刘瑀
主要研究兴趣有物质沿食物网传递的生物地球化学机制;船舶污染监测与检测的信息化技术;海上溢油油指纹分析技术和油指纹库的建立。
个性化签名
- 姓名:刘瑀
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学术头衔:
博士生导师
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学科领域:
地球化学
- 研究兴趣:主要研究兴趣有物质沿食物网传递的生物地球化学机制;船舶污染监测与检测的信息化技术;海上溢油油指纹分析技术和油指纹库的建立。
刘瑀,男,1965年出生,1986年毕业于北京大学,1995年于日本东北大学取得理学博士学位,1995-1997年东京都立大学博士后。现为大连海事大学环境科学与工程学院教授、博士生导师。辽宁省环境科学重点学科带头人。国际持久性有毒物质联合研究中心(大连海事大学)主任。主要研究兴趣有物质沿食物网传递的生物地球化学机制;船舶污染监测与检测的信息化技术;海上溢油油指纹分析技术和油指纹库的建立。目前承担和参与的主要项目有:国家科技支撑项目“远洋船舶压载水净化和水上溢油应急处理关键技术研究”的“远洋船舶压载水快速检测技术”;973项目“京津渤区域复合污染过程、生态毒理效应及控制修复原理”的“复合污染胁迫下近海主要生物资源的退化机制”课题;中日合作项目“流域物质循环与模拟”。
学术兼职:日本化学会会员;辽宁省海洋学会理事;中国航海学会船舶防污染分会理事;中国环境科学学会大气环境分会理事;国家海洋局“近岸海域生态环境重点实验室”学术委员会委员;国家海洋局“溢油鉴别与损害评估技术重点实验室”学术委员会委员;辽宁省环境科学重点学科带头人;科技部国际合作重点项目评审专家;交通部西部开发重大项目评审专家;日本国土交通省优秀项目获奖人;国际持久性有毒物质联合研究中心(大连海事大学)主任。
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刘瑀, Y
Geochemical Journal VOL. 34 (2000) 195-205,-0001,():
-1年11月30日
A technique for analyzing stable carbon isotope composition of organic carbon using a Nd-YAG laser microprobe system has been developed.Analyses were performed on graphite rod and silica-graphite discs made from mixtures of silica glass and graphite powders with a weight ratio as SiO2/C=3/2.The sample was ablated by the laser and simultaneously combusted by laser ablation with excess O2 to produce CO2.Replicate analyses on the two types of standards under O2-atmospheric condition (8-20 torr)are reproducible to ±0.1‰ (1σ)for δ13C)which is in agreement with accepted precision by the conventional method.In order to examine the matrix effect by other silicate minerals in natural samples during laser ablation)the silica-graphite disc samples were also combusted by laser ablation without excess O2 to produce CO2.In this case)the amounts of CO2 produced were far smaller(<1%)than those of CO2 produced with excess O2 and the δ13C values range from -18.9 to -7.5‰.Considering the mass balance)we conclude that the matrix effects of silica or other silicates on the δ13C analyses of organic carbon can be ignored because it only result in a little positive shift(<0.2‰)in δ13C values.Application of the laser microprobe technique on δ13C analyses of organic carbon to five late Archean black shale samples(Jeerinah Formation)Hamersley Basin)Western Australia)gives δ13C values that are reproducible to ±0.1–0.3‰)and the mean δ13C values range from -37.2 to -39.1‰ which are very close to the δ13C values of the kerogens extracted from these shales.The analytical results demonstrate that the laser microprobe technique developed in this study is effective for the in situ isotope analyses of organic carbon in sedimentary rocks with a good precision of ±0.1‰.
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