Sulfur containing sensors

Interest in these studies arises from fundamental research where monolayers serve as models of biomimetic systems, as well as from important apphcations of such systems in molecular and bioelectronic devices, in sensors construchons, corrosion/inhibition phenomena, and synthesis of nanostructures ]93]. Although self-assembly processes of sulfur-containing compounds occur at the surfaces of many metals, especially the copper-group metals (Cu, Ag, Au), the most extensive studies have been... 

Electrochemical sensors are also used to monitor the emissions from combustion processes. Because the oxidizer for most combustion processes is air, which contains 78% nitrogen, NO. gases are common components of the exhaust and their concentrations must be minimized [398, 399]. In addition, incomplete combustion can result in CO or hydrocarbon gaseous compounds in the exhaust gas, which both represent unconverted chemical energy and are hazardous to the environment. The use of sulfur-containing fuels can lead to the formation of SO gases [400], which have a detrimental impact on the environment, such as promoting acid rain. 

Hart, J.P. and A.K. Abass (1997). A disporsable amperometric gas sensor for sulfur-containing compounds based on a chemically modified screen printed carbon electrode coated with hydrogel. Anal. Chim. Acta 342(2-3), 199-206. 

In PET-4, the crown does not contain nitrogen atoms but four sulfur atoms and is known for its strong affinity towards Cu11. This sensor is also based on the PET... 

Two disparate translation methods are investigated for the measurement of sulfur dioxide. Both involve interaction with an aqueous solution. In the first, collected S(IV) is translated by the enzyme sulfite oxidase to which is then measured by an enzymatic fluorometric method. The method is susceptible to interference from i CWg) efforts to minimize this interference is discussed. The second method involves the translation of SO2 into elemental Hg by reaction with aqueous mercurous nitrate at an air/liquid interface held in the pores of hydrophobic membrane tubes. The liberated mercury is measured by a conductometric gold film sensor. Both methods exhibit detection limits of 100 pptv with response times under two minutes. Ambient air measurements for air parcels containing sub-ppbv levels of SO2 show good correlation between the two methods. 

Many industrial atmospheres contain contaminants such as silicones, organic lead, sulfur compounds, and halogens which can poison catalytic sensors. Manufacturers go to great lengths in the design of these units to minimize loss of sensor activity from such influences.1 Means taken to keep water, corrosive liquids, and dirt from entering sensors involve the installation of membranes before the flame arrestor in front of the detector filament.2... 

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