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应用化学
Chinese Journal of Applied Chemistry    2015, Vol. 32 Issue (1) : 104-109     DOI: 10.11944/j.issn.1000-0518.2015.01.140104
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Preparation and Properties of Formaldehyde Molecularly Imprinted Polymer and Its Application in Detectiong Formaldehyde in Aquatic Product
WU Yingchun*, NIE Feng, TANG Zhihua, LIU Dongqiang
School of Chemical and Environmental Science,Shaanxi University of Technology, Hanzhong, Shaanxi 723001, China
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Abstract  

Molecularly imprinted polymer(MIP) was prepared by optimized method using formaldehyde as template molecule,-methacrylic acid as functional monomer, ethylene glycol dimethacrylate as crosslinking agent in chloroform. The imprinted polymer has the best selective adsorption capacity when the molar ratio of template molecular, functional monomer, crosslinking agent is 1:2:20, the prepolymerization time is 4 h, and the polymerization time is 8 h. When the concentration of formaldehyde solution is2mmol/L, the adsorption capacity of MIP reaches 12.40×10-2 mmol/g. The analysis of squid water sample indicated formaldehyde concentration was 5.92 mg/Kg. At the same time, formaldehyde was not detected when the test sample was diluted 100 times, while after enriched by MIP solid-phase extraction(MIPSE) the concentration of formaldehyde was 5.76 mg/Kg. Formaldehyde MIP has high-efficiency in enriching low concentration formaldehyde for sample preparation, and there is no significant difference in the testing results.

Keywords Formaldehyde      molecularly imprinted polymer(MIP)      MIP solid-phase extraction     
CLC:  O652.6  
Fund:

Supported by Latitudinal Project of Shaanxi University of Technology(No.4250710)

Corresponding Authors: Corresponding author:WU Yingchun, associate professor; Tel:0916-2641660; Fax:0916-2641766; E-mail: 1150564649@qq.com; Research interests:spectral analysis     E-mail: 1150564649@qq.com
Received: 2014-03-31      Revised: 2014-05-20     
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WU Yingchun
NIE Feng
TANG Zhihua
LIU Dongqiang
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WU Yingchun,NIE Feng,TANG Zhihua, et al. Preparation and Properties of Formaldehyde Molecularly Imprinted Polymer and Its Application in Detectiong Formaldehyde in Aquatic Product[J]. Chinese Journal of Applied Chemistry, 2015, 32(1): 104-109.
URL:  
http://yyhx.ciac.jl.cn/EN/10.11944/j.issn.1000-0518.2015.01.140104     OR     http://yyhx.ciac.jl.cn/EN/Y2015/V32/I1/104
Fig.2

Optimization of the polymerization time

Fig.3

The adsorption isotherm of MIP and NIP

Fig.4

Scatchard plots of MIP

Fig.1

Optimization of the pre-polymerization time

Fig.5

Curve of adsorption changing with time

Structural analogues 102Q(MIP)/(mmol·g-1) 102Q(NIP)/(mmol·g-1)
maldehyde 13.2 6.1
acetaldehyde 3.4 3.2
propanal 2.8 2.9
benzaldehyde 1.7 2.0
Table 1

Adsorption of the template and structural analogues on the MIP and NIP

Samples ρ(HCHO)/(mg·L-1) RSD/% HCHO content in aquatic product/(mg·kg-1)
A 0.74 0.38 5.92
B not detected
C 0.23 1.2 5.76
Table 2

Detection of formaldehyde in aquatic product

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