测试对象：锆石、斜锆石、磷灰石、独居石、榍石、黑钨矿、白钨矿、钛铀矿、锡石、刚玉、橄榄石、辉石、石榴石、长石、角闪石、云母、绿松石、磁铁矿、黄铁矿以及有孔虫、贝壳等碳酸盐和磷酸盐类等矿物质

测试周期：提前2-4周预约，5-10个工作日可完成测试。黄铁矿等特殊矿物集中机时测试，请提前1个月预约，10-20个工作日可完成测试。可提供测试加急服务。

送样要求：1、样品长度不超过5cm，宽度不超过3cm，厚度不超过0.8cm；2、需测试单矿物可以选择24μm、32μm、44μm三种不同束斑；3、为保证单矿物不被打穿，片子不宜过薄，常规测试剥蚀深度在5-20μm之间。

完成标准：仪器状态良好，监控标样测试值在国际推荐值误差范围内。



方法描述：

16.1单矿物LA-ICP-MS微区原位微量元素分析

16.2 In-situ trace element analysis of minerals by LA-ICP-MS

Trace element analysis of minerals was conducted by LA-ICP-MS at the Wuhan SampleSolution Analytical Technology Co., Ltd., Wuhan, China. Detailed operating conditions for the laser ablation system and the ICP-MS instrument and data reduction are the same as description by Zong et al. (2017). Laser sampling was performed using a GeolasPro laser ablation system that consists of a COMPexPro 102 ArF excimer laser (wavelength of 193 nm and maximum energy of 200 mJ) and a MicroLas optical system. An Agilent 7700e ICP-MS instrument was used to acquire ion-signal intensities. Helium was applied as a carrier gas. Argon was used as the make-up gas and mixed with the carrier gas via a T-connector before entering the ICP. A “wire” signal smoothing device is included in this laser ablation system (Hu et al., 2015). The spot size and frequency of the laser were set to ××µm and ××Hz, respectively, in this study. Trace element compositions of minerals were calibrated against various reference materials (BHVO-2G, BCR-2G and BIR-1G) without using an internal standard (Liu et al., 2008). Each analysis incorporated a background acquisition of approximately 20-30 s followed by 50 s of data acquisition from the sample. An Excel-based software ICPMSDataCal was used to perform off-line selection and integration of background and analyzed signals, time-drift correction and quantitative calibration for trace element analysis (Liu et al., 2008).
References
Zong, K.Q., Klemd, R., Yuan, Y., He, Z.Y., Guo, J.L., Shi, X.L., Liu, Y.S., Hu, Z.C., Zhang, Z.M., 2017. The assembly of Rodinia: The correlation of early Neoproterozoic (ca. 900 Ma) high-grade metamorphism and continental arc formation in the southern Beishan Orogen, southern Central Asian Orogenic Belt (CAOB). Precambrian Research, 290, 32–48.
Hu, Z.C., Zhang, W., Liu, Y.S., Gao, S., Li, M., Zong, K.Q., Chen, H.H., Hu, S.H., 2015. “Wave” Signal-Smoothing and Mercury-Removing Device for Laser Ablation Quadrupole and Multiple Collector ICPMS Analysis: Application to Lead Isotope Analysis. Analytical Chemistry, 87(2), 1152–1157.
Liu, Y.S., Hu, Z.C., Gao, S., Günther, D., Xu, J., Gao, C.G. and Chen, H.H., 2008. In situ analysis of major and trace elements of anhydrous minerals by LA-ICP-MS without applying an internal standard. Chemical Geology, 257(1-2): 34-43.