Solid phase extraction (SPE) using Sep-Pak® cartridges is one of the techniques used for fractionation of antioxidant compounds in waste of dabai oil extraction (defatted dabai parts). The aim of this study was to determine the phenolic compounds and antioxidant capacity in crude extracts and several SPE fractions from methanolic extract of defatted dabai pulp and peel. Based on SPE, Sep-Pak® c...

Spectrometric techniques for the analysis of trace lead have developed rapidly due to the increasing need for accurate measurements at extremely low levels of this element in diverse matrices. This review covers separation and preconcentration procedures, and considers the features of the application with several spectrometric techniques. The use of an appropriate sample handling technique is a...

A simple, highly sensitive, accurate and selective method for determination of trace amounts of Ni2+ in water samples. In this paper, Dioctylphthalate (DOP) was used to encapsulate nano-Fe3O4 and produce a nano-Fe3O4-DOP sorbent based new sorbent was prepared. This was treated with ethylenediamine (ED) in another solvent-free procedure for the formation of a novel nano-Fe3O4-DOP-ED. Flame atomi...

Spectrometric techniques for the analysis of trace lead have developed rapidly due to the increasing need for accurate measurements at extremely low levels of this element in diverse matrices. This review covers separation and preconcentration procedures, and considers the features of the application with several spectrometric techniques. The use of an appropriate sample handling technique is a...

The work presented here aims at developing a microfluidic device for automated sample enrichment of water samples. The device is optimized for the analysis of small organic pollutants by biosensing and environmental monitoring applications. Miniaturization and automation of solid phase extraction with our device enabled us to reduce the volume of sample and of eluent significantly, resulting in...

Determination of Citrinin Using Molecularly Imprinted Solid Phase Extraction Purification, HPLC Separation, and Fluorescence Detection Michael Appell, Michael A. Jackson, Lijuan C. Wang & Wayne B. Bosma To cite this article: Michael Appell, Michael A. Jackson, Lijuan C. Wang & Wayne B. Bosma (2015) Determination of Citrinin Using Molecularly Imprinted Solid Phase Extraction Purification, HPLC S...

In this research, the magnetite polystyrene maleic anhydride (MPSMA) was synthesized and structure and morphology characterized by X-ray diffraction, Fourier transform infrared spectroscopy, scanning electron microscopy techniques. The obtained nano-structured inorganic material was employed as a novel magnetic nanosorbent for separation and pre-concentration of Methyl violet (10B) dye from aqu...

Ghezeljeh montmorillonite nanoclay was used as a natural adsorbent to measure and remove copper ions released from the cooking pot into food by applying the solid phase extraction (SPE) method in batch mode. The clay is characterized by using fourier transform infrared spectroscopy (FT-IR), scanning electron microscopy (SEM) and X-ray diffractometry (XRD). The results of XRD and FT-IR of n...

a new sensitive and selective spectrophotometric method for the determination of iron using a pvc membrane containing bathophenanthroline and dioctylphethalate as the solid phase extraction medium is investigated. fe(ii) in an aqueous sample solution is trapped on the membrane with an anion species, picrate ion and forms a complex with bathophenanthroline. the absorbance of the red-orange membr...