Ethanol, detection

Yan Y and Bein T. Molecular-sieve sensors for selective ethanol detection. Chem Mater 1992 4(5) 975-977. 

Conjugated bile acids and bile alcohols were analyzed by TLC using silica gel G plates (Brinkmann Instruments, Westbury, NJ 0.25-mm thickness) with the solvent system chloroform/methanol/acetic acid/water 26 8 4 2 (v/v/vA) (5,7,9). Bile salts were made visible with a spray reagent which consisted of 10 % phosphomolybdic acid in ethanol. Detection with naphthoresorcinol (0.2 % in... 

Thin films of Pt-doped-Sn02 have been deposited in the temperature range 320 0 °C by MOCVD, using SnEt4 and Pt(hfa)2 hfa = hexafluoroacetylacetonato in an O2 atmosphere. This material was much more sensitive than Sn02 for ethanol detection in dry air. ... 

FIGURE 11.33 Nanoporous SIL-1 only cantilevers for sensing applications, (a) SEM top view images of SIL-1 cantilevers released by wet etching (b) sensor performance for ethanol detection in the gas phase in comparison with conventional Si cantilevers coated with individual SIL-1 crystals. 

Perinotto, A.C., Caseli, L., Hayasaka, C.O., Riul, Jr., A., Oliveira, Jr., O.N., Zucolotto, V. Dendrimer-assisted immobilization of alcohol dehydrogenase in nanostructured films for biosensing Ethanol detection using electrictil capacitance measurements. Thin Solid Films 516, 9002-9005 (2008)... 

A different approach for the preparation of iron oxide powders has been presented by Liu et al. first, an iron hydroxide precipitate was obtained after addition of aqueous ammonia to a solution of iron nitrate in water. Then the precipitate was dialyzed to remove undesired ions, and after peptization a stable sol was obtained. Crystalline a-Fe20s was prepared by evaporating the solution and annealing the resulting gel at high temperatures. These powders were then used to prepare conductometric sensing devices that show good sensitivity and selectivity for ethanol detection at temperatures lower than 400 °C [27]. 

Undoped p-type anatase has also been prepared through the sol-gel method, by reacting titanium isopropoxide and HCl in ethanol, and depositing thin films through dip coating. Surprisingly, the authors do not discuss the reason for such behavior, but they present sensing results for ethanol detection that support the p-type nature of the prepared anatase films [89]. 

An electrogenerated chemiluminescence (ECL) biosensor based on polymer-MWNT nanocomposites was prepared by y-irradiation polymerization for ethanol sensing. A higher sensing efficiency for ethanol using the ECL biosensor prepared with PAAc-MWCNT nanocomposites was measured compared with that of an ECL biosensor prepared with PMAc-MWCNT nanocomposites and purified MWCNTs. Experimental parameters affecting ethanol detection were also examined in terms of pH and the content of PAAc-MWCNT nanocomposites in Nafion. Little interference from other compounds was observed for the assay of ethanol. The results suggest that this ECL biosensor could be applied for ethanol detection in real samples. 

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