浙江舟山潮间带沉积物中二甲苯的检测  

Determination of Xylene in Interdial Sediments in Zhoushan,Zhejiang Province

作　　者：朱四喜[1] 周唯[2] 杨红丽[1] 陈钰[1] 南海龙[1] 

机构地区：[1]浙江海洋学院海洋科学学院浙江省海洋养殖装备与工程技术重点实验室,浙江舟山316004 [2]浙江大学软件学院(宁波),浙江宁波315103

出　　处：《广东化工》2010年第9期125-127,共3页Guangdong Chemical Industry

基　　金：浙江海洋学院校级课题(X06LY04);国家科技支撑计划项目(2007BAD43B00)

摘　　要：文章采用超声波萃取气相色谱法测定舟山潮间带沉积物二甲苯。实验对萃取剂进行了比较,并对气相色谱的程序升温和样品前处理条件进行了优化,最终选择二硫化碳作萃取剂,采用超声波提取法,即取30mL萃取剂萃取45min,浓缩温度35℃的条件为最佳条件,并以70℃保持5min,以2℃/min升至80℃保持2min,再以20℃/min升至120℃,保持1min的程序升温。结果表明间二甲苯、对二甲苯和邻二甲苯在10min内得到了良好分离,相对标准偏差为3.8%～13.0%。测得潮间带沉积物中这些苯系物的质量比范围为40.24～124.45mg/kg。The study used the ultrasonic wave extraction-gas chromatography to determine xylene in the interdial sediments of Zhoushan in Zhejiang province. To obtain an optimum condition, the important factors were applied to the experiments as follow： carbon bisulfide as the extracting agent, using the ultrasonic wavc extraction, and 30 mL extracting agent to extract for 45 min. 35 ℃ as the concentration temperature. Under these optimum conditions, 70 ℃ maintains 5 min, by 2 ℃/min climbs to 80 ℃ maintains 2 rain, then by 20 ℃/min climbs to 120 ℃, maintains 1 rain; m-, p- and o-xylcnc were in good separation within 10 min. RSD was 3.8 %- 13.0 %. The BETX mass ratio scope obtained in the marine sediments was 40.24- 124.45 mg/kg.

关 键 词：气相色谱 超声波萃取 间二甲苯 对二甲苯 邻二甲苯 潮间带沉积物 

分 类 号：O65[理学—分析化学]