2016
DOI: 10.1039/c6an01560c
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Smart sensory materials for divalent cations: a dithizone immobilized membrane for optical analysis

Abstract: An optode for Cu(ii), Cd(ii), Zn(ii) and Hg(ii) sensing has been designed by immobilization of dithizone on a triacetylcellulose membrane (mem-DTZ). The sorption of the metal ions on the mem-DTZ has been thoroughly characterized, in particular sorption kinetics, sorption isotherms and profiles as a function of the pH have been studied. Methods to assess the concentrations of the cations, both individually and in a mixture, in unknown samples, have been developed. In particular, UV-vis spectra and digital infor… Show more

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Cited by 15 publications
(8 citation statements)
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“…The conditions, while the proposed sensor exhibited the imprinting of DTZ-Zn (II) complexes before and after the removal of Zn (II) to provide good selectivity for binding more preferentially to Zn (II) ions than other metal ions. [59][60][61][62][63][64] Zn (II) ions were detected with a LOD and linearity range similar to the results reported from digital image-based colorimetry in the former study. 60,64 Although the lower LOD and wider linear range were obtained from the analytical instruments, the proposed sensor offered good features in terms of portable, reliability and sensitivity, as well as good accuracy and precision for on-site qualitative and quantitative analysis.…”
Section: Samplessupporting
confidence: 76%
“…The conditions, while the proposed sensor exhibited the imprinting of DTZ-Zn (II) complexes before and after the removal of Zn (II) to provide good selectivity for binding more preferentially to Zn (II) ions than other metal ions. [59][60][61][62][63][64] Zn (II) ions were detected with a LOD and linearity range similar to the results reported from digital image-based colorimetry in the former study. 60,64 Although the lower LOD and wider linear range were obtained from the analytical instruments, the proposed sensor offered good features in terms of portable, reliability and sensitivity, as well as good accuracy and precision for on-site qualitative and quantitative analysis.…”
Section: Samplessupporting
confidence: 76%
“…Unlike PCA, PLS finds directions of the latent variables, explaining the maximum variance and maximizing the correlation with the re- Partial Least Square regression (PLS) was used for the chemometric data treatment. The PLS bases have been widely described [54][55][56][67][68][69][70], so they are only brief details here. PLS is a multivariate calibration algorithm aimed to extract most of the information contained in the UV-vis spectra (X variables), which is correlated to the Pd(II) concentration (Y variable) through the so-called latent variables (LVs).…”
Section: Methodsmentioning
confidence: 99%
“…In summary, PCA has been recognized as an effective tool for data treatment of the results obtained by colorimetric sensor devices, as evidenced by the numerous papers on this subject [46][47][48][49][50][51][52][53].…”
Section: Pcamentioning
confidence: 99%
“…In different works of Alberti and Biesuz [47,[60][61][62], the PLS method is successfully applied to quantify different analytes simultaneously; in these studies, low-cost, disposable colorimetric sensors are used.…”
Section: Plsmentioning
confidence: 99%
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