An automated salting-out assisted liquid-liquid microextraction approach using 1-Octylamine (cas 111-86-4): On-line separation of tetracycline in urine samples followed by HPLC-UV determination
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Add time:08/23/2019 Source:sciencedirect.com
An automated salting-out assisted liquid-liquid microextraction (SALLME) procedure based on a flow system was developed as new approach for pretreatment of complex sample matrix. In this procedure 1-octylamine was investigated as novel extractant for the SALLME. The procedure involved aspiration of the 1-octylamine and sample solution into a mixing chamber of a flow system followed by their air-bubble mixing resulting to isotropic solution formation. To provide phase separation a salting-out agent solution was added into the mixing chamber. After phase separation, the micellar 1-octylamine phase containing analyte was mixed with methanol and transported to a HPLC-UV system. To demonstrate the efficiency of the suggested approach, the automated procedure was applied for the HPLC-UV determination of tetracycline as a proof-of-concept analyte in human urine samples. Under the optimal conditions, the detector response of the analytes was linear in the concentration ranges of 0.5–20 mg L−1. The limit of detection, calculated from a blank test based on 3σ, was 0.17 mg L−1. The results demonstrate that the developed approach is highly cost-effective, simple and rapid.
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