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.

Hydrogels as Novel and Efficient Materials in Sorbent-Based Sample Preparation Techniques.

Recently, the application of hydrogel materials in sample preparation techniques has increased dramatically. This review discusses application of hydrogels in the field of sample preparation and focuses on extraction techniques practiced with hydrogel materials as sorbent and coating materials, and discusses their synthesis route. After introducing hydrogels, their applications in a variety of solid phase extraction methods (as one of the types of sample preparation techniques) are described.

A turn-on/off fluorescent sensor based on nano-structured Mg-Al layered double hydroxide intercalated with salicylic acid for monitoring of ferric ion in human serum samples.

The present work aimed to provide a novel chemosensor for ferric ion detection in human serum samples using nano-structured Mg-Al layered double hydroxide intercalated with salicylic acid (Mg-Al LDH-SA) as a sensitive fluorescence probe. The Mg-Al LDH-SA nanomaterial was synthesized and characterized via Fourier transform infrared spectroscopy, X-ray diffraction analysis, field emission scanning electron microscopy, dynamic light scattering and energy dispersive spectroscopy. The synthesized nanomaterial was applied to determine ferric ions by measuring the fluorescence intensity of Mg-Al LDH-SA sol solution at λ = 404 nm with excitation at λ = 287 nm.

Dispersive liquid-liquid microextraction based on solidification of floating organic droplet followed by spectrofluorimetry for determination of carvedilol in human plasma.

Background: Simple, chip and rapid analytical methods are required in biomedical analysis laboratories to support therapeutic drug monitoring units in hospitals. The present work aimed to provide such a method for quantitative determination of carvedilol in plasma samples.

Results: A new, simple, precise and efficient method was developed for the determination of carvedilol in human plasma using a dispersive liquid-liquid microextraction based on solidification of floating organic droplet, followed by spectrofluorimetry method.