Application of polyurethane foam as a sorbent for trace metal pre-concentration — A review

Chemical Speciation of Chromium(III) and (VI) Using Phosphonium Cation Impregnated Polyurethane Foams Prior to Their Spectrometric Determination

“…After phase separation, the aliquot solution was separated out and assayed by direct spectrophotometry at 545 nm 26 or by FAAS. At Cr(VI) concentrations lower than the lower limit of detection (LOD) of DPC, 27 AAS was used at the optimum operational conditions.…”

“…[22][23][24] The cellular structures of the PUFs in foamed and micro spherical forms make it a suitable and excellent filling material with good capacity for firmly retaining various extracting agents. 25,26 Based on the resilience characters of the PUFs, El-Shahawi et al 27 have used tetraphenylphosphonium bromide (TPP + ·Br -) treated PUFs in medical syringes in pulse column for speciation of Cr(III) and Cr(VI) species in wastewater. The reagent TPP + ·Br -loaded PUFs sorbent survived the extraction and stripping process, its recycle ability was fine, it is safe as long as Fast and selective sorptions of Cr(VI) species from aqueous media onto tetraphenylphosphonium bromide (TPP + ·Br -) physically immobilized polyurethane foams (PUFs) sorbent were achieved.…”

Cytosine-functionalized polyurethane foam and its use as a sorbent for the determination of gold in geological samples

“…To date, modied PUFs have exhibited higher adsorption capacities and selectivity capacities than untreated PUFs, thus allowing wider application of modied PUFs. 19 Functionalized PUFs have been used as excellent sorbents with good stability, high capacity, and good exibility. 20,21 Also, functionalized PUFs have been shown to facilitate relatively fast separations with good enrichment capacities.…”

Use of Functionalized Resin for Matrix Separation and Trace Elements Determination in Petroleum Produced Formation Water by Inductively Coupled Plasma Mass Spectrometry

“…SPE has specific advantages, including simplicity, reliability, good metal loading capacity, and the ability to obtain high enrichment factors [12,13]. Versatile systems have been obtained by applying solid supports loaded or functionalized with complexing reagents [14][15][16]. These systems have been applied for preconcentration and determination of metals in a wide range of samples [17][18][19].…”