大鼠脑脊液中甲基叔丁基醚的气相色谱测定法

Determination of Methyl Tertiary Butyl Ether in Cerebrospinal Fluid of Rats by Gas Chromatography

目的建立大鼠脑脊液中甲基叔丁基醚(methy ltertiary butyl ether,MTBE)的测定方法,检测MTBE能否透过血脑屏障,为进一步研究MTBE的神经毒性提供依据。方法雄性SD大鼠9只,随机分为3组,每组3只,对照组(不给予任何处理)、灌胃组(1000mg/kg)及吸入染毒组(8ml/L),30d,每天1次,于末次染毒后6、12、24h提取脑脊液,以气相色谱法检测大鼠脑脊液中的MTBE。结果亚急性灌胃及呼吸道染毒MTBE后,气相色谱法可以检测到大鼠脑脊液中MTBE的存在。结论该方法适于大鼠脑脊液中MTBE的测定。

Objective To establish a method for the determination of methyl tertiary butyl ether (MTBE) in the cerebrospinal fluid of rats by gas chromatography and to know whether MTBE can penetrate the blood brain barrier. Methods 9 male SD rats were randomly divided into 3 groups and then exposed to MTBE by gavage at a dose of 1000 mg/kg·bw and by inhalation at a dose of 8 ml/L for 30 days. The cerebrospinal fluid was collected at 6 h, 12 h and 24 h respectively at the end of treatment and the MTBE in rats cerebrospinal fluid was determined by gas chromatography. Results MTBE was detected in the cerebrospinal fluid of rats after subchronic exposure of MTBE through gavage and inhalation. Conclusion MTBE is able to penetrate the blood brain barrier and reach the brain.