Trends in using resilient polyurethane foams as sorbents in analytical chemistry

Synthesis of a New Sorbent Based on Grafted PUF for the Application in the Solid Phase Extraction of Cadmium and Lead

“…This material was used for the extraction of aqueous species for the first time in the early 1970s (Braun and Farag, 1978). Since then, PUF has been used in several procedures for separation and preconcentration, and its use has been the subject of several books and reviews (Braun, 1983;Navratil et al, 1985;. PUF is low in cost, easy to purchase, and provides high enrichment factors.…”

“…PUF is low in cost, easy to purchase, and provides high enrichment factors. However, this sorbent may swell when treated with solvents (Braun, 1983;Navratil et al, 1985). The polyurethane-based polymers are widely used for solid phase extraction, with or without treatment, due to their very low cost and simplicity of preparation (Moawed & El-Shahat, 2006;Saeed & Ahmed, 2005).…”

Retention and Separation Behavior of Some Organophosphorus and Pyrethroid Insecticides on Polyurethane Foams

“…[10][11][12][13][14][15][16][17][18][19][20][21][22] In this paper, the extraction of some insecticides by polyether based polyurethane foam from large volume water samples is reported.…”

“…3 The most common reported extraction procedures for the removal or reduction of these pollutants are limited and are too expensive for routine analysis where many large volume samples are concentrated on site prior to quantitative analysis.4-9 The classical paper of Bowen1° and the pioneering studies of Braun and Farag11,12 on the application of polyurethane foam (PuF) sorbents to trace elements led to revealing the potentialities of their geometrical form: spherical membrane-shaped geometry in extraction chromatography. [10][11][12][13][14][15][16][17][18][19][20][21][22] In this paper, the extraction of some insecticides by polyether based polyurethane foam from large volume water samples is reported.…”

Determination of Cd, Co, Cr, Cu, Fe, Mn, Ni and Pb in natural waters, alkali and alkaline earth salts by electrothermal atomic absorption spectrometry after preconcentration by column solid phase extraction

“…Two major types of column packing materials for column solid phase extraction procedures have been reported in the literature. One type is ion exchange materials [2][3][4][5][6] and the other is complexing agents bounded to solid support materials such as silica [7][8][9], cellulose [10], polyurethane foams [11,12] and porous glass [13,14]. Complexing reagent immobilisation is obtained by physical or chemical retention of chelating substances on the surface of the solid support.…”