kMA	pseudo-first order rate constant of MA photodegradation.
kX+Y	second-order reaction rate constant between the species X and the compound Y.
RMA	initial photodegradation rate of MA.
εY,λ	molar absorption coefficient of the compound Y at the wavelength λ.
p°(λ)	incident spectral photon flux density of the used lamp at the wavelength λ.
$R_X^{Y+h\nu }$	formation rate of the species X in the presence of the compound Y under irradiation.
${\wp }_{Y,\lambda }^S$	fraction of radiation absorbed by the compound Y at the wavelength λ, inside the solution S.