PMID- 17681690
OWN - NLM
STAT- MEDLINE
DCOM- 20080702
LR  - 20131121
IS  - 0304-3894 (Print)
IS  - 0304-3894 (Linking)
VI  - 152
IP  - 1
DP  - 2008 Mar 21
TI  - Determination of trace lead in water samples by graphite furnace atomic 
      absorption spectrometry after preconcentration with nanometer titanium dioxide 
      immobilized on silica gel.
PG  - 166-71
AB  - Nanometer titanium dioxide immobilized on silica gel (immobilized nanometer TiO2) 
      was prepared by sol-gel method and characterized using X-ray diffraction (XRD) 
      and scanning electron microscope (SEM). The adsorptive capability of immobilized 
      nanometer TiO2 for lead was assessed in this work using column method. It was 
      found that lead can be quantitatively retained by immobilized nanometer TiO2 in 
      the pH range 4-7, then eluted completely with 1.0molL(-1) HCl. The adsorption 
      capacity of immobilized nanometer TiO2 for Pb was found to be 3.16mgg(-1). A new 
      method has been developed for the determination of trace lead based on 
      preconcentration with a microcolumn packed with immobilized nanometer TiO2 prior 
      to its determination by graphite furnace atomic absorption spectrometry (GFAAS). 
      The detection limit of this method for Pb was 9.5ngL(-1) with an enrichment 
      factor of 50, and the relative standard deviations (R.S.D.s) was 3.2% at the 
      10ngmL(-1) Pb level. The method was validated using a certified reference 
      material, and was applied for the determination of trace lead in water samples.
FAU - Liu, Rui
AU  - Liu R
AD  - Key Laboratory of Pesticide & Chemical Biology of Ministry of Education, College 
      of Chemistry, Central China Normal University, Wuhan 430079, PR China.
FAU - Liang, Pei
AU  - Liang P
LA  - eng
PT  - Journal Article
DEP - 20070629
PL  - Netherlands
TA  - J Hazard Mater
JT  - Journal of hazardous materials
JID - 9422688
RN  - 0 (Indicators and Reagents)
RN  - 0 (Water Pollutants, Chemical)
RN  - 15FIX9V2JP (titanium dioxide)
RN  - 2P299V784P (Lead)
RN  - 60650-90-0 (Silica Gel)
RN  - 7631-86-9 (Silicon Dioxide)
RN  - D1JT611TNE (Titanium)
SB  - IM
MH  - Adsorption
MH  - Hydrogen-Ion Concentration
MH  - Indicators and Reagents
MH  - Lead/*analysis
MH  - *Metal Nanoparticles
MH  - Microscopy, Electron, Scanning
MH  - Reference Standards
MH  - Reproducibility of Results
MH  - Sensitivity and Specificity
MH  - Silica Gel
MH  - Silicon Dioxide/*chemistry
MH  - Spectrophotometry, Atomic/*methods
MH  - Titanium/*chemistry
MH  - Water Pollutants, Chemical/*analysis
MH  - X-Ray Diffraction
EDAT- 2007/08/08 09:00
MHDA- 2008/07/03 09:00
CRDT- 2007/08/08 09:00
PHST- 2007/04/11 00:00 [received]
PHST- 2007/06/25 00:00 [revised]
PHST- 2007/06/25 00:00 [accepted]
PHST- 2007/08/08 09:00 [pubmed]
PHST- 2008/07/03 09:00 [medline]
PHST- 2007/08/08 09:00 [entrez]
AID - S0304-3894(07)00943-0 [pii]
AID - 10.1016/j.jhazmat.2007.06.081 [doi]
PST - ppublish
SO  - J Hazard Mater. 2008 Mar 21;152(1):166-71. doi: 10.1016/j.jhazmat.2007.06.081. 
      Epub 2007 Jun 29.