کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
744664 894398 2011 5 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Investigation of polyviologens as oxygen indicators in food packaging
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی آنالیزی یا شیمی تجزیه
پیش نمایش صفحه اول مقاله
Investigation of polyviologens as oxygen indicators in food packaging
چکیده انگلیسی

A triggered oxygen indicator, formulated from a combination of electrochrome, titanium dioxide and EDTA, was evaluated for use in modified atmosphere packaging. Methylene blue was not an ideal electrochrome due to its slow reduction to the leuco form and fast subsequent oxidation by oxygen present at low concentrations, >0.1%. Polyviologen electrochromes showed much faster reduction after exposure to UV light. Thionine and 2,2′-dicyano-1,1′-dimethylviologen dimesylate, which have more anodic reduction potentials compared to methylene blue, can be used to produce oxygen indicators with decreased sensitivity to oxygen. These indicators can be used to detect oxygen even when levels increase up to 4.0%.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Sensors and Actuators B: Chemical - Volume 152, Issue 1, 20 February 2011, Pages 63–67
نویسندگان
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