Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
10558214 | Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy | 2005 | 5 Pages |
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
Authors
A. Kazemzadeh, S. Daghighi,