期刊文献+
共找到2篇文章
< 1 >
每页显示 20 50 100
ZIF-8@Fe3O4磁性固相萃取结合高效液相色谱法测定果汁中3种苯甲酰脲杀虫剂 被引量:8
1
作者 武鑫 王翰云 +4 位作者 安壮壮 李子凌 贾叶青 王曼曼 郝玉兰 《分析测试学报》 CAS CSCD 北大核心 2020年第5期583-589,共7页
发展了磁性沸石咪唑酯骨架材料(ZIF-8@Fe3O4)磁性固相萃取结合高效液相色谱-二极管阵列检测器,测定果汁中氟幼脲、四螨嗪和氟啶脲3种苯甲酰脲杀虫剂(BUs)的新方法。利用X射线衍射仪、傅立叶变换红外光谱仪、扫描电子显微镜和振动样品磁... 发展了磁性沸石咪唑酯骨架材料(ZIF-8@Fe3O4)磁性固相萃取结合高效液相色谱-二极管阵列检测器,测定果汁中氟幼脲、四螨嗪和氟啶脲3种苯甲酰脲杀虫剂(BUs)的新方法。利用X射线衍射仪、傅立叶变换红外光谱仪、扫描电子显微镜和振动样品磁强计对合成的ZIF-8@Fe3O4吸附剂进行表征,考察了溶液pH值、吸附剂用量、吸附时间、洗脱溶剂种类和体积(单次洗脱体积×洗脱次数)对BUs萃取效率的影响。在最优实验条件下,氟幼脲和四螨嗪在2.0~200 ng/mL、氟啶脲在3.5~350 ng/mL范围内线性关系良好(相关系数r=0.999),检出限(S/N=3)和定量下限(S/N=10)分别为0.6~1.0 ng/mL和2.0~3.5 ng/mL。3个加标水平下的回收率为82.7%~98.6%,日内和日间(n=3)相对标准偏差(RSD)分别为1.2%~6.1%和1.3%~9.0%。当上样体积为10 mL时,ZIF-8@Fe 3O 4对果汁中3种BUs的富集倍数为43.4~48.1倍,吸附剂重复使用10次后,3种BUs回收率的RSD不大于8.8%。该方法灵敏、高效,可用于果汁样品中BUs的分析。 展开更多
关键词 ZIF-8@Fe3O4 磁性固相萃取 苯甲酰脲杀虫剂 果汁 高效液相色谱
下载PDF
A research on the path and policy of urban energy transformation:A case study of Huzhou city in Zhejiang province
2
作者 wang han-yun DENG Liang-chen +2 位作者 wang Juan ZHOU Fu-qiu LI Shu-yi 《Ecological Economy》 2021年第3期232-240,共9页
Urban energy transformation is important to promote China’s energy transformation,to facilitate ecological civilization construction,and to achieve the goal of carbon peak and carbon neutrality.In recent years,Huzhou... Urban energy transformation is important to promote China’s energy transformation,to facilitate ecological civilization construction,and to achieve the goal of carbon peak and carbon neutrality.In recent years,Huzhou,a city of Zhejiang Province,has actively promoted the"ecology+power"city construction.It has explored an innovative mode of urban energy transformation and gained rich practical experience,which has widely attracted attention at home and abroad.Based on field research,this paper makes a comprehensive collation of policies and practical experience of Huzhou’s"ecology+power"mode and summarizes the mode characteristics and promotion value of Huzhou’s urban energy transformation.Finally,taking Huzhou as a sample,we put forward some policy suggestions of China’s urban energy transformation. 展开更多
关键词 energy transformation ecology+power Huzhou city
下载PDF
上一页 1 下一页 到第
使用帮助 返回顶部