Repeatability tests were performed to ensure the reproducibility of the results. The performance of the devices for different urea concentrations (1mM, 1µM, 1nm and 1pM) is reported in the supporting information from Non-invasive paper-based microfluidic device for ultra-low detection of urea through enzyme catalysis Vignesh Suresh Ong Qunya Bera Lakshmi Kanta Lee Yeong Yuh Karen S. L. Chong 10.6084/m9.figshare.5944060.v1 https://rs.figshare.com/articles/journal_contribution/Repeatability_tests_were_performed_to_ensure_the_reproducibility_of_the_results_The_performance_of_the_devices_for_different_urea_concentrations_1mM_1_M_1nm_and_1pM_is_reported_in_the_supporting_information_from_Non-invasive_paper-based_microfluidic_devic/5944060 Plots of current vs time performed to demonstrate the repeatability and reproducibility of the results of the paper fluidic devices in sensing urea 2018-03-02 15:51:18 paper fluidics ultra-low detection urea point-of-care chemical sensor