Silica Modified with Polyaniline as a Potential Sorbent for Matrix Solid Phase Dispersion (MSPD) and Dispersive Solid Phase Extraction (d-SPE) of Plant Samples

Abstract

Polyaniline (PANI) is one of the best known conductive polymers with multiple applications. Recently, it was also used in separation techniques, mostly as a component of composites for solid-phase microextraction (SPME). In the present paper, sorbent obtained by in situ polymerization of aniline directly on silica gel particles (Si-PANI) was used for dispersive solid phase extraction (d-SPE) and matrix solid–phase extraction (MSPD). The efficiency of both techniques was evaluated with the use of high performance liquid chromatography with diode array detection (HPLC-DAD) quantitative analysis. The quality of the sorbent was verified by Raman spectroscopy and microscopy combined with automated procedure using computer image analysis. For extraction experiments, triterpenes were chosen as model compounds. The optimal conditions were as follows: protonated Si-PANI impregnated with water, 160/1 sorbent/analyte ratio, 3 min of extraction time, 4 min of desorption time and methanolic solution of ammonia for elution of analytes. The proposed procedure was successfully used for pretreatment of plant samples.

New Vortex-Synchronized Matrix Solid-Phase Dispersion Method for Simultaneous Determination of Four Anthraquinones in Cassiae Semen

“…The sample/adsorbent ratio is a significant factor affecting extraction efficiency since the contact surface/active sites on the adsorbent surface should be sufficient to trap the target compounds [43]. The mixture of CSP and sample was ground for 3 min and eluted with 250 mM [Domim]NO 3 aqueous solution by 3 min-vortex.…”

Enhanced Adsorptive Properties and Pseudocapacitance of Flexible Polyaniline-Activated Carbon Cloth Composites Synthesized Electrochemically in a Filter-Press Cell

“…These virtues have made PAni an attractive material for a broad spectrum of technologically important applications, such as Li-ion batteries, supercapacitors, electromagnetic interference shielding, electrochemical sensors, and anti-corrosion coatings [1,6]. Also, it is worth mentioning the advent of recent new applications in solid-phase micro-extraction [7] or as (electro)adsorbent/ion-exchange materials for environmental issues [8,9,10], where the affinity of target pollutants for PAni active groups (charged and neutral amine and imine groups) is exploited to an advantage.…”

A rapid and efficient extraction method based on industrial MCM‐41‐miniaturized matrix solid‐phase dispersion extraction with response surface methodology for simultaneous quantification of six flavonoids in Pollen typhae by ultra‐high‐performance liquid chromatography

“…The solid support material is one of the key factors and the common adsorbents including mussel shell, C18, florisil PR, molecularly imprinted polymers and graphitic fibers . Compared with conventional matrix solid‐phase dispersion extraction, the miniaturized matrix solid‐phase dispersion extraction (MMSPD) has the advantages of easy operation, low consumption of sample and reagent, high‐efficiency, time‐saving, and environment‐friendly . Therefore, it is necessary to use the new adsorbent to enlarge the application of MMSPD for quality evaluation of herbal medicines.…”