Separation methods applied to arsenic speciation

Hu, Bin; Chen, Beibei; He, Man; Nan, Kai; Xu, Yan; Xu, Chi

doi:10.1016/bs.coac.2019.04.001

Cited by 5 publications

(1 citation statement)

References 193 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The essential conditions for the application of this approach are: relatively easy and reproducible synthesis of the sorbent from accessible reagents; the sorbent should be characterized with high extraction efficiency and selectivity toward the target species; the whole analytical procedure is simple and easy to manipulate. Recently, arsenic speciation based on non-chromatographic approaches using solid-phase extraction has often been used due to the abovementioned simplicity, low cost, robustness, and flexibility [ 7 , 8 , 9 , 10 , 11 , 12 , 13 ].…”

Section: Introductionmentioning

confidence: 99%

Ionic Liquid Modified Polymer Gel for Arsenic Speciation

Dakova,

Karadjova

2024

Molecules

View full text Add to dashboard Cite

A new ionic liquid modified polymer gel containing methylimidazolium groups (poly(MIA)) is proposed as a sorbent for the separation and enrichment of trace inorganic and organic arsenic species in surface waters. The poly(MIA) was synthesized by chemical modification of polymeric precursor using post-polymerization modification of poly(glycidyl methacrylate-co-trimethylolpropane trimethacrylate). The composition, structure, morphology, and surface properties of the prepared particles were characterized using elemental analysis, Fourier transform infrared spectroscopy, scanning electron microscopy, and nitrogen adsorption–desorption measurements. Optimization experiments showed that at pH 8, monomethylarsonic acid (MMAs), dimethylarsinic acid (DMAs), and As(V) were completely retained on the poly(MIA), while the sorption of As(III) was insignificant. The desorption experiments revealed that due to the weaker binding of organic arsenic species, selective elution with 1 mol/L acetic acid for MMAs + DMAs, followed by elution with 2 mol/L hydrochloric acid for As(V), ensured their quantitative separation. The adsorption kinetic and mechanism were defined. The analytical procedure for As(III), As(V), MMAs, and DMAs determination in surface waters was developed and validated through the analysis of certified reference material.

show abstract