Photoacoustic spectroscopy as a tool for determination of food dyes: Comparison with first derivative spectrophotometry

Basic Principles and Analytical Application of Derivative Spectrophotometry

“…A combination of firstderivative with PCR and PLS models were applied for determination of both herbicides in biological samples [42]. A first-derivative spectrophotometry was used as a reference method for simultaneous determination Brillant Blue, Sunset Yellow and Tartrazine in food [43].…”

Adsorption of Thymol Blue and Erythrosine-B on MWCNTs Functionalized by N-(3-nitrobenzylidene)- N'-trimethoxysilylpropyl-ethane-1,2-diamine Equilibrium, Kinetics and Thermodynamic Study

“…The suitable figures 15 of merit in multi components dye system removing are based on development 15 of novel 16 methods which permits 15 its accurate simultaneous 15,16 determination of mixture. The encounters difficulty is serious peak overlapping 16 that subsequently 17 impossible for its direct determination in the mixtures using general equations like Beer-Lamberts. Derivatives spectroscopies efficiently are applicable 17 for resolving absorption peak overlaps through its separations and corrections of background interference 16 .…”

“…The encounters difficulty is serious peak overlapping 16 that subsequently 17 impossible for its direct determination in the mixtures using general equations like Beer-Lamberts. Derivatives spectroscopies efficiently are applicable 17 for resolving absorption peak overlaps through its separations and corrections of background interference 16 . These methods are based on searching 18 the wavelength which able to accurate 18 and repeatable 17 monitoring for each specie in the complexes without no interferences from the other targets compounds 16,17 .The classical optimization of protocols failed for giving useful information of interactions between several variables 17 .Central composites design or CCD 18 under surface methodologies can be applied 18 for handling of both variable involving and response without suffers above-mentioned 19 draw backs.…”

“…Derivatives spectroscopies efficiently are applicable 17 for resolving absorption peak overlaps through its separations and corrections of background interference 16 . These methods are based on searching 18 the wavelength which able to accurate 18 and repeatable 17 monitoring for each specie in the complexes without no interferences from the other targets compounds 16,17 .The classical optimization of protocols failed for giving useful information of interactions between several variables 17 .Central composites design or CCD 18 under surface methodologies can be applied 18 for handling of both variable involving and response without suffers above-mentioned 19 draw backs. These approaches enable us for making a suitable predicative models for applying several factor even in the presence 19 of complexes interaction for describing and finding the best optimized condition with less times elapsed 18,19 .…”

Open photoacoustic cell for thermal diffusivity measurements of a fast hardening cement used in dental restoring

“…4,5 In particular, photoacoustic (PA) spectroscopy is an important technique because it allows studies in nonhomogeneous materials; it is nondestructive and demands minimal sample preparation. [6][7][8][9][10] Since the PA signal responds only to the absorbed light, the effects of scattered light play no significant roles in the measurements. Apart from several different apparatuses for the PA detection, the simplicity and the usefulness of the open-photoacoustic-cell (OPC) make this technique easily applicable to thermal characterization of solid materials such as the measurement of thermal diffusivity and thermal conductivity.…”