Efficient and straightforward spectrophotometric analysis of 5-hydroxymethylfurfural (HMF) using citrate@FeO nanoparticles as an adsorbent.

In this study, we developed a spectrophotometry method for the analysis of 5-hydroxymethylfurfuraldehyde (HMF) in pharmaceutical formulations using citrate@FeO adsorbent. As bare magnetite (FeO) has certain limitations, such as aggregation and oxidation, surface modifications are commonly used to improve its properties. We successfully coated FeO with sodium citrate to create a magnetic adsorbent for isolating HMF from samples.

An efficient swarm intelligence approach to feature selection based on invasive weed optimization: Application to multivariate calibration and classification using spectroscopic data.

Variable selection plays a key role in classification and multivariate calibration. Variable selection methods are aimed at choosing a set of variables, from a large pool of available predictors, relevant to the analyte concentrations estimation, or to achieve better classification results. Many variable selection techniques have now been introduced among which, those which are based on the methodologies of swarm intelligence optimization have been more respected during a few last decades since they are mainly inspired by nature.

Salting-out homogeneous liquid-liquid extraction in narrow-bore tube: extraction and preconcentration of phthalate esters from water.

In this study a simple and rapid sample preparation technique, homogeneous liquid-liquid extraction based on phase separation in the presence of a salt performed in a narrow-bore tube, followed by GC-flame ionization detection has been developed. In this work, sodium chloride and ACN were used as the salting-out agent and water-soluble extraction solvent, respectively. The homogeneous solution of water and ACN was broken by addition of the salt.