PMID- 17511015
OWN - NLM
STAT- MEDLINE
DCOM- 20070724
LR  - 20070605
IS  - 1076-5174 (Print)
IS  - 1076-5174 (Linking)
VI  - 42
IP  - 6
DP  - 2007 Jun
TI  - Hollow-fiber liquid-phase microextraction prior to low-temperature electrothermal 
      vaporization ICP-MS for trace element analysis in environmental and biological 
      samples.
PG  - 803-10
AB  - A new method of hollow-fiber liquid-phase microextraction (HF-LPME) prior to 
      electrothermal vaporization (ETV) inductively coupled plasma mass spectrometry 
      (ICP-MS) determination of trace Cu, Zn, Pd, Cd, Hg, Pb and Bi, based on gaseous 
      compounds introduction into the plasma as their diethyldithiocarbmate (DDTC) 
      chelates, was developed. The use of the reagent DDTC as chemical modifier could 
      not only enhance the analytical signals, but also decrease the vaporization 
      temperature. At a temperature of 1300 degrees C, trace Cu, Zn, Pd, Cd, Hg, Pb and 
      Bi can be vaporized completely into the ICP. The factors affecting the formation 
      of the chelates and their vaporization behaviors were investigated in detail, and 
      the microextraction conditions were optimized. Under the optimized conditions, 
      the detection limits of the proposed method were 12.4, 28.7, 7.9, 4.5, 3.3, 4.8 
      and 1.6 pg ml(-1) for Cu, Zn, Pd, Cd, Hg, Pb and Bi, respectively. Enrichment 
      factors of 305, 284, 24, 29, 20, 73 and 43 could be achieved within 15 min of 
      extraction time, and the relative standard deviations (RSDs) for the seven 
      determinations of 0.5 ng ml(-1) of target analytes were 8.8, 6.9, 7.1, 9.4, 10.2, 
      6.1 and 10.8%, respectively. The newly developed method has been applied to the 
      determination of trace Cu, Zn, Pd, Cd, Hg, Pb and Bi in environmental water and 
      human serum samples, and the recoveries for the spiked samples were in the range 
      of 88-116%. In order to validate this method, two certified reference materials, 
      GBW08501 peach leaves and GBW(E)080040 seawater, were analyzed, and the 
      determined values were in good agreement with the certified values.
FAU - Xia, Linbo
AU  - Xia L
AD  - Department of Chemistry, Wuhan University, Wuhan 430072, PR China.
FAU - Wu, Yunli
AU  - Wu Y
FAU - Hu, Bin
AU  - Hu 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 (Environmental Pollutants)
RN  - 0 (Trace Elements)
SB  - IM
MH  - Chromatography, Liquid/*methods
MH  - Electrochemistry
MH  - Environmental Monitoring/methods
MH  - Environmental Pollutants/*analysis/chemistry
MH  - Mass Spectrometry/*methods
MH  - Reproducibility of Results
MH  - Temperature
MH  - Trace Elements/*analysis/chemistry
MH  - Volatilization
EDAT- 2007/05/19 09:00
MHDA- 2007/07/25 09:00
CRDT- 2007/05/19 09:00
PHST- 2007/05/19 09:00 [pubmed]
PHST- 2007/07/25 09:00 [medline]
PHST- 2007/05/19 09:00 [entrez]
AID - 10.1002/jms.1216 [doi]
PST - ppublish
SO  - J Mass Spectrom. 2007 Jun;42(6):803-10. doi: 10.1002/jms.1216.