文档介绍：本科毕业论文(设计)
题目:超声波提取-气相色谱质谱法测定土壤中
的酚类化合物
姓名: 李紫艺学号: 20101004109
院(系): 材化学院专业: 应用化学
指导教师: 曹颁职称: 高级工程师
鲁立强职称: 副教授
评阅人: 彭月娥职称: 副教授
2014 年6
本科生毕业论文(设计)原创性声明
本人以信誉声明:所呈交的毕业论文(设计)是在导师指导下进行的研究工作及取得的研究成果,论文中引用他人的文献、数据、图件、资料均已明确标注出,论文中的结论和结果为本人独立完成,不包含他人成果及为获得中国地质大学或其他教育机构的学位或证书而使用过的材料。与我一同工作的同志对本研究所做的任何贡献均已在论文中作了明确的说明并表示了谢意。
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摘要
本论文讨论了利用超声波提取技术将土壤中的有机酚类化合物提取出来,利用酚类化合物的弱酸性,经过酸碱法进行净化萃取,再经过旋蒸氮吹后定容,用气相色谱质谱仪(GC-MS)进行定性定量分析的方法。本方法主要对七种酚类有机污染物进行分析研究,,%~%之间。该方法回收率均在90%及以上,~ mg/L之间,符合EAP对于酚类化合物的最低浓度要求。对实际的土壤中酚类化合物进行检测,%~%之间,%~%之间。结果表明土壤中的酚类化合物经过超声波萃取的方法,操作简单,净化效果也是达到标准,可以在以后研究室中用于土壤中酚类化合物的检测。
关键字:超声波提取;气相色谱质谱仪;酚类化合物;土壤
Abstract
The paper discusses a method to determine pounds in soil by ultrasonic extraction- gas chromatography mass soil sample was extracted with methylene dichloride-hexane(2:1,V/V).For the faintly acid of the pounds, the extract was purified by alkaline aqueous solution (pH>12) and finally extracted in methylene dichloride-ethylacetate(4:1,v/v) by hydrochloric acid (pH<3). After that the extract was capacitied to 1mL by spin steaming instrument. The analytes were determined by GC-MS and quantifed by external standard method. The paper was mainly determined seven kinds of pounds in standard mixture by optimizing conditions to develop the recovery. The linear correlation coefficient of the standard crave was above , and the RSD was %~%. The extract efficients of the method were all above 90%, the limits of quantification for all testsed pounds were ~ mg/L. By determining the pounds in 10g soil samples ,the recoveries were between %~% with the RSDs in the range of %~% (n=6). The results showed that this method is accurate , sensitive and suitable for determination of the pounds in the soil..
Key words: ultrasonic extraction; GC-MS; pounds; soil
目录
第一章绪论 1
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