Department of Chemistry, Faculty of Science, Urmia University, Urmia, Iran.
J Sep Sci. 2010 Jan;33(1):88-92. doi: 10.1002/jssc.200900472.
A new fiber based on titania-chitin sol-gel coated on a silver wire for the headspace solid phase microextraction of aliphatic alcohols from apple juice samples was developed. The influences of fiber coating composition and microextraction conditions (extraction temperature, extraction time, and ionic strength of the sample matrix) on the fiber performance were investigated. Also, the influence of temperature and time on desorption of analytes from fiber were studied. Under the optimized conditions, a porous fiber with a high extraction capacity and good thermal stability (up to 250 degrees C) was obtained. The proposed headspace solid-phase microextraction-GC method was successfully used for the analysis of aliphatic alcohols in apple juice and concentrate samples. The recovery values were from 92.8 to 98.6%. The RSD (n=5) for all analytes were below 7.8%.
一种新型纤维基于二氧化钛-甲壳素溶胶-凝胶涂覆在银线上，用于顶空固相微萃取苹果汁样品中的脂肪醇。研究了纤维涂层组成和微萃取条件（萃取温度、萃取时间和样品基质的离子强度）对纤维性能的影响。此外，还研究了温度和时间对纤维上分析物解吸的影响。在优化条件下，得到了一种具有高萃取能力和良好热稳定性（高达 250°C）的多孔纤维。所提出的顶空固相微萃取-气相色谱法成功地用于分析苹果汁和浓缩样品中的脂肪醇。回收率为 92.8%至 98.6%。所有分析物的 RSD（n=5）均低于 7.8%。
