کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
746998 894492 2007 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Solid-contact potentiometric polymer membrane microelectrodes for the detection of silver ions at the femtomole level
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی آنالیزی یا شیمی تجزیه
پیش نمایش صفحه اول مقاله
Solid-contact potentiometric polymer membrane microelectrodes for the detection of silver ions at the femtomole level
چکیده انگلیسی

In recent years, ion-selective electrodes based on polymer membranes have been shown to exhibit detection limits that are often in the nanomolar concentration range, and thus drastically lower than traditionally accepted. Since potentiometry is less dependent on scaling laws that other established analytical techniques, their performance in confined sample volumes is explored here. Solid-contact silver-selective microelectrodes, with a sodium-selective microelectrode as a reference, were inserted into a micropipette tip used as a 50-μl sample. The observed potential stabilities, reproducibilities and detection limits were attractive and largely matched that for large 100-ml samples. This should pave the way for further experiments to detecting ultra-small total ion concentrations by potentiometry, especially when used as a transducer after an amplification step in bioanalysis.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Sensors and Actuators B: Chemical - Volume 121, Issue 1, 30 January 2007, Pages 135–141
نویسندگان
, , ,