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Citation: ZHANG Han, WEI Lai, LIAO Xu, WANG Jia-Ni, SHI Qiu-Yue, ZHANG Xian. In Situ Carbon Stable Isotope Analysis of Organic Carbon by Laser Ablation-Isotope Ratio Mass Spectrometry[J]. Chinese Journal of Analytical Chemistry, ;2020, 48(6): 774-779. doi: 10.19756/j.issn.0253-3820.191769 shu

In Situ Carbon Stable Isotope Analysis of Organic Carbon by Laser Ablation-Isotope Ratio Mass Spectrometry

Key Laboratory of Urban Environment and Health, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen 361021, China

Received Date: 28 December 2019
Revised Date: 26 January 2020

Fund Project: This work was supported by the National Natural Science Foundation of China (No. 41977210).

An interface of laser ablation and stable isotope mass spectrometry was developed for micro region organic carbon stable isotope analysis. Based on this, the¹³C/¹²C analytical method for organic carbon in standards and rice leaf based on laser ablation-isotope ratio mass spectrometry (LA-IRMS) was described. The results showed that this device could be used for the continuous on-line analysis of solid samples with high sensitivity, and the sampling amount was as low as tens of nanograms, which was 10⁴ times lower than that of traditional EA-IRMS analysis. This method effectively avoided many fractionation factors in the process of sampling, transmission and ionization, and obtained repeatable and high-precision test results. Combined with the advantages of laser ablation technology in situ sampling, this technique could obtain high-resolution carbon isotope distribution information of solid samples. This in-situ and on-line solid organic carbon isotope measurement technique was stable, reliable and accurate, and had a huge application prospect in the fields of environment, agriculture, forestry and ecology in the future.
- Laser ablation,
- Organic carbon isotope composition,
- In situ carbon isotope analysis
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