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《聚酰亚胺SiO2杂化材料固相微萃取涂层的制备及其应用.pdf》由会员上传分享,免费在线阅读,更多相关内容在行业资料-天天文库。
1、第24卷第7期化学研究与应用Vo1.24.No.72012年7月ChemicalResearchandApplicationJuly,2012文章编号:1004—1656(2012)07—1112-05聚酰亚胺/SiO2杂化材料固相微萃取涂层的制备及其应用申书昌,辛建娇,江艳,苏源(齐齐哈尔大学分析测试中心,黑龙江齐齐哈尔161006)摘要:本文采用溶胶.凝胶技术制备了PI/SiO:固相微萃取涂层。由均苯四甲酸酐(PMDA)和4,4-二氨基二苯醚(ODA)共聚得到的聚酰胺酸,与四乙氧基硅烷水解产生的羟基进行缩合反应,通过1一氨丙基三乙氧
2、基硅烷偶联剂键合在石英纤维表面,经过高温脱水环化生成聚酰亚胺/二氧化硅复合固相微萃取涂层。通过红外光谱、热重分析、扫描电子显微镜对涂层的结构、热稳定性、表面形貌进行了分析。采用顶空固相微萃取一气相色谱联用法测定了水中的一氯代苯、邻二氯苯、问二氯苯,色谱峰面积与浓度呈良好的线性关系,线性相关系数(r)分别为0.9977、0.9988、0.9985,最低检测限分别为0.08mg/L、0.03mg/L、0.05mg/L,相对标准偏差(n=6)分别为6.34%、4.39%、4.76%。关键词:溶胶一凝胶;聚酰亚胺/-氧化硅固相微萃取涂层;氯苯;
3、气相色谱中图分类号:0658.2文献标识码:APreparationandapplicationofpolyimide/silicahybridcoatingforsolidphasemicroextractionSHENShu-chang,XINJian-jiao,JIANGYan,SUYuan(Anal~icMandTestingCenterofqiqiharUniversity,qiqihar161006,China)Abstract:ThePL/SiO2coatingofsolid—phasemicroextractionwas
4、preparedbythesol·geltechnology.Thepolyamicacidwassynthe—sizedfrompyromelliticaciddianhydride(PMDA)and4,4"-diaminodiphenylether(ODA).TetraethoxysilaneWashydrolyzedtogener-atethesiliconalcoho1.Afterdehydrationeyclizationathightemperature,thePI/SiO2wereformedbythecondensati
5、onreactionbe—tweenthepolyamicacidandthesiliconalcoho1.PI/SiO2werebondedonthequartzfibersurfacewithcouplingagent.ThesurfacemorphologyofthecoatingWasobservatedbyscanningelectronmicroscope.ThestructureofthecoatingWasstudiedbyIR.Thether—mostabilityofthecoatingwasexaminedbyth
6、ermalanalysis.Monoehlorobenzene,o—diehlorobenzeneandm—dichlorobenzeneinaque—OUSphaseweredetectedbyheadspace·solidphasemicroextraction·gaschromatography.Intherangefrom2-12mg/L,therelation—shipbetweenthepeakareaandconcentrationofmonochlorobenzene,o—dichlorobenzeneandm-dich
7、lorobenzenewerelinear.Thecor-relationcoeficients(r)were0.9977,0.9988and0.9985respectively.The1imitsofdetectionofthemonochlorobenzene,0一diehloro—benzeneandm—dichlorobenzenewere0.081mg/i,0.03mLand0.05rag/LTherelativestandarddeviationswere6.34%,4.39%and4.76%(n=5)repectively
8、.Keywords:sol—gel;PI/SiO2solid—phasemicroextractioncoating;chlombenzene;gaschromatography收稿日期:2011-12-0
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