Solid-phase extraction of chromium(iii) with an ion-imprinted functionalized attapulgite sorbent prepared by a surface imprinting technique

2017 ◽  
Vol 9 (21) ◽  
pp. 3221-3229 ◽  
Author(s):  
Zhenhua Li ◽  
Wei Kou ◽  
Shang Wu ◽  
Lan Wu

A new chromium(iii)-imprinted azodicarbonamide-functionalized attapulgite sorbent was synthesized by a surface imprinting technique and was employed as a selective solid-phase extraction material for speciation analysis of chromium(iii) in environmental water samples prior to its determination by inductively coupled plasma atomic emission spectrometry (ICP-AES).

2015 ◽  
Vol 7 (4) ◽  
pp. 1517-1526 ◽  
Author(s):  
Barbara Leśniewska ◽  
Laura Trzonkowska ◽  
Elżbieta Zambrzycka ◽  
Beata Godlewska-Żyłkiewicz

A multi-commutation flow analysis system using on-line solid phase extraction and flame atomic absorption spectrometric detection (MCFA-FAAS) was developed for the study of chromium speciation in sewage samples.


2016 ◽  
Vol 104 (11) ◽  
Author(s):  
Seyed Reza Yousefi ◽  
Ehsan Zolfonoun

AbstractIn this work, after on-line and in-situ solid phase extraction technique was used for the extraction and preconcentration of uranium and thorium from aqueous samples prior to inductively coupled plasma optical emission spectrometry (ICP-OES) determination. In this method, sodium hexafluorophosphate (as an ion-pairing agent) was added to the sample solution containing the cationic surfactant (dodecyltrimethylammonium bromide) and the complexing agent (dibenzoylmethane). A cloudy solution was formed as a result of formation of an ion pair between surfactant and hexafluorophosphate. The solid microparticles were passed through a microcolumn filter and the adsorbed microparticles were subsequently eluted with acid, which was directly introduced into the ICP-OES nebulizer. The main variables affecting the pre-concentration and determination steps of uranium and thorium were studied and optimized. Under the optimum conditions, the enhancement factors of 97 and 95 and the detection limits of 0.52 and 0.21 μg L


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