PMID- 18371765
OWN - NLM
STAT- MEDLINE
DCOM- 20080430
LR  - 20191210
IS  - 1873-3573 (Electronic)
IS  - 0039-9140 (Linking)
VI  - 74
IP  - 5
DP  - 2008 Feb 15
TI  - Dispersive liquid phase microextraction (DLPME) combined with graphite furnace 
      atomic absorption spectrometry (GFAAS) for determination of trace Co and Ni in 
      environmental water and rice samples.
PG  - 1160-5
LID - 10.1016/j.talanta.2007.08.022 [doi]
AB  - A new method of dispersive liquid phase microextraction (DLPME) combined with 
      graphite furnace atomic absorption spectrometry (GFAAS) was proposed for the 
      determination of trace Co and Ni using 1-(2-pyridylazo) 2-naphthol (PAN) as 
      chelating reagent. Several factors influencing the microextraction efficiency of 
      Co and Ni and their subsequent determinations, such as pH, extraction and 
      disperser solvent type and their volume, concentration of the chelating agent, 
      extraction time and ashing temperature and atomization temperature were studied, 
      and the optimized experimental conditions were established. After extraction, the 
      enrichment factors were 101 and 200 for Co and Ni, respectively. The detection 
      limits of the method were 21 and 33pg/mL for Co and Ni, and the relative standard 
      deviations (R.S.Ds.) for five determinations of 0.5ng/mL Co and Ni were 7.5% and 
      8.2%, respectively. The results for the determination of Co and Ni in East Lake 
      water, Yangtse River water, Dongbei rice and spiked samples have demonstrated the 
      accuracy, recovery and applicability of the proposed method. To validate the 
      proposed method, two certified reference materials of Environment Water 
      (GSBZ50009-88) and NIES No.10-b rice flour were analyzed, and the determined 
      values were in good agreement with the certified values.
FAU - Jiang, Hongmei
AU  - Jiang H
AD  - Department of Chemistry, Wuhan University, Wuhan 430072, China.
FAU - Qin, Yongchao
AU  - Qin Y
FAU - Hu, Bin
AU  - Hu B
LA  - eng
PT  - Journal Article
PT  - Research Support, Non-U.S. Gov't
PT  - Validation Study
DEP - 20070825
PL  - Netherlands
TA  - Talanta
JT  - Talanta
JID - 2984816R
RN  - 0 (Chelating Agents)
RN  - 0 (Water Pollutants)
RN  - 3G0H8C9362 (Cobalt)
RN  - 7OV03QG267 (Nickel)
SB  - IM
MH  - Chelating Agents
MH  - Cobalt/*analysis
MH  - Fresh Water/*chemistry
MH  - Hydrogen-Ion Concentration
MH  - Nickel/*analysis
MH  - Oryza/*chemistry
MH  - Spectrophotometry, Atomic/*methods/standards
MH  - Water Pollutants/analysis
EDAT- 2008/03/29 09:00
MHDA- 2008/05/01 09:00
CRDT- 2008/03/29 09:00
PHST- 2007/06/26 00:00 [received]
PHST- 2007/08/20 00:00 [revised]
PHST- 2007/08/21 00:00 [accepted]
PHST- 2008/03/29 09:00 [pubmed]
PHST- 2008/05/01 09:00 [medline]
PHST- 2008/03/29 09:00 [entrez]
AID - S0039-9140(07)00577-2 [pii]
AID - 10.1016/j.talanta.2007.08.022 [doi]
PST - ppublish
SO  - Talanta. 2008 Feb 15;74(5):1160-5. doi: 10.1016/j.talanta.2007.08.022. Epub 2007 
      Aug 25.