کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
9700880 | 1462131 | 2005 | 7 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Composites: A novel alternative to construct solid state Ag/AgCl reference electrodes
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موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی آنالیزی یا شیمی تجزیه
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چکیده انگلیسی
An Ag/AgCl solid-state reference electrode is developed by means of a graphite-AgCl-Silver dag-epoxy resin composite. The response of the composite reference electrode (CRE) to chloride ions is evaluated; a linear non-nernstian response is observed associated to the following equation E = â15.15 (±1.10) â 44.05 (±0.38) log[Clâ]. Comparing the CRE's response potential versus a saturated commercial Ag/AgCl reference in KCl 0.1 M, a mean of 40.7 ± 0.4 mV of the distribution of potential versus time data is observed over a period of 1 h. The performance of the CRE as reference for a glass membrane electrode by means of direct pH measurements and quantitative determination of acids by acid-base titrations is evaluated obtaining statistically stable, precise and exact results compared with those obtained using a combined glass electrode. The typical cylindrical configuration of the CRE is changed to adapt it to a FIA system for the determination of ammonium ion, obtaining a sensitivity 50.30 ± 0.26 mV/log[NH4+] and a linear range 8.5 Ã 10â5 to 0.1 M, which are analytical parameters statistically equivalent to those presented by the classical determination system.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Sensors and Actuators B: Chemical - Volume 110, Issue 2, 14 October 2005, Pages 264-270
Journal: Sensors and Actuators B: Chemical - Volume 110, Issue 2, 14 October 2005, Pages 264-270
نویسندگان
Gabriela Valdés-RamÃrez, Giaan A. Álvarez-Romero, Carlos Andrés Galán-Vidal, Pablo Rogelio Hernández-RodrÃguez, MarÃa Teresa RamÃrez-Silva,