Journal Highlight: Utilizing a nano-sorbent for the selective solid-phase extraction of vanillic acid prior to its determination by photoluminescence spectroscopy

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  • Published: Jan 19, 2015
  • Author: separationsNOW
  • Channels: Sample Preparation
thumbnail image: Journal Highlight: Utilizing a nano-sorbent for the selective solid-phase extraction of vanillic acid prior to its determination by photoluminescence spectroscopy
A photoluminescence spectroscopic method was developed for the quantification of vanillic acid in plants after selective extraction using an SPE column packed with nickel–aluminum layered double hydroxide as a nano-sorbent.

Utilizing a nano-sorbent for the selective solid-phase extraction of vanillic acid prior to its determination by photoluminescence spectroscopy

Luminescence, 2014, 29, 1162-1168
Hossein Abdolmohammad-Zadeh, Fatemeh Mahmoudi-kordi and Manoochehr Rahmati

Abstract: Vanillic acid (VA) is a phenolic acid, and acts as a natural antioxidant in fruits, vegetables and plants. The extraction and determination of trace levels of VA in plants is important, because stimulation of protein synthesis and activation of antioxidant enzymes occur in the presence of phenolic acids at trace levels. In this research, a photoluminescence spectroscopic method was developed for the quantification of VA in plant samples after separation and pre-concentration. Selective extraction of VA from aqueous solution was performed using a solid-phase extraction column packed with nickel–aluminum layered double hydroxide as a nano-sorbent. After elution of extracted analyte from the column using 3 mL of a 3 mol/L NaOH solution, its concentration was determined spectrofluorometrically at λem = 357 nm with excitation at λex = 280 nm. The spectrofluorometry method gave a linear response for VA within the range 20.0–900.0 µg/L, with a correlation coefficient of 0.9982. The limit of detection and sorption capacity were 7.6 µg/L and 66.2 mg/g, respectively. The method was validated by comparing the obtained results with gas chromatographic data. This method was used to determine VA in Chenopodium album and Prangos asperula plants.

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