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10.1021/ac501490k http://scihub22266oqcxt.onion/10.1021/ac501490k C4215855!4215855 !24931319     free     free     free Warning: file_get_contents(https://eutils.ncbi.nlm.nih.gov/entrez/eutils/elink.fcgi?dbfrom=pubmed&id=24931319 &cmd=llinks): Failed to open stream: HTTP request failed! HTTP/1.1 429 Too Many Requests in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 215       Anal+Chem 2014 ; 86 (14 ): 6753-7 Nephropedia Template TP {{tp|p=24931319 |t=2014. Demonstration of fast and accurate discrimination and quantification of chemically similar species utilizing a single cross-selective chemiresistor |pdf=|usr=}}{{24931319 }} gab.com Text Demonstration of fast and accurate discrimination and quantification of chemically similar species utilizing a single cross-selective chemiresistor JO: Anal Chem http://www.kidney.de/pget.php?&tw=1&pmid=24931319 #FOAvip Performance characteristics of gas-phase microsensors will determine the ultimate utility of these devices for a wide range of chemical monitoring applications. Commonly employed chemiresistor elements are quite sensitive to selected analytes, and relatively new methods have increased the selectivity to specific compounds, even in the presence of interfering species. Here, we have focused on determining whether purposefully driven temperature modulation can produce faster sensor-response characteristics, which could enable measurements for a broader range of applications involving dynamic compositional analysis. We investigated the response speed of a single chemiresitive In2O3 microhotplate sensor to four analytes (methanol, ethanol, acetone, 2-butanone) by systematically varying the oscillating frequency (semicycle periods of 20-120 ms) of a bilevel temperature cycle applied to the sensing element. It was determined that the fastest response (? 9 s), as indicated by a 98% signal-change metric, occurred for a period of 30 ms and that responses under such modulation were dramatically faster than for isothermal operation of the same device (>300 s). Rapid modulation between 150 and 450 °C exerts kinetic control over transient processes, including adsorption, desorption, diffusion, and reaction phenomena, which are important for charge transfer occurring in transduction processes and the observed response times. We also demonstrate that the fastest operation is accompanied by excellent discrimination within a challenging 16-category recognition problem (consisting of the four analytes at four separate concentrations). This critical finding demonstrates that both speed and high discriminatory capabilities can be realized through temperature modulation. Twit Text FOAVip Demonstration of fast and accurate discrimination and quantification of chemically similar species utilizing a single cross-selective chemiresistor ????Anal Chem http://www.kidney.de/pget.php?&tw=1&pmid=24931319 #FOAvip Twit Text # Free Paper on # # # # # LINK http://www.kidney.de/pget.php?&tw=1&pmid=24931319 #FOAvip English Wikipedia <ref>{{Cite pmid|24931319 }}</ref> Demonstration of fast and accurate discrimination and quantification of chemically similar species utilizing a single cross-selective chemiresistor #MMPMID24931319 Vergara A ; Benkstein KD ; Montgomery CB ; Semancik S Anal Chem 2014[Jul]; 86 (14 ): 6753-7 PMID24931319 show ga Performance characteristics of gas-phase microsensors will determine the ultimate utility of these devices for a wide range of chemical monitoring applications. Commonly employed chemiresistor elements are quite sensitive to selected analytes, and relatively new methods have increased the selectivity to specific compounds, even in the presence of interfering species. Here, we have focused on determining whether purposefully driven temperature modulation can produce faster sensor-response characteristics, which could enable measurements for a broader range of applications involving dynamic compositional analysis. We investigated the response speed of a single chemiresitive In2O3 microhotplate sensor to four analytes (methanol, ethanol, acetone, 2-butanone) by systematically varying the oscillating frequency (semicycle periods of 20-120 ms) of a bilevel temperature cycle applied to the sensing element. It was determined that the fastest response (? 9 s), as indicated by a 98% signal-change metric, occurred for a period of 30 ms and that responses under such modulation were dramatically faster than for isothermal operation of the same device (>300 s). Rapid modulation between 150 and 450 °C exerts kinetic control over transient processes, including adsorption, desorption, diffusion, and reaction phenomena, which are important for charge transfer occurring in transduction processes and the observed response times. We also demonstrate that the fastest operation is accompanied by excellent discrimination within a challenging 16-category recognition problem (consisting of the four analytes at four separate concentrations). This critical finding demonstrates that both speed and high discriminatory capabilities can be realized through temperature modulation. |Acetone/analysis [MESH] |Butanones/analysis [MESH] |Chemistry Techniques, Analytical/*instrumentation/*methods [MESH] |Equipment Design [MESH] |Ethanol/analysis [MESH] |Kinetics [MESH] |Methanol/analysis [MESH]Demonstration of fast and accurate discrimination and quantification o(epmc).pdf DeepDyve Pubget Overpricing