PMID- 17256811
OWN - NLM
STAT- MEDLINE
DCOM- 20070608
LR  - 20131121
IS  - 1076-5174 (Print)
IS  - 1076-5174 (Linking)
VI  - 42
IP  - 4
DP  - 2007 Apr
TI  - A novel capillary microextraction on ordered mesoporous titania coating combined 
      with electrothermal vaporization inductively coupled plasma mass spectrometry for 
      the determination of V, Cr and Cu in environmental and biological samples.
PG  - 467-75
AB  - In this work, an ordered mesoporous titania film was introduced to coat a 
      capillary by means of sol-gel technique. Sol-gel titania coating was developed 
      for the preconcentration/separation of trace V, Cr and Cu by capillary 
      microextraction (CME), and the adsorbed analytes were eluted for electrothermal 
      vaporization inductively coupled plasma mass spectrometry (ETV-ICP-MS) detection. 
      By immobilizing sol-gel titania on the inner surface of a fused-silica 
      microextraction capillary, the sol-gel titania coating was prepared easily. Its 
      adsorption properties, stability and the factors affecting the adsorption 
      behaviors of V, Cr and Cu were investigated in detail. At pH range of 7 to 9, the 
      titania-coated capillary (50 cm x 0.25 mm) is selective towards V, Cr and Cu, and 
      the target analytes could be desorbed quantitatively with 50 microl of 1.0 mol 
      l(-1) HNO3 at the rate of 0.05 ml min(-1). With a consumption of 2 ml sample 
      solution, an enrichment factor of 33.3, and a detection limit (3 s) of 1.1 pg 
      ml(-1) (10.5 fg) for V; 3.3 pg ml(-1) (33.0 fg) for Cr and 6.3 pg ml(-1) (63.1 
      fg) for Cu respectively were obtained. The precisions Relative Standard 
      Deviations (RSDs) for nine replicate measurements of 1 ng ml(-1) V, Cr and Cu 
      were 3.4, 5.1 and 6.4%, respectively. The proposed method has been applied to the 
      determination of V, Cr and Cu in human urine and lake water, and the recoveries 
      for these elements were 89.2 approximately 105%. The developed method was also 
      applied to the determination of the target elements in NIES No. 10-a (rice 
      flour-unpolished) and NIES No. 9 (sargasso) certified reference materials, and 
      the results found are in good agreement with the certified values.
CI  - Copyright 2007 John Wiley & Sons, Ltd.
FAU - Wu, Yiwei
AU  - Wu Y
AD  - Department of Chemistry, Wuhan University, Wuhan 430072, P. R. China.
FAU - Hu, Bin
AU  - Hu B
FAU - Hu, Wenling
AU  - Hu W
FAU - Jiang, Zucheng
AU  - Jiang Z
FAU - Li, Boyangzi
AU  - Li B
LA  - eng
PT  - Journal Article
PT  - Research Support, Non-U.S. Gov't
PL  - England
TA  - J Mass Spectrom
JT  - Journal of mass spectrometry : JMS
JID - 9504818
RN  - 0 (Solutions)
RN  - 0 (Water Pollutants, Chemical)
RN  - 00J9J9XKDE (Vanadium)
RN  - 0R0008Q3JB (Chromium)
RN  - 15FIX9V2JP (titanium dioxide)
RN  - 789U1901C5 (Copper)
RN  - D1JT611TNE (Titanium)
SB  - IM
MH  - Adsorption
MH  - Chromium/*analysis/urine
MH  - Copper/*analysis/urine
MH  - Fresh Water/chemistry
MH  - Humans
MH  - Hydrogen-Ion Concentration
MH  - Mass Spectrometry/methods
MH  - Phase Transition
MH  - Porosity
MH  - Reference Standards
MH  - Solutions
MH  - Titanium/*chemistry
MH  - Vanadium/*analysis/urine
MH  - Water Pollutants, Chemical/*analysis
EDAT- 2007/01/30 09:00
MHDA- 2007/06/09 09:00
CRDT- 2007/01/30 09:00
PHST- 2007/01/30 09:00 [pubmed]
PHST- 2007/06/09 09:00 [medline]
PHST- 2007/01/30 09:00 [entrez]
AID - 10.1002/jms.1179 [doi]
PST - ppublish
SO  - J Mass Spectrom. 2007 Apr;42(4):467-75. doi: 10.1002/jms.1179.