中国科学院机构知识库网格系统: 检索

浏览/检索结果: 共3条，第1-3条

帮助

条数/页：排序方式：
	Strength Characteristics and Slope Stability Analysis of Expansive Soil with Filled Fissures 期刊论文 OAI收割 APPLIED SCIENCES-BASEL, 2020, 卷号: 10, 期号: 13, 页码: 16 作者: Dai, Zhangjun; Guo, Jianhua; Luo, Hongming; Li, Jian; Chen, Shanxiong \| 收藏 \| 浏览/下载：21/0 \| 提交时间：2021/05/25 expansive soil filled fissure triaxial test sample preparation device strength characteristics slope stability sliding surface
	Recent developments in solid-phase microextraction for on-site sampling and sample preparation 期刊论文 OAI收割 trac-trends in analytical chemistry, 2011, 卷号: 30, 期号: 10, 页码: 1568-1574 作者: Duan, Chunfeng; Shen, Zheng; Wu, Dapeng; Guan, Yafeng 收藏 \| 浏览/下载：19/0 \| 提交时间：2012/07/09 Fiber solid-phase microextraction In-needle solid-phase microextraction Microextraction by packed sorbent (MEPS) Needle-trap device On site Sample preparation Sampling Solid-phase microextraction (SPME) Stir-bar sorptive extraction (SBSE) Thin-film microextraction
	A sensitive solid-phase time-resolved fluorescence immunoassay apparatus (EI CONFERENCE) 会议论文 OAI收割 International Symposium on Photoelectronic Detection and Imaging 2009: Laser Sensing and Imaging, June 17, 2009 - June 19, 2009, Beijing, China 作者: Song K.-F.; Li J.-L.; Zhang W.-L.; Wang Y.-L. 收藏 \| 浏览/下载：37/0 \| 提交时间：2013/03/25 In the device a He-Ne laser of flash frequency 1-20 Hz was adopted as exciting light source and three key technical problems have been solved successfully in order to enhance the detecting sensitivity and measuring stability of the device for time-resolved fluorimmunoassays(TRFIA) [1]. The first one is to design optimum exciting optical system so that the exciting light beam excite the sample most effectively. The second one is to have a project spectrum filter which can reduce the affection of the background light to the photomultiplier tube and also ensure influence of the stray light and mixed diffusion light to the sample fluorescence to the least the sample fluorescence through the integrating sphere and come to the grating monochromator The right wavelength will be chosed through changing the angle of incidence of the grating monochromator. The third one is to simulate the principle of sample averaging of BOXCAR averager. In the device SCM was used as primary controller and CPLD was used as timing controller. Through the preparation process signal-to-noise ratio(SNR) will be improved also adjust delay time ampling frequency and sampling number arbitrarily. By testing the sensitivity is 10-12mol/L(substance marked by Eu3+) examination repeat is &le2.5% examination linearity is from 10 -8mol/L to 10-12mol/L correlation coefficient is 99.98%(p&le0.01). The instrument is advanced for ultrasensitive detection of antigen and antibody and solve the tumor genetic variation the virus protein detection. 2009 SPIE.