PMID- 19073042
OWN - NLM
STAT- PubMed-not-MEDLINE
DCOM- 20121002
LR  - 20081216
IS  - 1873-3573 (Electronic)
IS  - 0039-9140 (Linking)
VI  - 73
IP  - 2
DP  - 2007 Sep 15
TI  - MPTS-silica coated capillary microextraction on line hyphenated with inductively 
      coupled plasma atomic emission spectrometry for the determination of Cu, Hg and 
      Pb in biological samples.
PG  - 372-9
LID - 10.1016/j.talanta.2007.03.060 [doi]
AB  - A novel sol-gel 3-mercaptopropyltrimethoxysilane (MPTS) modified silica coating 
      was developed for capillary microextraction (CME) of trace Cu, Hg and Pb prior to 
      their on line determination by inductively coupled plasma-atomic emission 
      spectrometry (ICP-AES). This organic-inorganic hybrid coating was in situ created 
      on the inner walls of fused silica capillary using a sol solution containing TMOS 
      (tetramethoxysilane) as a precursor, MPTS as a co-precursor, ethanol as the 
      solvent and hydrochloric acid as a catalyst. The structure of the capillary 
      coating was characterized by FT-IR spectroscopy, Raman spectroscopy, SEM and TEM. 
      The factors affecting on the capillary microextraction of analytes such as pH, 
      sample flow rate and volume, elution solution and interfering ions had been 
      investigated, and the optimized experimental parameters were obtained. Under the 
      optimized conditions, the absorption capacity of MPTS-silica coated capillary was 
      found to be 1.17, 1.96 and 1.19mugm(-1) for Cu, Hg and Pb, and the limits of 
      detection were as low as 0.17 0.22 and 0.52ngmL(-1), respectively. With a 
      sampling frequency of 12h(-1), the relative standard deviations (R.S.D.s) were 
      4.2, 2.6 and 3.8% (C=4ngmL(-1), n=7, sample volume=1mL) for Cu, Hg and Pb, 
      respectively. The proposed method had been successfully applied to the 
      determination of Cu, Hg and Pb in human urine, human serum and preserved egg. To 
      validate the proposed method, certified reference materials of BCR151 milk 
      powder, GBW07601 (GSH-1) human hair, GSBZ 50016-90 and GSB 07-1183-2000 water 
      samples were analyzed and the determined values were in a good agreement with the 
      certified values.
FAU - Zheng, Fei
AU  - Zheng F
AD  - Department of Chemistry, Wuhan University, Wuhan 430072, PR China.
FAU - Hu, Bin
AU  - Hu B
LA  - eng
PT  - Journal Article
DEP - 20070408
PL  - Netherlands
TA  - Talanta
JT  - Talanta
JID - 2984816R
EDAT- 2007/09/15 00:00
MHDA- 2007/09/15 00:01
CRDT- 2008/12/17 09:00
PHST- 2006/11/20 00:00 [received]
PHST- 2007/03/28 00:00 [revised]
PHST- 2007/03/29 00:00 [accepted]
PHST- 2008/12/17 09:00 [entrez]
PHST- 2007/09/15 00:00 [pubmed]
PHST- 2007/09/15 00:01 [medline]
AID - S0039-9140(07)00262-7 [pii]
AID - 10.1016/j.talanta.2007.03.060 [doi]
PST - ppublish
SO  - Talanta. 2007 Sep 15;73(2):372-9. doi: 10.1016/j.talanta.2007.03.060. Epub 2007 
      Apr 8.