PMID- 17610216
OWN - NLM
STAT- MEDLINE
DCOM- 20071029
LR  - 20070711
IS  - 0951-4198 (Print)
IS  - 0951-4198 (Linking)
VI  - 21
IP  - 15
DP  - 2007
TI  - Use of a microcolumn packed with modified carbon nanofibers coupled with 
      inductively coupled plasma mass spectrometry for simultaneous on-line 
      preconcentration and determination of trace rare earth elements in biological 
      samples.
PG  - 2524-8
AB  - In this work, a new method was developed for the determination of trace rare 
      earth elements (REEs) in biological samples by inductively coupled plasma mass 
      spectrometry (ICP-MS) after preconcentration on a microcolumn packed with 
      modified carbon nanofibers (CNFs). CNFs oxidized with nitric acid have been 
      proved to possess an exceptional adsorption capability for REEs due to their 
      surface functionalization. The effects of the experimental parameters, including 
      pH, sample flow rate and volume, elution solution and interfering ions, on the 
      recoveries of the analytes have been investigated systematically. A 100-fold 
      enrichment factor was obtained. The adsorption capacity of CNFs was found to be 
      18.1, 19.3, 23.6, 17.6, 22.3 and 19.5 mg/g for La, Ce, Sm, Eu, Dy and Y, 
      respectively. Under the optimum conditions, the detection limits of this method 
      ranged from 0.2 pg/mL (Dy) to 1.2 pg/mL (Ce) with an enrichment factor of 
      15-fold, and the relative standard deviations (RSDs) for the determination of 
      REEs at the 1.0 ng/mL level were less than 4% (n = 9). This method was applied to 
      the analysis of trace REEs in a real sample of human hair with recoveries of 
      95-115%. In order to validate the proposed method, a certified reference material 
      of human hair (GBW 07601) was analyzed with satisfactory results.
CI  - Copyright (c) 2007 John Wiley & Sons, Ltd.
FAU - Chen, Shizhong
AU  - Chen S
AD  - Key Laboratory, Wuhan Polytechnic University, Wuhan 430023, China. 
      chenshizhong62@163.com
FAU - Xiao, Mingfa
AU  - Xiao M
FAU - Lu, Dengbo
AU  - Lu D
FAU - Zhan, Xilin
AU  - Zhan X
LA  - eng
PT  - Journal Article
PT  - Research Support, Non-U.S. Gov't
PL  - England
TA  - Rapid Commun Mass Spectrom
JT  - Rapid communications in mass spectrometry : RCM
JID - 8802365
RN  - 0 (Metals, Rare Earth)
RN  - 7440-44-0 (Carbon)
SB  - IM
MH  - Carbon/*chemistry
MH  - Hair/*chemistry
MH  - Humans
MH  - Metals, Rare Earth/*analysis
MH  - Nanostructures/*chemistry
MH  - Spectrophotometry, Atomic/*methods
EDAT- 2007/07/05 09:00
MHDA- 2007/10/30 09:00
CRDT- 2007/07/05 09:00
PHST- 2007/07/05 09:00 [pubmed]
PHST- 2007/10/30 09:00 [medline]
PHST- 2007/07/05 09:00 [entrez]
AID - 10.1002/rcm.3123 [doi]
PST - ppublish
SO  - Rapid Commun Mass Spectrom. 2007;21(15):2524-8. doi: 10.1002/rcm.3123.