This work reports on a modularized electrochemical method for the determination of the hormones cortisol, progesterone, testosterone and 17β-estradiol in urine. These hormones were employed as templates when generating molecular imprints from aniline and metanilic acid by electropolymerization on the surface of screen-printed electrodes. The electrically conductive imprint was characterized by SEM, AFM and cyclic voltammetry. A four-channel system was then established to enable simultaneous determination of the hormones by cyclic voltammetry. The detection limits for cortisol, progesterone, testosterone and 17β-estradiol are as low as 2, 2.5, 10 and 9 ag·mL−1 (for S/N = 3).
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The authors would like to appreciate the Ministry of Science and Technology of the Republic of China, Taiwan for financially supporting this research under contract nos. MOST 106-2221-E-390-013-MY3, 106-2314-B-390-001-MY2 and 107-2923-M-390-001-MY3.
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Lee, MH., Thomas, J.L., Liu, WC. et al. A multichannel system integrating molecularly imprinted conductive polymers for ultrasensitive voltammetric determination of four steroid hormones in urine. Microchim Acta 186, 695 (2019). https://doi.org/10.1007/s00604-019-3797-7
- Multichannel potentiostat
- Molecular imprinting
- Electrochemical sensing
- Urine analysis