.05 to 30 microg/mL, 0.025 to 30 microg/mL, and 1 to 100 ng/mL, respectively. The lower limit of detection was 20 ng/mL in plasma, 25 ng/mL in 0.9% saline, and 0.5 ng/mL in urine.
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