Electrochemical detection of nitrite using urchin-like palladium nanostructures on carbon nanotube thin film electrodes

A biosensor platform for soil management: the case of nitrites

“…The minisensor developed has been successfully validated for soil using simulated and real field samples. The detection limit achieved with the sensor (at S/N ¼ 3) for soil extracts was 2.1 mg/L, significantly lower that the detection limits reported for spectroscopic (Sreekumar et al, 2003;Ensafi et al, 2004;L opez Pasquali et al, 2010), chromatographic (Michalski and Kurzyca, 2006;Niedzielski et al, 2006;Kodamatani et al, 2011) and electrochemical (Salimi et al, 2008;Pietrzak and Meyerhoff, 2009;Pham et al, 2011) approaches. Biosensor systems for nitrites have been also suggested in literature (Chen et al, 2009;Liu et al, 2009;Silveira et al, 2010;Tepper, 2010) with comparable detection limits.…”

“…Electrochemistry provides detection limits comparable to chromatography with less complicated and timeconsuming formats that have higher chances of developing into field instruments despite the low tolerance to common ions. Reported values vary with sample matrix and detection method, ranging between 46 mg/L (Salimi et al, 2008) and 92 mg/L (Pietrzak and Meyerhoff, 2009);Pham et al (2011) proposed a carbon nanotube thin film system that decreased detectability to 10 mg/L.…”

Concurrent Electrocatalysis and Sensing of Hydrazine and Sulfite and Nitrite Ions using Electrodeposited Gold Nanostructure-Modified Electrode

“…Compounds containing SO 3 2-ions are used as preservatives in view of their antioxidant properties and as inhibitors of enzymatic and microbial activities in beverages, food, and pharmaceutical products [10]. The NO 2 -ion is a typical inorganic pollutant and its sources include wastes from fertilizer and preservative industries and adulterants in food [11][12][13][14]. Therefore, it is important and desirable to design and develop a catalyst for the concurrent detection and determination of N 2 H 4 , SO 3 2-, and NO 2 -present in food, water, biological fluids, etc.…”

“…Therefore, it is important and desirable to design and develop a catalyst for the concurrent detection and determination of N 2 H 4 , SO 3 2-, and NO 2 -present in food, water, biological fluids, etc. Electrochemical techniques have been found to be the most promising methods for the determination of N 2 H 4 , SO 3 2-, and NO 2 - [12]. Electrochemical oxidation of these analytes at a bare electrode is normally accompanied with a high overpotential, which represents a slug-gish electron transfer process.…”

A Solid-contact Pb²⁺-selective Electrode with Carbon Nanotubes by Electrodeposition as Ion-to-electron Transducer

“…Carbon nanotubes (CNTs) as solid-contact in the Ionselective electrodes have several outstanding properties, which have been widely studied as a key element in electromechanical actuators, 13,14 super capacitors, 15,16 batteries 17 and electrochemical sensors. [18][19][20] Though CNTs have been tested as transducers in potentiometric analysis, many investigations were focused on the development of new methods for the fabrication of CNTs conductive layer. Spraying is widely used to make layers of CNTs.…”