Abstract
A new simple cloud point extraction/preconcentration method was developed for the HPLCMS/MS determination of disulfiram in synthetic urine. Some parameters with an effect on the extraction, such as the concentration of Triton X-114, pH influence, incubation time, equilibration temperature and centrifuging parameters, were studied and optimised. The method proposed for the HPLC-MS/MS determination of disulfiram in synthetic urine with preliminary cloud point extraction was validated. The calibration curve was linear in the range of 0.025–15.4 ng mL−1. The limits of detection (3σ) and quantification (10σ) were 0.008 ng mL−1 and 0.025 ng mL−1, respectively. The matrix effect (96 %), recovery of the extraction procedure (95 %) and overall “process efficiency” (91 %) were also estimated. The results show that the sensitivity, metrological characteristics, ecological safety, simplicity and convenience of the suggested procedure exceed its analogues based on extraction using organic solvents.
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Doroschuk, V.O., Grogul, A.B., Mandzyuk, Y.S. et al. Cloud point extraction of disulfiram for its HPLC-MS/MS determination in synthetic urine. Chem. Pap. 70, 1316–1321 (2016). https://doi.org/10.1515/chempap-2016-0074
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DOI: https://doi.org/10.1515/chempap-2016-0074