分析科学学报
分析科學學報
분석과학학보
JOURNAL OF ANALYTICAL SCIENCE
2010年
1期
1-5
,共5页
液相沉积%纳米二氧化硅%毛细管电色谱%十八烷基
液相沉積%納米二氧化硅%毛細管電色譜%十八烷基
액상침적%납미이양화규%모세관전색보%십팔완기
Liquid phase deposition%Silica nanoparticle%Capillary electrochromatography%Octadecyl
采用液相沉积技术制备了纳米二氧化硅涂层毛细管,经十八烷基改性,将其作为开管毛细管电色谱(OTCEC)分离介质.研究了该涂层毛细管的电渗流行为,考察了烷基苯和多环芳烃的毛细管电色谱分离性能.结果表明,该涂层固定相对这些化合物表现出较强的疏水作用;增加液相沉积涂层次数有利于增加溶质的保留因子,四种多环芳烃和四种苯同系物在该柱上可实现基线分离.此外,该涂层制备简单、重现性好,并在应用中表现出较高的稳定性.
採用液相沉積技術製備瞭納米二氧化硅塗層毛細管,經十八烷基改性,將其作為開管毛細管電色譜(OTCEC)分離介質.研究瞭該塗層毛細管的電滲流行為,攷察瞭烷基苯和多環芳烴的毛細管電色譜分離性能.結果錶明,該塗層固定相對這些化閤物錶現齣較彊的疏水作用;增加液相沉積塗層次數有利于增加溶質的保留因子,四種多環芳烴和四種苯同繫物在該柱上可實現基線分離.此外,該塗層製備簡單、重現性好,併在應用中錶現齣較高的穩定性.
채용액상침적기술제비료납미이양화규도층모세관,경십팔완기개성,장기작위개관모세관전색보(OTCEC)분리개질.연구료해도층모세관적전삼류행위,고찰료완기분화다배방경적모세관전색보분리성능.결과표명,해도층고정상대저사화합물표현출교강적소수작용;증가액상침적도층차수유리우증가용질적보류인자,사충다배방경화사충분동계물재해주상가실현기선분리.차외,해도층제비간단、중현성호,병재응용중표현출교고적은정성.
A silica nanoparticle (SiO_2 NP)-deposited capillary fabricated by liquid phase deposition (LPD) followed by modification with octadecyl groups was introduced as the separation medium in open tubular capillary electrochromatography (OTCEC). Two groups of nonpolar compounds, polycyclic aromatic hydrocarbons (PAHs) and benzene derivatives, were selected to evaluate its separation performance. Hydrophobic interaction was concluded to be the main retention mechanism, and the retention factors of the analytes were increased with the increase in deposition times. Furthermore, the capillary coating fabricated by LPD was demonstrated to be reproducible and stable.
