Advantages and limitations of thermal lens spectrometry over conventional spectrophotometry for absorbance measurements

摘要: This review considers the advantages and limitations that thermal lens spectrometry has over conventional spectrophotometry for measurement of optical absorption in specific applications. The photothermal method is characterized by its intrinsic sensitivity resulting from indirect nature amplified physical thermo-optical parameters which are not effective absorbance measurements. Other include a weak dependence on light scattering complementary spectra with respect to emission speciation studies at very low concentrations. main drawbacks convective noise, background complexity experimental set-up, especially when differential or wavelength scanning measurements required.