Jeon, Hyeon Jin Choi, Yong-Keun Song, Kyung-Guen Lee, Sang Hyun Yang, Yung-Hun Kim, Hyungsup Kim, Sunghyun Kumaran, Rangarajulu Hong, Seok Won Kim, Hyung Joo 2024-01-20T12:01:23Z 2024-01-20T12:01:23Z 2021-09-04 2013-08 0925-4005 https://pubs.kist.re.kr/handle/201004/127843 Herein, we present a novel photoelectrochemical sensor system for the rapid enumeration of algal biomass. The photosynthesis-based reducing action of algal cells on the electrochemical mediator 2-hydroxyl-1,4-naphthoquinone (HNQ) was used as the basis of an amperometric sensor system. By using a simple LED (Light-Emitting Diode) installed three-electrode cell, the mediator that was reduced by algal metabolic activity was reoxidized at a platinum-working electrode and held at a positive potential. In the presence of CO2 as an electron donor, and LED illumination as an energy source for the algal cells, the reoxidation current and its rate of increase were found to depend on the concentration of algal biomass. Regression analyses plotting the initial rate of current (mu A min(-1)) against algal biomass concentrations (g L-1) produced a reasonable correlation coefficient (r(2) = 0.9938). The sensor system exhibited a high sensitivity to algal biomass at a concentration as low as 0.065 g L-1 and a rapid response time, which is promising for further applications of the sensor system in algal-related industries. (c) 2013 Elsevier B.V. All rights reserved. English ELSEVIER SCIENCE SA Development of a photoelectrochemical sensor for monitoring algal biomass (Chlorella vulgaris) Article 10.1016/j.snb.2013.05.026 1 SENSORS AND ACTUATORS B-CHEMICAL, v.185, pp.405 - 410 SENSORS AND ACTUATORS B-CHEMICAL 185 405 410 N scie scopus 000321509600056 2-s2.0-84878866705 Chemistry, Analytical Electrochemistry Instruments & Instrumentation Chemistry Electrochemistry Instruments & Instrumentation Article THYLAKOID MEMBRANES SYNECHOCOCCUS SP CURRENT OUTPUT FUEL-CELLS FLUORESCENCE PERFORMANCE BIOSENSOR LIGHT Photoelectrochemical sensor Algal biomass Algae detection sensor 2-Hydroxyl-1,4-naphthoquinone Chlorella vulgaris