| 多规格硅橡胶萃取棒的萃取性能研究 |
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| 引用本文： | 纪祥娟,孙文,杨常光,兰孝征.多规格硅橡胶萃取棒的萃取性能研究[J].分析试验室,2010,29(10). |
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| 作者姓名： | 纪祥娟 孙文 杨常光 兰孝征 |
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| 作者单位： | 1. 鲁南煤化工研究院,济宁,272000
2. 山东农业大学化学与材料科学学院,泰安,271018 |
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| 摘 要： | 采用溶胶-凝胶-硫化法,以甲基乙烯基硅橡胶和乙烯基封端硅橡胶为原料,制备了6种规格的搅拌棒,分别为2 cm(涂层3 mg、8 mg、13 mg)和1 cm、2 cm、3 cm(涂层皆8 mg)。以多环芳烃为目标分析物,考察了搅拌棒的萃取效率。结果表明,萃取条件不变,分子量小的多环芳烃,增加涂层厚度或体积,可提高萃取效率。分子量大的多环芳烃,要提高萃取效率,除具备一定的萃取体积,还要有足够的表面积。用长度1 cm(涂层3 mg、6 mg)、长度2 cm(涂层3 mg)、长度3 cm(涂层6 mg、13 mg)的搅拌棒,优化条件下,萃取5 min~30 min时,多环芳烃的检出限2 ng/L~140 ng/L,各组分峰面积的相对标准偏差小于12%。实际样品雨水的分析,发现了萘及苊的存在。
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| 关 键 词： | 溶胶-凝胶-硫化法 搅拌棒吸附萃取 萃取效率 痕量分析 |
Performance of several home-made silicone rubber stir bars |
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| JI Xiang-juan,SUN Wen,FANG Chang-guang,LAN Xiao-zheng.Performance of several home-made silicone rubber stir bars[J].Chinese Journal of Analysis Laboratory,2010,29(10). |
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| Authors: | JI Xiang-juan SUN Wen FANG Chang-guang LAN Xiao-zheng |
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| Institution: | JI Xiang-juan1,SUN Wen1,YANG Chang-guang2 and LAN Xiao-zheng2(1.Lunan Institute of Coal Chemical Industry,Jining 272000,2.College of Chemistry and Materials Science,Shandong Agricultural University,Tai'an 271018) |
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| Abstract: | Sorptive extraction stir bars with different lengths and coating thicknesses were prepared by a new procedure named sol-gel-sulfurization from methyl-vinyl and vinyl-terminated silicone rubbers.The stir bars were 2 cm long(mass of coating,3 mg,8 mg,13 mg),1 cm,2 cm and 3 cm(all of 8 mg),respectively.The extraction efficiencies for polycyclic aromatic hydrocarbons(PAHs) were investigated.The results indicates that the extraction for the smaller PAHs can be increased by the bars with a thicker or a larger vol... |
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| Keywords: | Sol-gel-sulfurization method Stir bar sorptive extraction Extraction efficiency Trace analysis |
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