Citation: TANG Suo-Han, LI Jin, MA Jian-Xiong, ZHAO Xin-Miao, ZHU Xiang-Kun. Titanium Separation and Titanium Isotope Determination by Double-Spike Multicollector-Inductively Coupled Plasma-Mass Spectrometry[J]. Chinese Journal of Analytical Chemistry, ;2018, 46(10): 1618-1627. doi: 10.11895/j.issn.0253-3820.181431 shu

Titanium Separation and Titanium Isotope Determination by Double-Spike Multicollector-Inductively Coupled Plasma-Mass Spectrometry

TANG Suo-Han ^1,2, ,
LI Jin ^1,2 ,
MA Jian-Xiong ^1,2 ,
ZHAO Xin-Miao ³ ,
ZHU Xiang-Kun ^1,2

1.
Key Laboratory of Deep-Earth Dynamics of Ministry of Natural Resources, Institute of Geology, Chinese Academy of Geological Sciences, Beijing 100037, China;
2.
MNR Key Laboratory of Isotope Geology, Institute of Geology, Chinese Academy of Geological Sciences, Beijing 100037, China;
3.
State Key Laboratory of Lithospheric Evolution, Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing 100029, China

Received Date: 29 June 2018
Revised Date: 15 August 2018

Fund Project: This work was supported by the National Natural Science Foundation of China (No. 41473005)

A method for high-precision isotope measurement of Ti using multi-collector inductively coupled plasma-mass spectrometry (MC-ICP-MS) was developed. Ti separation for isotope measurement was achieved by ion exchange chromatography using Bio-Rad AG^® 1-X8 anion exchange resin and DGA resin. For the basalt samples, two-column chemistry procedure was used. To get rid of large amounts of Fe and Mg in the peridotite samples, a three-column chemistry procedure was needed. The instrumental mass bias was corrected using ⁴⁷Ti-⁴⁹Ti Double Spiking and the Ti isotopes were relative to SRM 3162a. Alfa Ti (Ti standard solutions in house) was measured during three measurement sessions over 10 months with a reproducibility of 0.08‰ (in terms of δ^49/46Ti, 2 sd), which was better than that of Standard-Sample Bracketing.
- Titanium isotopes,
- Separation chemistry,
- Double-spike,
- Multi-collector inductively coupled plasma-mass spectrometry
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