Interferents, elimination

Interference eliminated by complexatlon and fluorescence developed In buffered solution with 3,4,7-trihydroxyf1avanone. 

Ascorbate oxidase is added to the sensor for ascorbic acid interference elimination. 

Electrochemical NO sensors based on platinized or electrocatalyst-modified electrodes often in combination with a permselective and charged membrane for interference elimination were proposed. Although the catalytic mechanism is still unknown, it can be assumed that NO is co or dinative ly bound to the metal center of porphyrin or phthalocyanine moieties immobilized at the electrode surface. The coordinative binding obviously stabilizes the transition state for NO oxidation under formation of NO+. Typically, sub-pM concentrations of NO can be quantified using NO sensors enabling the detection of NO release from individual cells. 

The propagation of a beam like B is restricted only to a discrete number of angles greater than or equal to, because, for other than such angles, interference eliminates the intensity. If we designate these angles as M, it can be shown that 4rn,... 

Figure 21.2 Solid phase extraction. The separation of an analyte from the matrix. In this example the analyte is the only compound retained on the cartridge. Note the following steps (a), (b) activation and rinsing of the sorbent prior to use (c) introduction of a known volume of the sample (d) interference elimination by rinsing (e) desorption of the analyte by percolation. On the right, chromatogram (GC) obtained following treatment by this sequence of 1 mL of coffee. Below, on the left, SPE cartridges with reservoirs of 1 to 3 mL on the right, automated sample preparation (Aspec model XL4 reproduced courtesy of Gilson).

Hayashi K, IwasaM Y, Kurita R, Sunagawa K, Niwa O, Tate A (2005) The highly sensitive detection of catecholamines using a microiluidic device integrated with an enzyme-modified pre-reactor for interferent elimination and an intradigitated array electrode. J Electroanal Chem 579(2) 215—222... 

Kitsukawa S, Nakagawa H, Fukuda K, Asakura S, Takahashi S, Shigemori T (2000) The interference elimination for gas sensor by catalyst filters. Sens Actuators B 65(1) 120-121 Knaebel KS (2004) Adsorbent selection. Adsorption Research Inc. http //www.adsorption.com/publications/... 

Maciejewska, M., Schafer, D., Schuhmann, W. SECM visualization of spatial variability of enzyme-polymer spots. Part 2 Complex interference elimination by means of selection of highest sensitivity sensor substructures and artificial neural networks. Electmanalysis 2006, 18, 1916-1928. 

Sorbent Pre-conditioning Conditioning Interferences elimination Elution of PAHs Reference... 

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