Oxygen polarograph

Dissolved oxygen polarographic electrode (InPro 6050, Mettler-Toledo, 2006) The cathode, where the half-reaction with 02 (02 + 2H20 + 4e —> 40H ) takes place, is in contact with a membrane, that allows the transport of the dissolved oxygen from the external medium. At the anode, the silver oxidation (Ag + Cl- —> AgCI + e ) takes place. 

Ugwu SO, Apte SP. Systematic screening of antioxidants for maximum protection against oxidation an oxygen polarograph study. Pharm PDA J Sci Technol 1999 53 252- 259. 

In air with a normal composition, the oxygen partial pressure is 0.21 atm, the O2 solubility would become 2.56 x 10 mol dm. The solubility of oxygen in water has been the subject of much literature. Currently the oxygen polarographic probe is usually used to measure solubility of O2 in aqueous solutions. ... 

FIG. 24-14 Dissolved-oxygen electrodes a) polarographic (impress breakdown voltage for oxygen measure current) (h) voltametric (measure electromotive force). 

Fatt, Polarographic Oxygen Sensors, CRC Press, Cleveland, OH, 1976... 

Polarographic analysis - continued Ukovic equation, 596 introduction to, 602 influence of dissolved oxygen, 602, 608 investigation of, 618 mercury, 608 principles of, 592 pulse, 611... 

Explain the reason for including the time-consuming oxygen removal step in pulse-polarographic measurements of tin ion in juice samples. 

Electrochemical analytical techniques are a class of titration methods which in turn can be subdivided into potentiometric titrations using ion-selective electrodes and polarographic methods. Polarographic methods are based on the suppression of the overpotential associated with oxygen or other species in the polarographic cell caused by surfactants or on the effect of surfactants on the capacitance of the electrode. One example of this latter case is the method based on the interference of anionic surfactants with cationic surfactants, or vice versa, on the capacitance of a mercury drop electrode. This interference can be used in the one-phase titration of sulfates without indicator to determine the endpoint... 

Fatt, I. Polarographic Oxygen Sensors, Cleveland, Ohio, CRC Press 1976 Hitchman, M. L. Measurement of Dissolved Oxygen, New York, Wiley 1978 Giquere, P. A., Lauzier, L. Can. J. Res. Sect. B 23, 76 (1945)... 

Kreuzer, F., Kimmich, H. P., Brezina, M. Polarographic Determination of Oxygen in Biological Materials in Medical and Biological Applications of Electrochemical Devices (ed.) Koryta, J. Chapt. 6, New York, Wiley 1980... 

The colorimetric method of Averell and Norris (3) for estimation of parathion is also applicable to the oxygen analog, which gives a magenta color of identical absorption peak (16). The polarographic method of Bowen and Edwards (6) is also applicable to the analysis of this ester. 

The experimental set-up for cellular oxygen measurements (p02) consists of following components p02 measuring micro chamber (volume 0.6 microliter), polarographic microelectrode, water-bath for constant temperature, chemical microsensor connected to a strip-chart recorder and gas calibration unit. 

D.W. Kraus and J.E. Doeller, Sulfide consumption by mussel gill mitochondria is not strictly tied to oxygen reduction measurements using a novel polarographic sulfide sensor. J. Exp. Biol. 207, 3667-3679 (2004). 

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