Article ID Journal Published Year Pages File Type
10558214 Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy 2005 5 Pages PDF
Abstract
A new, low-cost nitrite sensor was developed by immobilizing a direct indicator dye in an optical sensing film for food and environmental monitoring. This sensor was fabricated by binding gallocyanine to a cellulose acetate film that had previously been subjected to an exhaustive base hydrolysis. The membrane has good durability (>6 months) and a short response time (<7 s). Nitrite can be determined for the range 0.008-1.50 μg/ml with 3δ detection limits of 1 ng/ml. The method is easy to perform and uses acetylcellulose as a carrier. The reagents used for activating the cellulose support are inexpensive, non-toxic and widely available.
Related Topics
Physical Sciences and Engineering Chemistry Analytical Chemistry
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