Preparation And Application Of Polymer Matrix Anion Exchange SPE Packing

In this paper,the N-(3-two dimethylaminopropyl)methyl acrylamide(DMAPMA)and styrene(St)as raw material,polyvinyl alcohol(PVA)as dispersing agent,benzoyl peroxide(BPO)as initiator,divinyl benzene(DVB)as crosslinking agent,the anion exchange solid-phase extraction fillers were obtained by suspension polymerization.The filler particle is spherical,the particle size distribution between 40~60?m.The structure of the synthetic filler was characterized by infrared spectrum.,the morphology of the synthetic filler microsphere was observed by scanning electron microscope,the chemical environment of the surface elements of the composite filler were analyzed by X-ray spectrum.The adsorption capacity of SPE packing for phenol,p-nitrophenol and m-nitrophenol,o-cresol,4-chlorophenol were 8.01 mg/g,7.39 mg/g,7.33 mg/g,7.43 mg/g,7.56 mg/g.In the range of 10 to 70 mg/L,there was a good linear relationship between the peak area of the 5components and concentration,and the correlation coefficients were 0.9991,0.9993,0.9990,0.9991,0.9998.The packing was made of solid phase extraction column extracted phenol,p-nitrophenol,m-nitrophenol,o-cresoland 4-chlorophenol from solution,eluted by ultra performance liquid chromatography to detect the content,the recoveries five kinds of phenol rate were 87.06%,87.37%,86.76%,87.94%,89.92%respectively.The relative standard deviations(RSD)of the 5 phenols were 3.37%,4.31%,2.89%,2.52%,2.39%respectively.The lowest detection lines for phenol,p-nitrophenol,nitrophenol,and4-chlorophenol were 1.5?g/L,0.30?g/L,0.66?g/L,1.1?g/L and 0.48?g/L.Determination of four phenolic antioxidants methyl gallate,ethyl gallate,propyl gallate,butyl gallate in fried instant noodles by solid phase extraction and ultra performance liquid chromatography.The adsorption capacity of SPE packing for methyl gallate,ethyl gallate,propyl gallate,butyl gallate were 8.17 mg/g,8.51 mg/g,8.20 mg/g,6.25 mg/g respectively.In the range of 10 mg/L to 60 mg/L concentration there was a good linear relationship between the peak area of the 4 components and concentration,and the correlation coefficients(R~2)were 0.9983,0.9988,0.9972,0.9977.The relative standard deviations(RSD)1.73%,2.95%,3.76%and 4.25%respectively.The packing was made of solid phase extraction column extracted methyl gallate,ethyl gallate,propyl gallate and butyl gallate and eluted with acetonitrile(1%acetic acid)and then detemrined by UPLC.The recoveries rate were 90.95%,89.52%,88.05%,87.27%respectively.The lowest detection limits of methyl gallate,ethyl gallate,propyl gallate and butyl gallate were 0.54?g/L,0.57?g/L,0.30?g/L and 0.64?g/L respectively.