This digital document is a journal article from Analytica Chimica Acta, published by Elsevier in . The article is delivered in HTML format and is available in your Amazon.com Media Library immediately after purchase. You can view it with any web browser.

Description:
A sensitive sensor for the determination of hydrogen peroxide (H"2O"2) was fabricated with MnO"2 nanoparticles (nano-MnO"2) and dihexadecyl hydrogen phosphate (DHP) composite film. The sensor exhibits high sensitivity, due to the enhanced oxidation of hydrogen peroxide (H"2O"2) at the MnO"2 nanoparticles and its uniform dispersion in DHP film. Amperometry was carried to determine the concentration of H"2O"2. The dependence of the response current on H"2O"2 concentration was explored under optimal conditions and an excellent linear concentration range of 1.2x10^-^7-2.0x10^-^3M with a substantially low detection limit of 8.0x10^-^8M was obtained. The proposed nano-MnO"2/DHP sensor has the feature of high sensitivity of 2.66x10^5@mAM^-^1cm^-^2. This sensor has been applied to measure the concentration of H"2O"2 in tooth paste and hair dye. According to the principle of Sensors with injectable recognition elements (SIRE), trace concentration of glucose in urine samples can also be calculated.