LA-MC-ICPMS 分析室
简介
分析室的功能是进行各类样品的元素和同位素分析，分析室拥有一个恒温、恒湿的千级洁净仪器间和达到千级和百级的化学前处理间。
分析室室位于临港校区的实验楼3楼，于2016年建成。
主要仪器
实验室主要有4台大型仪器：电感耦合等离子体质谱仪（ICPMS），激光剥蚀系统（LA），多接收电感耦合等离子体质谱仪（MC-ICPMS），和液态水H-O同位素分析仪（LGR）。
ICPMS (Agilent, 型号 7900)
这是一款配备碰撞池的四级杆质谱，采用最新的技术和最新的MassHunter软件。可以耐受基质含量高达25%的样品测定，具有高达11个数量级的动态检测范围，即从亚ppt级到百分含量级，He（H2）碰撞池模式可以最大程度的减少干扰离子的产生。漂移校正可以保证数据的高质量和高精度，即使在很低的ppt级，RSD也能小于5%。此款仪器还配备有激光剥蚀系统接口，当与激光进行联机时，可以进行原位微区的元素和U-Pb定年分析。
激光剥蚀系统(ASI resolution, 型号 LR)
此仪器为193nm的ArF气体准分子激光，它主要用于固体样品的元素和同位素分析。使用软件为Geostar，并且在样品传输过程中配备有信号平滑装置。样品剥蚀池可以放置薄片，1英寸圆形靶以及其他不规则形状。有5种剥蚀模式可选，如单点剥蚀，横切面剥蚀和设定区域剥蚀等。已配备有多种标准样品，如NIST系列，USGS系列和MAP-DING系列。
MC-ICPMS (Thermo Fisher Scientific, 型号NEPTUNE plus)
Neptune plus是一款双聚焦磁质谱仪器，配备有9个法拉第杯，3个SEM和4个CDD. 可以对周期表中大多数同位素进行测定，广泛应用于地质、环境、生物、考古等研究领域。配备有自动进样器，可以对从Li到U的多种同位素进行高精度、高效率测定。目前本室已经建立了Sr，Nd，U，Li，Si同位素的方法，随着研究的进一步深入，新的同位素方法将被陆续建立。与激光系统相联时，可以进行原位微区的高精度U-Pb定年分析和Hf同位素分析。
H-O同位素分析仪(LGR,型号TIWA-45EP)
氢氧同位素分析仪由美国LGR公司生产，主要用于液态和气态水中的δD, δ17O 和δ18O同位素分析。该设备采用先进的离轴积分腔输出光谱技术结合光腔衰荡技术来提高数据精密度和测样效率。每天可完成包括150个实际样品和30个标准样品的180个样品测试。LGR软件进行数据处理时，每个样品均使用3个标样来进行校正，δD, δ17O和δ18O的数据精度可分别达到0.5‰, 0.1‰, 0.1‰。
联系方式
联系人：徐娟 电话：021-20926972-1022 Email：juanxu@tongji.edu.cn
LA-MC-ICPMS Lab
Introduction
The LA-MC-ICPMS Laboratory was set up in 2016, and is opened mainly to academic users for the measurements of trace elements and various isotope ratios in diverse materials and fields.
The LA-MC-ICPMS Laboratory comprises a class 1000 temperature and humidity controlled clean room for instruments and a class 100-1000 clean room for chemical pretreatment.
Instruments
The laboratory comprises four major instruments: Inductively Coupled Plasma Mass Spectrometry(ICPMS), Laser ablation system (LA), Multi-Collector Inductively Coupled Plasma Mass Spectrometry (MC-ICPMS) and H-O isotopic analyzer.
ICPMS (Agilent, Model 7900)
The quadrupole ICPMS with collision cell uses innovative technology and a new MassHunter software. The matrix tolerance has been extended which can measure samples containing up to 25% TDS. The instrument boasts a linear dynamic range of up to 11 orders of magnitude (from sub-ppt to %-level concentrations), as well as the helium (hydrogen) collision mode are applied to minimize interferences. Itdelivers superior-quality data with minimal drift and high precision (RSD<5% at low ppb level). When connected with laser ablation system, it is capable of in-situ elements analysis and U-Pb dating.
Laser ablation system (ASI resolution, Model LR)
The ArF 193nm gas excimer laser is controlled with Geostar software and configured with squid coil to smooth out the signal on sample introduction line. It can be used for various in-situ elemental and isotopic analysis. Sample holders can be adapted to the thin section, 1 inch round shape and universal shape. Five different ablation modes are available including single spots, transects and mapping. Various standards are available including NIST standards, USGS and MPI-DING reference glasses.
MC-ICPMS (Thermo Fisher Scientific, Model NEPTUNE plus)
The Neptune plus is a double focus magnetic sector instrument that is fitted with 9 Faraday detector, 3 SEM and 4 CDD (Compact Discrete Dynamic SEM) to allow the vast majority of isotopes in the Periodic Table to be measured for Earth, environmental, biological, archaeological sciences and so on. An automatic sample introduction system allows for high precision and high throughput isotope analysis of many elements, from lithium to uranium. Analytical protocols for Sr, Nd, U, Li, Si isotopes are already set up, and protocols for other isotopes will be set up following research need. When connected to the laser system, it is capable of highly efficient in-situ U-Pb dating and Hf isotopes of zircon and other high U-Pb/Hf materials.
H-O isotopic analyzer(LGR, Model TIWA-45EP)
The Hydrogen and Oxygen Isotopic Analyzer designed by American Los Gatos Research Company (LGR) was developed for stable isotope analyses (i.e., δD, δ17O and δ18O) of liquid and vapor water by American Los Gatos Research Company (LGR). The advanced Off-axis integral cavity output spectroscopy coupled with optical cavity ring-down spectroscopy was used to improve the precision and efficiency. About 180 samples can be finished per day, including 150 unknown samples and 30 standard samples. Each test sample will be calibrated by three standards in the post analysis software provided by LGR, and the data (i.e., δD, δ17O and δ18O) can be attained with a typical precision of 0.5‰, 0.1‰, 0.1‰, respectively.
