PMID- 18970666
OWN - NLM
STAT- PubMed-not-MEDLINE
DCOM- 20121002
LR  - 20081030
IS  - 1873-3573 (Electronic)
IS  - 0039-9140 (Linking)
VI  - 69
IP  - 4
DP  - 2006 Jun 15
TI  - Evaluation of expanded graphite as on-line solid-phase extraction sorbent for 
      high performance liquid chromatographic determination of trace levels of DDTs in 
      water samples.
PG  - 970-5
LID - 10.1016/j.talanta.2005.11.048 [doi]
AB  - Dichlorodiphenyltrichloroethane (DDT) and its metabolites are a typical kind of 
      persistent organic pollutants (POPs). Development of a simple, cost-effective and 
      sensitive methodology to monitor DDTs concentrations in water environment is of 
      particular significance for understanding the fate and behavior of these 
      pollutants. In this paper, a method on the basis of solid-phase extraction (SPE) 
      using expanded graphite (EG) as sorbent coupled on-line with high performance 
      liquid chromatography (HPLC) was developed for the determination of trace levels 
      of p,p'-DDD (2,2-bis(4-chlorophenyl)-1,1-dichloroethane), p,p'-DDT, o,p'-DDT and 
      p,p'-DDE (2,2-bis(4-chlorophenyl)-1,1-dichloroethene) in water. The analytes in 
      water were preconcentrated onto the SPE column packed with expanded graphite, and 
      subsequently eluted with methanol-water (90:10) mixed solvent. HPLC with a 
      photodiode array detector was used for their separation and detection. The 
      developed on-line solid-phase extraction protocol for HPLC permits the current 
      HPLC separation and the next preconcentration proceeded in parallel, and thus 
      allows one determination within 8min. The precision (R.S.D.) for 10 replicate 
      injections of a mixture of 1mugl(-1) of each analyte was 3.2-6.2% for the peak 
      area measurement. The detection limits (S/N=3) for preconcentrating 50ml of 
      sample solution ranged from 10 to 25ngl(-1) at a sample throughput of 
      7.5samplesh(-1). The enhancement factors were about 700. The method was applied 
      to the determination of trace p,p'-DDD, p,p'-DDT, o,p'-DDT and p,p'-DDE in local 
      lake, river and tap water samples.
FAU - Zhou, You-Ya
AU  - Zhou YY
AD  - Research Center for Analytical Sciences, Department of Chemistry, Nankai 
      University, Tianjin 300071, China.
FAU - Wang, Shan-Wei
AU  - Wang SW
FAU - Kim, Ki-Nam
AU  - Kim KN
FAU - Li, Ji-Hui
AU  - Li JH
FAU - Yan, Xiu-Ping
AU  - Yan XP
LA  - eng
PT  - Journal Article
DEP - 20060106
PL  - Netherlands
TA  - Talanta
JT  - Talanta
JID - 2984816R
EDAT- 2008/10/31 09:00
MHDA- 2008/10/31 09:01
CRDT- 2008/10/31 09:00
PHST- 2005/10/04 00:00 [received]
PHST- 2005/11/28 00:00 [revised]
PHST- 2005/11/29 00:00 [accepted]
PHST- 2008/10/31 09:00 [pubmed]
PHST- 2008/10/31 09:01 [medline]
PHST- 2008/10/31 09:00 [entrez]
AID - S0039-9140(05)00778-2 [pii]
AID - 10.1016/j.talanta.2005.11.048 [doi]
PST - ppublish
SO  - Talanta. 2006 Jun 15;69(4):970-5. doi: 10.1016/j.talanta.2005.11.048. Epub 2006 
      Jan 6.