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@article{1407745, author = {Komendová, Martina and Metelka, Radovan and Urban, Jiří}, article_location = {Amsterdam, Netherlands}, article_number = {AUG 2017}, doi = {http://dx.doi.org/10.1016/j.chroma.2017.06.057}, keywords = {Dopamine; Electrochemical detection; Integrated column; Polymer monoliths; Urine}, language = {eng}, issn = {0021-9673}, journal = {Journal of Chromatography A}, title = {Monolithic capillary column with an integrated electrochemical detector}, url = {https://www.sciencedirect.com/science/article/pii/S0021967317309251?via%3Dihub}, volume = {1509}, year = {2017} }
TY - JOUR ID - 1407745 AU - Komendová, Martina - Metelka, Radovan - Urban, Jiří PY - 2017 TI - Monolithic capillary column with an integrated electrochemical detector JF - Journal of Chromatography A VL - 1509 IS - AUG 2017 SP - 171-175 EP - 171-175 PB - Elsevier SN - 00219673 KW - Dopamine KW - Electrochemical detection KW - Integrated column KW - Polymer monoliths KW - Urine UR - https://www.sciencedirect.com/science/article/pii/S0021967317309251?via%3Dihub L2 - https://www.sciencedirect.com/science/article/pii/S0021967317309251?via%3Dihub N2 - The carbon fiber and silver microwire were used as working and pseudoreference electrode, respectively, and inserted into the ending of capillary to prepare monolithic capillary column with an integrated electrochemical detector. Prepared capillary devices offered stable and robust results with relative standard deviations of retention, resolution, and detection signal lower than 1.5, 5.5, and 5.0%, respectively. To further increase sensitivity of developed electrochemical microdetector, multiple pulse amperometry detection mode has been used. Optimized integrated device provided reliable chromatographic separation of mixture of neurotransmitters with calibration curve for dopamine linear from 0.5 to 20.0 mg L-1 and an instrumental limit of detection as low as 24 pg of injected dopamine. Finally, developed capillary column was applied to successful determination of dopamine in a human urine. By using both calibration curve and standard addition method, the dopamine level was determined to be 0.74 +/- 0.03 mgL(-1) and 0.71 +/- 0.02 mgL(-1), respectively. Triplicates of dopamine analysis provided relative standard deviations lower than 2.7% for intraday analyses, while interday relative standard deviations were lower than 3.6% for five consecutive days. (C) 2017 Elsevier B.V. All rights reserved. ER -
KOMENDOVÁ, Martina, Radovan METELKA a Jiří URBAN. Monolithic capillary column with an integrated electrochemical detector. \textit{Journal of Chromatography A}. Amsterdam, Netherlands: Elsevier, 2017, roč.~1509, AUG 2017, s.~171-175. ISSN~0021-9673. Dostupné z: https://dx.doi.org/10.1016/j.chroma.2017.06.057.
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