Abstract
A screen-printing algal biosensor was fabricated for a toxicity test. An algal ink was prepared by mixing algal cells, carbon nanotube and sodium alginate solution. The algal ink was printed on the carbon electrode surface using screen printing technique. The electrode was immersed in CaCl2 solution for gelation. Photosynthetically generated oxygen of the immobilized algae was monitored amperometically. Responses of the algal biosensor to a toxic compound, 6-chloro-N-ethyl-N-isopropyl-1,3,5-triazine-2,4 diamine (atrazine) were evaluated as inhibition ratios of the reduction current.
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