PMID- 25209546
OWN - NLM
STAT- PubMed-not-MEDLINE
DCOM- 20150521
LR  - 20141015
IS  - 1364-5528 (Electronic)
IS  - 0003-2654 (Linking)
VI  - 139
IP  - 22
DP  - 2014 Nov 21
TI  - Two novel zeolitic imidazolate frameworks (ZIFs) as sorbents for solid-phase 
      extraction (SPE) of polycyclic aromatic hydrocarbons (PAHs) in environmental 
      water samples.
PG  - 5818-26
LID - 10.1039/c4an01410c [doi]
AB  - In this work, two novel zeolitic imidazolate framework (ZIF) materials, ZIF-7 and 
      ZIF-11, were firstly introduced as solid-phase extraction (SPE) sorbents for PAHs 
      efficient extraction and highly sensitive analysis in environmental water samples 
      with high performance liquid chromatography (HPLC) coupled with fluorescence 
      detection. ZIF-7 and ZIF-11 were successfully synthesized and characterized with 
      SEM, FTIR, XRD and water contact angels, exhibiting unique and excellent 
      stability, spatial structure and chemical composition, promising for 
      environmental PAHs efficient enrichment through hydrophobic, pi-pi and 
      pi-complexation interactions. The topology effect on PAHs extraction was compared 
      between ZIF-7 and ZIF-11, considering they have the same composition in metal ion 
      (Zn(2+)) and organic linker, but differing spatial structures: ZIF-7 has a cubic 
      structure, while ZIF-11 is a rhombic dodecahedron. At last, ZIF-11 with markedly 
      better extraction efficiencies was selected for subsequent analysis. Under 
      optimum extraction conditions such as sample volume, extraction time, desorption 
      conditions, volume of organic modifier and salt concentration, a robust and 
      highly efficient method based on ZIF-11 as a novel SPE sorbent has been 
      successfully developed for environmental PAHs analysis. Satisfactory precision 
      and accuracy ranging from 1-2.4 x 10(3) ng L(-1) as well as ultrasensitive 
      detection limits of 0.08-1.6 ng L(-1) have been successfully achieved. Moreover, 
      ZIF-11 extraction also exhibited high recoveries of 82.4-112.7% with relative 
      standard deviations (RSDs) being less than 9% for PAHs in the environmental water 
      samples. Therefore, our novel, convenient and efficient extraction method based 
      on ZIF-11 as a sorbent is promising for applications in future trace-level 
      environmental PAHs analyses.
FAU - Hu, Huiping
AU  - Hu H
AD  - State Key Laboratory of Chemo/Biosensing & Chemometrics, College of Chemistry & 
      Chemical Engineering, Hunan University, Changsha 410082, China. szyao@hnu.edu.cn 
      shengquanliu7068@163.com.
FAU - Liu, Shengquan
AU  - Liu S
FAU - Chen, Chunyan
AU  - Chen C
FAU - Wang, Jianping
AU  - Wang J
FAU - Zou, Ying
AU  - Zou Y
FAU - Lin, Lihua
AU  - Lin L
FAU - Yao, Shouzhuo
AU  - Yao S
LA  - eng
PT  - Journal Article
PL  - England
TA  - Analyst
JT  - The Analyst
JID - 0372652
EDAT- 2014/09/12 06:00
MHDA- 2014/09/12 06:01
CRDT- 2014/09/12 06:00
PHST- 2014/09/12 06:00 [entrez]
PHST- 2014/09/12 06:00 [pubmed]
PHST- 2014/09/12 06:01 [medline]
AID - 10.1039/c4an01410c [doi]
PST - ppublish
SO  - Analyst. 2014 Nov 21;139(22):5818-26. doi: 10.1039/c4an01410c.