Oxygen probe

FIGURE 6-18 Membrane-covered oxygen probe based on the Clark electrode. (Reproduced with permission from reference 60.)... 

Subczynski, W. K., A. Wisniewska, J. S. Hyde, and A. Kusumi. 2007b. Tree-dimensional dynamic structure of the liquid-ordered domain in lipid membranes as examined by pulse-EPR oxygen probing. Biophys. J. 92 1573-1584. 

Kroneis / Marsoner 1983 sterilizable fiber optic oxygen probe for bioreactors (1 cm i.d.)... 

Wolfbeis 1984 glass-immobilized oxygen probes (breath gas sensor)... 

Okazaki 1988 frequency doubled diode laser (390 nm) used to excite the oxygen probe benzoperylene... 

Kroneis H.W., Marsoner H.J., A fluorescence-based sterilizable oxygen probe for use in bioreactors, Sensor Actuat B-Chem 1983 4 587. 

Freeman T.F., Seitz W.R., Oxygen probe based on tetrakis(alkylamino)ethylene chemiluminescence. Anal. Chem. 1981 53 98. 

S. Akgol and E. Dinckaya, A novel biosensor for specific determination of hydrogen peroxide catalase enzyme electrode based on dissolved oxygen probe. Talanta 48, 363-367 (1999). 

Fig. 6. Kainate-iGluR2-SlS2 complex, including isoenergy contours according to GRID (16) - methyl probe (beige, -3.0 kcal/mol), water probe (cyan, -10.0 kcal/mol), and anionic oxygen probe (magenta, -11.0 kcal/mol).

Even if few systems are proposed for inorganic compounds (with regard to the number of potential pollutants), instruments or sensors for parameters used for treatment process control are available UV systems for residual chlorine in deodorization, electrochemical sensors for dissolved oxygen (with nowadays a luminescent dissolved-oxygen probe utilizing a sensor coated with a luminescent material) and a colorimetric technique for residual ozone. 

Implementation Confirmation of the in situ monitors results is obtained when river water samples are brought to the lab and tested for dissolved oxygen using a lab dissolved oxygen probe (a polarographic electrode-based measurement) and the classic Winkler oxygen titration method. 

The variable oxygen probe was applied to a large set of structures Y-C-C-OX (Y = F and SiR3, with Y = H for comparison) (Amos et al., 1992). It was found that /3-fluorine has a small bond-shortening effect on the C-OX bond, and that this effect is greater for longer bonds (to better... 

SN1 reactions of benzylic systems. Perhaps the most interesting system to be examined using the variable oxygen probe is a series of derivatives [108] of 1-phenylethanol (Edwards et al., 1986b). By varying substituents in the aromatic ring of the R group of R-OX it was possible to monitor... 

Use an oxygen probe to detect an air leak in the vacuum system, with Oi sensor limit set to 10-15 ppm. 

Supernatant BOD5 was measured by the standard method of the American Public Health Association (24), but using the EIL dissolved oxygen probe model no. 8012 to measure oxygen concentration (Electronic Instruments Ltd., Richmond, Surrey, UK.)... 

Tan TC, Li F, Neoh KG, Lee YK (1992) Microbial membrane-modified dissolved oxygen probe for rapid biochemical oxygen demand measiu ement. Sensors and Actuators B 8 167-172... 

Equation (2.8) is, of course, the Nemst equation. From the e.m.f. of the cell, an unknown oxygen partial pressure can be determined. This has led to the use of solid electrolyte electrochemical cells as oxygen probes.4,14... 

A galvanic dissolved oxygen probe measures the partial pressure of oxygen by use of an electrode based on the following reactions. 

The lambda sensor, which is found in cars with catalytic converters, is an example of an oxygen probe based on the principle of selective electrodes. This sensor, which looks like a spark plug, has a zirconium sleeve (Zr02) that behaves as a solid electrolyte. The external wall is in contact with emitted gas while the internal wall (the reference) is in contact with air. Two electrodes measure the potential difference between the two walls, which is indicative of the difference in concentration of oxygen. 

The initial data with the fastest change in cL may not be correct because of possible probe lag effects. The degree of deviation depends on the response time of the probe and the magnitude of kLa (Philichi and Stenstrom, 1989). For commonly used laboratory oxygen probes (time constants < 10 s), truncation of the data below 20 % of cL is recommended (ASCE Standard, 1991). This problem can be taken into consideration in both linear and non-linear regression by choosing the appropriate start values for clo ta. 

Oxygen probe Immediate response to changes in cL Oxygen probe lag x Various models have been proposed to describe the oxygen probe lag (Dang et al., 1977 Linek et al., 1987) and can be used for ozone probes... 

Philichi T L, Stenstrom M K (1989) The effects of dissolved oxygen probe lag on oxygen transfer parameter estimation. Journal Water Pollution Control Federation 61 83-86. 

The response time is between 15 and 20 s for both gases, and the precision is better than that obtained with the Clark electrode. A sterilizable oxygen probe based on this principle with performance characteristics equal to or better than the amperometric oxygen electrode has been constructed (Kroneis andMarsoner, 1983). 

Capannesi et al. [78] Polyphenols Olive oil Tyrosinase/with glutaraldehyde onto a preactivated membrane (Immobilon) sandwiched between the gas permeable membrane of the electrode and a dialysis membrane Amperometric oxygen probe... 

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