Glossary

T.O.C.

Total Organic Carbon, the measure of organic carbon present in a solution by its conversion to CO2

Photocatalytic system

A system with catalyst, reactor, light source, reaction parameters, activation method to obtain a very slow reaction in an usable time

CO2 electrode

A potentiometric electrode to measure the CO2 concentration in water. The tipycal ranges is from 1e-5 to 1e-2 mol/L

Polilight

From Rofin (Australia); a ligth system, with up to 2 meter of optical fiber, able to produce a "solar-spectra" or by aid of internal filters, a lot of reduced spectre

PCA, scores, catalyses

Principal Component Analysis, a chemometric method based on eigenvalues able to obtain a rappresentation of "objects" in a reduce number of variables, the PC. The scores are the "objects-projection" in the PC space

PCA, loading molecules

See also the previous description. The loadings are the "variables-projection" in the PC space

Catalytic system

A system with catalyst, reactor, use parameters, procedures to encrease the velocity of a chemical reaction

TiO2, nanoparticles

Titanium dioxide in a very fine powder, the typical diameter of particles is a few nanometer (1e-9 meter)

Reactor, measurement cell

In our case is a glass cell with inlet, outlet, quartz window, hole to insert the CO2 electrode, two gooch filter to maintain the catalyst inside. With UV light in this cell obtain photodegradation of organic molecules in water solution

UV radiation

Ultraviolet radiation, a spectre of light radiaton after visible. The wavelength start at 100 nm up to 400 nm near violet light

Photodegradation

A degradation of organic molecules with light.

Photolysis

A cracking of organic molecules

Suspended catalyst

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Immobilised catalyst

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Kinetics

Variation study of one parameter (response, analytic concentration, egg.) versus flow time

Representative molecules

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Chemometrics

An Analytical Chemistry method using "statistic instruments" to perform separations or individuation. We are performing chemometric calculations using analytes as variables and catalyses as objects.