کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
869717 909837 2006 11 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Amperometric tyrosinase biosensor based on polyacrylamide microgels
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی آنالیزی یا شیمی تجزیه
پیش نمایش صفحه اول مقاله
Amperometric tyrosinase biosensor based on polyacrylamide microgels
چکیده انگلیسی

An amperometric enzyme sensor using tyrosinase (PPO) entrapped in polyacrylamide microgels has been developed for determination of phenolic compounds. Polyacrylamide microgels were obtained by the concentrated emulsion polymerization method. The crosslinking of the polymer matrix optimum to retain the enzyme and to allow the diffusion of the compounds involved in the enzyme reaction has been studied (4.0%) as well as the influence on the response of analytical parameters such as pH, temperature, enzyme load and working potential. The useful lifetime of the biosensor was 27 days and it was useful to determine monophenolics compounds (e.g. cresol, chlorophenol) and diphenolics compounds (e.g. catechol and dopamine) by amperometric measurements at −100 mV (versus SCE) in a batch system. The results showed that the substrate structures have a great influence on the sensor response.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Biosensors and Bioelectronics - Volume 22, Issue 3, 15 September 2006, Pages 429–439
نویسندگان
, , , ,