Pocurull E, Marcé R M, Borrull F, Bernal J L, Toribio L, Serna M L
Department de Química, Universitat Rovira i Virgili, Tarragona, Spain.
J Chromatogr A. 1996 Nov 29;755(1):67-74. doi: 10.1016/s0021-9673(96)00574-2.
Determining of phenol and nitrophenols using solid-phase extraction on-line coupled to supercritical fluid chromatography (SFC) is studied. SFC quickly separated the compounds studied, in less than 6 min, and solid-phase extraction was used to decrease the limits of detection. C18, PLRP-S and a highly cross-linked styrene-divinylbenzene copolymer in a 10 x 3 mm I.D. laboratory-packed precolumn were tested comparatively as sorbents in the preconcentration step. Tetrabutylammonium bromide was used as ion-pair reagent in the extraction process to increase breakthrough volumes, mainly for phenol. Performance of the method was checked with tap and river waters.
研究了采用在线固相萃取与超临界流体色谱（SFC）联用测定苯酚和硝基苯酚的方法。SFC在不到6分钟的时间内快速分离了所研究的化合物，并且使用固相萃取降低了检测限。比较测试了内径为10×3mm的实验室填充预柱中填充的C18、PLRP-S和高度交联的苯乙烯-二乙烯基苯共聚物作为预浓缩步骤中的吸附剂。在萃取过程中使用溴化四丁铵作为离子对试剂以增加穿透体积，主要是针对苯酚。用自来水和河水检验了该方法的性能。
