当前位置: X-MOL 学术Talanta › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
A novel charge derivatization-direct infusion mass spectrometry method for the quantitative analysis of C1–C8 fatty acids in rubber seed oil-based biodiesel
Talanta ( IF 6.1 ) Pub Date : 2021-01-16 , DOI: 10.1016/j.talanta.2021.122107
Hua-Ming Xiao , Yan Shi , Yong-Xue Yang , Shuai Zhao , Xian Wang

The free fatty acids that contain one to eight carbons (C1–C8) in biodiesel would affect the quality of biodiesel. It is still a matter of challenge to simultaneously determine the composition of C1–C8 fatty acids in seed oil and seed oil-based biodiesel. Herein, a novel method of charge derivatization coupling with direct infusion mass spectrometry (CD-DIMS) was developed for the determination of the C1–C8 fatty acids in biodiesels. A fixed-charge derivatization reagent, 1-cyclohexyl-3-(2-morpholinoethyl)carbodiimide (CMCT), was used to convert fatty acids into their cationic derivatives, which significantly improved the sensitivity and selectivity of detection. Good linearity was observed with the limits of detection (LODs) in the range of 0.0002–0.001 μg mL−1 for the investigated fatty acids. The recovery was in the range of 85.1%–101.9% and the matrix effect was within the range of 75.5–93.2%. The developed method was carried out to analyze C1–C8 fatty acids in rubber seed oil (RSO) and RSO-based biodiesels produced by different catalysts, including NaOH, TiO2, and carbodiimide. It was also applied to the dynamic monitoring of C1–C8 fatty acids in RSO and produced RSO biodiesels during the oxidation process. As results, formic acid, acetic acid, and propionic acid were detected in aged RSO and biodiesel samples. The contents of formic acid, acetic acid, and propionic acid all increased in aged RSO and biodiesels, but with different growth rates. These results demonstrated that the developed CD-DIMS method can provide a quick, accurate, and sensitive analysis of C1–C8 fatty acids in seed oil and biodiesel samples.



中文翻译:

一种新型的电荷衍生化直接注入质谱法,用于橡胶籽油基生物柴油中C 1 -C 8脂肪酸的定量分析

生物柴油中含有1至8个碳原子(C 1 –C 8)的游离脂肪酸会影响生物柴油的质量。同时确定种子油和基于种子油的生物柴油中C 1 – C 8脂肪酸的组成仍然是一个挑战。在此,开发了一种新的电荷衍生化与直接注入质谱(CD-DIMS)耦合的新方法,用于测定C 1 –C 8生物柴油中的脂肪酸。使用固定电荷衍生化试剂1-环己基-3-(2-吗啉代乙基)碳二亚胺(CMCT)将脂肪酸转化为其阳离子衍生物,从而显着提高了检测的灵敏度和选择性。对于所研究的脂肪酸,检测限(LOD)在0.0002–0.001μgmL -1范围内,观察到良好的线性。回收率在85.1%–101.9%的范围内,基质效应在75.5–93.2%的范围内。进行了开发的方法来分析由不同催化剂(包括NaOH,TiO 2和碳二亚胺)生产的橡胶籽油(RSO)和RSO基生物柴油中的C 1 -C 8脂肪酸。它也被应用于C的动态监视RSO和氧化过程中产生的RSO生物柴油中的1 – C 8脂肪酸。结果,在老化的RSO和生物柴油样品中检测到了甲酸,乙酸和丙酸。老化的RSO和生物柴油中甲酸,乙酸和丙酸的含量均增加,但增长率不同。这些结果表明,开发的CD-DIMS方法可以对种子油和生物柴油样品中的C 1 -C 8脂肪酸进行快速,准确和灵敏的分析。

更新日期:2021-01-18
down
wechat
bug