Polymer-based recyclable solid-phase optical sensor to quantify Hg in aqueous samples.

In this work, we engineered a facile and portable solid-state sensor for the selective colorimetric detection of toxic Hg. The sensor architecture was based on a hierarchically organized macro/mesoporous polymeric monolith, which provided a highly ordered porous framework and substantial surface area features that significantly enhanced the immobilization efficiency of the chromoionophoric probe and facilitated the capture of trace-level analytes in the sub-ppb concentration range. The chromoionophore, DPQD, was synthetically tailored and subsequently integrated into a poly(acrylic acid-co-trimethylolpropane triacrylate) [poly(AA-co-TMPTA)] monolithic matrix via a robust physisorptive method.

Amide-decorated reusable C silica-packed columns for the rapid, efficient and sequential separation of lanthanoids using reversed phase-high performance liquid chromatography.

The current work focuses on the sequential separation of trivalent lanthanides (except Pm) using modified C silica-packed supports through the reversed-phase high-performance liquid chromatography (RP-HPLC) technique. In the current research, four indigenously synthesized amphiphilic aromatic triamide derivatives, namely N, N, N, N, N, N-hexa(alkyl) benzene-1,3,5-tri carboxamide (alkyl = butyl, hexyl, octyl, and decyl), were employed as column modifiers. The results show that the separation of Ln can be achieved systematically (< 12 min) by tuning the modifiers' functional group and hydrophobic chain and fine-tuning the column modification procedure and separation parameters.

Fabrication of reusable probe impregnated polymer monolithic sensor for the visual detection of Cd in natural waters and cigarette samples.

This work demonstrates the fabrication of a simple, low-cost naked-eye colorimetric solid-state sensor model for selective sensing of Cd. The sensor was developed using a polymer monolithic architect; namely, poly(n-allylthiourea-co-ethyleneglycol dimethacrylate) (poly(ATU-co-EGD) imbued with the chromophoric probe, 3-(quinoline-8-yldiazenyl)quinoline-2,4-diol (QYQD). The concocted indigenous perforated structural assemblies were studied through various microscopic, spectroscopic, and diffraction techniques.