Novel molecularly imprinted polymer using 1-(α-methyl acrylate)-3-methylimidazolium bromide as functional monomer for simultaneous extraction and determination of water-soluble acid dyes in wastewater and soft drink by solid phase extraction and high performance liquid chromatography.
Novel water-compatible molecularly imprinted polymers were synthesized in methanol-water systems with Tratarzine as template and 1-(α-methyl acrylate)-3-methylimidazolium bromide (1-MA-3MI-Br) as functional monomer, which has π-π hydrophobic, hydrogen-bonding and electrostatic interactions with template molecule. 1-MA-3MI-Br molecularly imprinted polymers (1-MA-3MI-Br-MIPs) were used as selective sorbents for the solid-phase extraction (SPE) of water-soluble acid dyes from wastewater and soft drink. The good linearity of the method was obtained in a range of 5.0-2000 μg/L with the correlation coefficient of > 0.999. The detection limits were in a range of 0.13-0.51 μg/L for the water-soluble acid dyes in wastewater and 0.095-0.84 μg/L for those in soft drink. The mean recoveries for the acid dyes are from 89.1% to 101.0% in spiked wastewater and 91.0-101.3% in spiked soft drink. Compared with strongly anion exchange solid phase extraction (SAX-SPE), mixture anion exchange solid phase extraction (MAX-SPE), and 1-MA-3MI-Br non-imprinted solid phase extraction (1-MA-3MI-Br-NISPE), almost all of the matrix interferences were removed by 1-MA-3MI-Br-MISPE, exhibiting higher selectivity, recovery and enrichment ability for the acid dyes and better baselines in the results of HPLC analysis.
College of Environmental and Chemical Engineering, Nanchang Hangkong University, Nanchang 330063, PR China.
Xubiao
X
Luo
Youcai
Y
Zhan
Xinman
X
Tu
Yining
Y
Huang
Shenglian
S
Luo
Liushui
L
Yan
D000179:Acrylates / Q000737:chemistry; D001391:Azo Compounds / Q000032:analysis*; D001628:Beverages / Q000032:analysis*; D001965:Bromides / Q000737:chemistry; D002851:Chromatography, High Pressure Liquid / Q000379:methods*; D002852:Chromatography, Ion Exchange; D005505:Food Coloring Agents / Q000032:analysis*; D007093:Imidazoles / Q000737:chemistry*; D008855:Microscopy, Electron, Scanning; D054802:Molecular Imprinting; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity; D052616:Solid Phase Extraction / Q000379:methods*; D014867:Water / Q000032:analysis*
D000179:Acrylates; D001391:Azo Compounds; D001965:Bromides; D005505:Food Coloring Agents; D007093:Imidazoles; D014867:Water