کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
7229576 1470924 2018 18 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Problems analysis and new fabrication strategies of mediated electrochemical biosensors for wastewater toxicity assessment
ترجمه فارسی عنوان
تجزیه و تحلیل مشکلات و استراتژی های جدید ساخت بویایی سنجنده های الکتروشیمیایی برای ارزیابی سمیت فاضلاب
کلمات کلیدی
بوسنسورهای الکتروشیمیایی متصل شده، ارزیابی سمیت آب عوامل دخالت،
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی آنالیزی یا شیمی تجزیه
چکیده انگلیسی
Conventional mediated electrochemical biosensors for toxicity assessment were almost based on 'one-pot' principle, i.e., mediators and the under-test chemicals were mixed together in the same vessel. In this process, the electron mediator is assumed to be merely an electron acceptor and cannot react with under-test toxicants. Actually,some under-test pollutants (such as metal ions) could react with the electron mediators, thus affecting the detection accuracy and sensitivity of the sensors. It was also found that at least two other interference factors have been ignored in present'one-pot' mediated electrochemical biosensor systems, i.e., (1) the electrochemical sensitivity of mediators to pH; and (2) the potential reactions between under-test chemicals and buffers and the consequent pH changes. In this study, the three ignored interference factors have been investigated systematically and demonstrated by significance tests. Moreover, a solving strategy, an isolation method, is proposed for fabrication of novel mediated electrochemical biosensor to avoid the interference factors existing at present mediated electrochemical biosensor. According to the testing results obtained from the isolation method, IC50 values of Cu2+, Cd2+, Zn2+, Fe3+, Ni2+ and Cr3+ were 21.3 mg/L, 3.7 mg/L, 26.7 mg/L, 4.4 mg/L and 10.7 mg/L, respectively. The detection results of four real water samples also suggested this method could be applied for the practical and complex samples.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Biosensors and Bioelectronics - Volume 108, 15 June 2018, Pages 82-88
نویسندگان
, , , , , , ,