Cristian Grazioli

University of Udine | UNIUD · Department of Chemistry, Physics and the Environment

A low-cost portable analytical device, suitable for performing reflectance measurements on paper supports is proposed. It consists of a simple module consisting of a matrix of six types of photodiodes (six channels) with maximum sensitivity at six different wavelengths in the visible region. The device was used in combination with paper-based analy...

A screen printed electrode modified for gas phase measurements is used for analyzing the ethanol content in alcoholic drinks. It consists in the application of a paper crown, soaked with the room temperature ionic liquid (RTIL) 1‐butyl‐3‐methylimidazolium hydrogen sulfate, upon a screen printed cell contacting the outer edge of the gold disc workin...

Nanomaterials can be used to modify electrodes and improve the conductivity and the performance of electrochemical sensors. Among various nanomaterials, gold-based nanostructures have been used as an anchoring platform for the functionalization of biosensor surfaces. One of the main advantages of using gold for the modification of electrodes is its...

Paper has been widely employed as cheap material for the development of a great number of sensors such as pregnancy tests, strips to measure blood sugar, and COVID-19 rapid tests. The need for new low-cost analytical devices is growing, and consequently the use of these platforms will be extended to different assays, both for the final consumer and...

This investigation was carried out with the aim of verifying whether transmittance detection modes on soaked paper, which is a simple and attractive determination approach for microfluidic paper-based analytical devices, can be improved by using deep eutectic solvents (DESs) as suitable media for minimizing reflection and refraction phenomena affec...

Deep Eutectic Solvents (DESs) are a new class of solvents characterized by a remarkable decrease in melting point compared to those of the starting components. The eutectic mixtures can be simply prepared by mixing a Hydrogen Bond Acceptor (HBA) with a Hydrogen Bond Donor (HBD) at a temperature of about 80 • C. They have found applications in diffe...

Malondialdehyde (MDA) is a mutagenic secondary product of the peroxidation of polyunsaturated fatty acids, often used as a target for the food oxidation state, whose determination is frequently performed by its slow reaction with thiobarbituric acid (TBA), dissolved in acidified aqueous-ethanol medium, to produce a pink colored MDA-TBA adduct. In t...

This investigation was carried out with the aim of stressing that technologically-advanced systems can be prototyped and produced by using 3D printing and inexpensive electronic modules. In particular, open-source technologies are opening new exciting possibilities also in the area of chemical analysis, thus making possible the assembly of customiz...

Pulsed electric field (PEF) is a non-thermal technology able to promote color and polyphenols extraction from grape skins. Most of the publications about PEF in winemaking report data concerning international varieties, poorly considering minor cultivars and the medium/long-term effects of the treatment on wine composition during storage. PEF was a...

A rapid and user‐friendly approach is here presented for assembling smart and versatile platforms for simultaneous electrochemical and spectrophotometric measurements. They consist of an optically transparent pencil‐drawn electrochemical cell, including reference, counter and working carbon electrodes, assembled on flexible PVC supports, exploiting...

A new family of imine-based ligands containing pyridine or furan as aromatic donating ring [N, N’-bis(2-pyridylmethylidene)- 1,2-(R,R+S,S)-cyclohexanediamine, L1; N, N’-bis(2-furanylmethylidene)-1,2-(R,R+S,S)-cyclohexanediamine, L2 and N, N’-bis(2-thienylmethylidene)- 1,2-(R,S)-cyclohexanediamine, L3] has been prepared in high yield by means of an...

A new family of imine and amine-based racemic ligands containing furan or pyridine as aromatic donating ring [N, N’-bis(2-pyridylmethylidene)- 1,2-(R,R+S,S)-cyclohexanediamine, L1; N, N’-bis(2-furanylmethylidene)- 1,2-(R,R+S,S)-cyclohexanediamine, L2; N, N’-bis(2-pyridylmethyl)- 1,2-(R,R+S,S)-cyclohexanediamine, L3 and N,N’-bis(2-furanylmethyl)-1,2...

The thermodynamic parameters for the complexation reaction between Zn2+ and Hg2+ ions with the mixed amino-polypyridinic ligands tris[(2-pyridyl)methyl]amine (TPA) and 6,6-bis–bis (pyridylmethyl)aminomethyl]-2,2-bipyridine (BTPA) have been obtained in anhydrous dimethylsulfoxyde (DMSO) by using spectrophotometry, polarography, potentiometry and tit...