A novel dispersive micro-solid phase extraction method combined with gas chromatography for analysis of organochlorine pesticides in aqueous samples

Abstract

1D-PANIs have good dispersibility and permeability. A plastic dropper acted as both the extraction and preconcentration device. The proposed method is simple, inexpensive and highly efficient.

Speciation and determination of inorganic arsenic species in water and biological samples by ultrasound assisted-dispersive-micro-solid phase extraction on carboxylated nanoporous graphene coupled with flow injection-hydride generation atomic absorption spectrometry

“…[19][20][21] Although SPE is being applied broadly, it suffers from certain shortcomings such as solvent loss, large secondary wastes, a long procedure, and a need for complex equipment. 22 Recently, dispersive-micro-solid phase extraction (D-m-SPE), a rapid and simple clean-up technique, has been developed to reduce the time required for SPE operation, in which the extraction is carried out in the bulk solution. 23 This approach enables the sorbent to interact rapidly and uniformly with the all the target analytes and therefore shortens the time of sample preparation in comparison with a classical SPE.…”

“…Sample clean-up and the extraction step are carried out simultaneously and so, it is suitable for the extraction in complex matrices. 22,[24][25][26][27] This technique can be further assisted by auxiliary energies such as ultrasonic (US) radiation in order to favor the kinetic of the masstransfer process of the target analytes to the solid phase. This leads to an increment in the extraction efficiency of the technique in a minimum amount of time.…”

Dissolvable layered double hydroxide nanoadsorbent‐based dispersive solid‐phase extraction for highly efficient and eco‐friendly simultaneous microextraction of two toxic metal cations and two anionic azo dyes in real samples

“…Therefore, there is a need to develop green sample preparation methods that use less toxic reagents or do not use organic solvents. Dispersive solid‐phase extraction (D‐SPE), as a new type of SPE method, is a notably efficient and miniaturized extraction technique that has some advantages over the traditional SPE method, such as increased sensitivity and extraction efficiency, short extraction time, reduced solvent consumption, simplified extraction process and avoiding the carryover problem in operation . In this method, the adsorbent is directly added to the sample solution containing the target analytes, and the dispersion process is assisted by an external energy source such as vortex, air or sonication.…”

Determination of triazine pesticides in honey by ultra high performance liquid chromatography-high resolution isotope dilution mass spectrometry combined with dispersive micro-solid phase extraction

“…19 Recent research activities have been focused on the development of efficient, rapid, economical, and miniaturized sample preparation methods, 20 accordingly the dispersive micro-solid phase extraction (DMSPE) has been widely used as a miniature model of SPE based on the use of micro-amounts at the sorbent phase. [21][22][23][24][25][26] The DMSPE exhibits some advantages over DSPE (superior cleanup effects) and SPE in the aspects of short time requirement, less solvent consumption and the absence of complex equipment. In the DMSPE technique, the solid sorbent is added directly to an extract, so the extraction and cleanup procedure relies only on shaking or centrifugation.…”