PMID- 21726754
OWN - NLM
STAT- MEDLINE
DCOM- 20111031
LR  - 20141120
IS  - 1873-3573 (Electronic)
IS  - 0039-9140 (Linking)
VI  - 85
IP  - 2
DP  - 2011 Aug 15
TI  - Thermo-responsive polymer coated fiber-in-tube capillary microextraction and its 
      application to on-line determination of Co, Ni and Cd by inductively coupled 
      plasma mass spectrometry (ICP-MS).
PG  - 1166-73
LID - 10.1016/j.talanta.2011.05.039 [doi]
AB  - The poly(N-isopropylacrylamide) (PNIPA) gel is a widely studied thermo-responsive 
      material that exhibits discontinuous change in volume when the external 
      temperature is increased. In this paper, PNIPA gel was prepared and applied as a 
      novel polymer coating for fiber-in-tube capillary microextraction of trace Co, Ni 
      and Cd followed by on-line ICP-MS detection. The PNIPA coating was synthesized by 
      using ethylene triethoxysilane (ETEOS) as the cross-linking agent under acidic 
      conditions. This siloxane incorporated PNIPA gel achieves a dramatically rapid 
      response rate when the external temperature is changed. The micro-structure of 
      PNIPA coating was examined by scanning electron micrograph (SEM). Various 
      experimental parameters including pH, temperature, sample flow rate and volume, 
      elution solution and interfering ions affecting the extraction of the target 
      analytes have been carefully investigated and optimized. Under the optimized 
      conditions, the limits of detection were 0.45, 4.6 and 6.9 ng L(-1) for Co, Ni 
      and Cd, respectively. With a sampling frequency of 13 h(-1), the relative 
      standard deviations (RSDs) for Co, Ni and Cd were 4.8, 5.1 and 6.4% (C=1 mug 
      L(-1), n=7), respectively. The proposed method had been successfully applied to 
      the determination of Co, Ni and Cd in human urine. To validate the proposed 
      method, certified reference materials of NIES No. 10-b rice flour and GBW07601 
      (GSH-1) human hair were analyzed and the determined values were in a good 
      agreement with the certified values. The PNIPA coated fiber-in-tube capillary can 
      be reused for more than 150 times without decreasing the extraction efficiency.
CI  - Copyright (c) 2011 Elsevier B.V. All rights reserved.
FAU - Zheng, Fei
AU  - Zheng F
AD  - Key Laboratory of Analytical Chemistry for Biology and Medicine (Ministry of 
      Education), Department of Chemistry, Wuhan University, Wuhan 430072, PR China.
FAU - Hu, Bin
AU  - Hu B
LA  - eng
PT  - Journal Article
PT  - Research Support, Non-U.S. Gov't
DEP - 20110527
PL  - Netherlands
TA  - Talanta
JT  - Talanta
JID - 2984816R
RN  - 0 (Acrylamides)
RN  - 0 (Acrylic Resins)
RN  - 0 (Metals, Heavy)
RN  - 0 (Polymers)
RN  - 00BH33GNGH (Cadmium)
RN  - 25189-55-3 (poly-N-isopropylacrylamide)
RN  - 3G0H8C9362 (Cobalt)
RN  - 7OV03QG267 (Nickel)
SB  - IM
MH  - Acrylamides/*chemistry
MH  - Acrylic Resins
MH  - Adsorption
MH  - Cadmium/analysis/blood/isolation & purification/urine
MH  - Chemical Fractionation/*methods
MH  - Cobalt/analysis/blood/isolation & purification/urine
MH  - Humans
MH  - Hydrogen-Ion Concentration
MH  - Limit of Detection
MH  - Mass Spectrometry/*methods
MH  - Metals, Heavy/*analysis/blood/*isolation & purification/urine
MH  - Nickel/analysis/blood/isolation & purification/urine
MH  - *Online Systems
MH  - Polymers/*chemistry
MH  - Reproducibility of Results
MH  - Surface Properties
MH  - *Temperature
EDAT- 2011/07/06 06:00
MHDA- 2011/11/01 06:00
CRDT- 2011/07/06 06:00
PHST- 2011/02/28 00:00 [received]
PHST- 2011/05/14 00:00 [revised]
PHST- 2011/05/19 00:00 [accepted]
PHST- 2011/07/06 06:00 [entrez]
PHST- 2011/07/06 06:00 [pubmed]
PHST- 2011/11/01 06:00 [medline]
AID - S0039-9140(11)00448-6 [pii]
AID - 10.1016/j.talanta.2011.05.039 [doi]
PST - ppublish
SO  - Talanta. 2011 Aug 15;85(2):1166-73. doi: 10.1016/j.talanta.2011.05.039. Epub 2011 
      May 27.