??? 主要從事同位素地球化學方面的工作，利用熱電離質(zhì)譜儀（TIMS，Triton）和多接收電感耦合等離子質(zhì)譜儀（MC-ICP-MS，NEOMA）進行元素及同位素的分析檢測及應用研究，并開拓同位素測試的新方法和新技術(shù)，在我國硼、氯和溴同位素的測定及應用方面具有領(lǐng)先的地位。?
1.Xuehai Ma, Yunqi Ma, Jianguo Song, et al., Three-step Ion Exchange Method for High Precision Determination of Boron Isotope in Nitrate Brine Samples, Chinese Journal of Analytical Chemistry,2020,48(6):780-785.??
2.Jiang Yang, Yunqi Ma*, Xingyi Li, et al., Application of EDTA Salt to High Precision Measurement of Isotope of Boron in Acid soluble Fraction of Sediments, Chinese Journal of Analytical Chemistry,2019,47(9):1433-1439.??
3. Yunqi Ma, Zhangkuang Peng,Yanjiao Chen, et al., Determination of boron content and isotopic composition in Gypsum by ICP-OES and P-TIMS using phase transformation, Talanta, 2017,175，250-255. DOI：10.1016/j.talanta.2017.07.006 ??
4. Yunqi Ma, Zhangkuang Peng,Yanjiao Chen, et al., High Precise Determination of Bromine Isotopic Ratios by P-TIMS Using Static Multicollection Based on Cs2Br+ Ions, Chinese Journal of Analytical Chemistry,2016,44(2):186-191.??
5.Yunqi Ma, Yingkai- Xiao, Maoyong He, et al., Boron isotopic composition of aleozoic brachiopod and coeval coral calcites in Yunnan-Guizhou Plateau, China, Science in China (Series D:Earth Sciences),2011,54(12):1912-1925?
國家自然科學基金（項目批準號：41173019、41473117）；中國科學院大型儀器及設(shè)備功能開發(fā)項目(No.2020g102、2016g106)，中國科學院關(guān)鍵技術(shù)人才等項目。