Active carbon, hydrogen peroxide determination

Active carbon, hydrogen peroxide determination, 638 Active oxygen see Peroxide value ACV see Acidity value... 

Elstner EF, Staffer C, Heupel A (1975) Determination of superoxide free radical ion and hydrogen peroxide as products of photosynthetic oxygen reduction. Z Naturforsch 30c 53-57 Emmel T, Sand W, Konig WA, Bock E (1986) Evidence for the existence of a sulphur oxygenase in Sulfolobus brierleyi. J Gen Microbiol 132 3415-3420 Ensign SA, Hyman MR, Arp DJ (1993) In vitro activation of ammonia monooxygenase from Nitrosomonas europaea by copper. J Bacteriol 175 1971-1980 Erickson RH, Hooper AB (1972) Preliminary characterization of variant CO-binding heme protein from Nitrosomonas. Biochim Biophys Acta 275 231-244 Erickson RH, Hooper AB, Terry KR (1972) Solubilization and purification of cytochrome a, from Nitrosomonas. Biochim Biophys Acta 283 155-166 Evans MCW, Buchanan BB, Amon DI (1966) A new ferredoxin-dependent carbon reduction cycle in a photosynthetic bacterium. Proc Natl Acad Sci USA 55 928-934 Falk JE (1964) Porpyrins and metalloporphyrins. Elsevier, Amsterdam... 

LC combined with postcolumn chemiluminescence detection has also been applied to the determination of trace N-nitrosamines in groundwater The method combines solid-phase extraction (SPE) on to a mini-activated carbon column, followed by elution with acetone and concentration of the extracts by denitro-sation and fluorogenic derivatization. Peroxyoxalate chemiluminescence detection was carried out by using bis(2-nitrophenyl) oxalate and hydrogen peroxide as chemilumigenic reagents. The method provides N-nitrosamines detection at picomole per liter levels. 

Metals They can be used to mimic corresponding metal electrodes they can be employed as metallic micro- or nanoparticles or as thin films in the form of metallized carbon [127-129]. The main goal is to exploit some specific characteristics of the element, for example, the catalytic activity of platinum for the determination of hydrogen peroxide [127]. 

Rivera-Utrilla and coworkers carried out adsorption studies of Co(ll) ions from aqueous solutions using activated carbons prepared from almond shell activated to different degrees by activation in CO2 at 1123 K, and after the formation of carbon-oxygen acidic surface groups on treatment with nitric acid, hydrogen peroxide, and in air, and carbon-nitrogen basic surface groups on treatment with ammonia. The surface acidity and the surface basicity of each carbon was determined by titration with sodium hydroxide and HCl solutions, respectively. The adsorption isotherms of Co(II) ions on three typical samples of carbons, namely commercial... 

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