Authors
Materials and Energy Research Center, Division of Semiconductors, Karaj, Iran.
Abstract
A new low cost vanadium sensor developed by immobilizing a direct indicator dye to porous and
transparent acetylcellulose film. This sensor was fabricated by binding gallocyanine to a cellulose acetate film that had
previously been subjected to an exhaustive base hydrolysis for 24h and increase the porosity of the membrane. The
cellulose membrane were immediately treated with mixture of 1.00 % (W/V) thiorea and 0.70% (W/V) poly (vinyl
alcohol) solution for 48 h at 25°C. The cellulose membrane were separately treated with 0.1% (W/V) solution of
gallocyanine at 25 °C with magnetic stirring of the solution for 14h. After washing, the films were dried at 45 °C for 20
min. Then the membrane have good durability (> 6 months), a short response time (<10 sec) and detection limit 0.003
microgram / ml. The method is easy to perform and uses acetylcellulose as a carrier. The reagents for activity the
cellulose support are inexpensive, non-toxic and widely available.
Keywords
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