PMID- 18371918
OWN - NLM
STAT- MEDLINE
DCOM- 20080808
LR  - 20131121
IS  - 1873-3573 (Electronic)
IS  - 0039-9140 (Linking)
VI  - 75
IP  - 2
DP  - 2008 Apr 15
TI  - Chromium(III)-imprinted silica gel for speciation analysis of chromium in 
      environmental water samples with ICP-MS detection.
PG  - 536-43
LID - 10.1016/j.talanta.2007.11.059 [doi]
AB  - A new chromium(III)-imprinted 3-(2-aminoethylamino) propyltrimethoxysilane 
      (AAPTS)-functionalized silica gel sorbent was synthesized by a surface imprinting 
      technique and was employed as a selective solid-phase extraction material for 
      speciation analysis of chromium in environmental water samples prior to its 
      determination by inductively coupled plasma mass spectrometry (ICP-MS). The 
      prepared Cr(III)-imprinted silica gel shows the selectivity coefficient of more 
      than 700 for Cr(III) in the presence of Mn(II). The static adsorption capacity of 
      the ion-imprinted and non-imprinted sorbent for Cr(III) were 30.5 mg g(-1) and 
      13.4 mg g(-1). It was also found that Cr(VI) could be adsorbed at low pH by the 
      prepared imprinted silica gel, and this finding makes it feasible to enrich and 
      determine Cr(VI) at low pH without adding reducing reagents. The imprinted silica 
      gel sorbent offered a fast kinetics for the adsorption and desorption of both 
      chromium species. Under the optimized conditions, the detection limits of 4.43 pg 
      mL(-1) and 8.30 pg mL(-1) with the relative standard deviations (R.S.D.s) of 
      4.44% and 4.41% (C=0.5 ng mL(-1), n=7) for Cr(III) and Cr(VI) were obtained, 
      respectively. The proposed method was successfully applied to the speciation of 
      trace chromium in environmental water samples. To validate the proposed method, 
      two certified reference materials were analyzed and the determined values were in 
      a good agreement with the certified values. The developed method is rapid, 
      selective, sensitive and applicable for the speciation of trace chromium in 
      environmental water samples.
FAU - Zhang, Nan
AU  - Zhang N
AD  - Department of Chemistry, Wuhan University, Wuhan, Hubei Province 430072, PR 
      China.
FAU - Suleiman, Jibrin Sabo
AU  - Suleiman JS
FAU - He, Man
AU  - He M
FAU - Hu, Bin
AU  - Hu B
LA  - eng
PT  - Journal Article
PT  - Research Support, Non-U.S. Gov't
DEP - 20071204
PL  - Netherlands
TA  - Talanta
JT  - Talanta
JID - 2984816R
RN  - 0 (Water Pollutants, Chemical)
RN  - 0R0008Q3JB (Chromium)
RN  - 60650-90-0 (Silica Gel)
RN  - 7631-86-9 (Silicon Dioxide)
SB  - IM
MH  - Chromium/*analysis/*chemistry
MH  - Hydrogen-Ion Concentration
MH  - Mass Spectrometry/*methods
MH  - Reference Standards
MH  - Reproducibility of Results
MH  - Sensitivity and Specificity
MH  - Silica Gel
MH  - Silicon Dioxide/*chemistry
MH  - Water Pollutants, Chemical/*analysis
EDAT- 2008/03/29 09:00
MHDA- 2008/08/09 09:00
CRDT- 2008/03/29 09:00
PHST- 2007/08/08 00:00 [received]
PHST- 2007/11/13 00:00 [revised]
PHST- 2007/11/16 00:00 [accepted]
PHST- 2008/03/29 09:00 [pubmed]
PHST- 2008/08/09 09:00 [medline]
PHST- 2008/03/29 09:00 [entrez]
AID - S0039-9140(07)00811-9 [pii]
AID - 10.1016/j.talanta.2007.11.059 [doi]
PST - ppublish
SO  - Talanta. 2008 Apr 15;75(2):536-43. doi: 10.1016/j.talanta.2007.11.059. Epub 2007 
      Dec 4.