High-resolution separation performance of poly(caprolactone)diol for challenging isomers of xylenes, phenols and anilines by capillary gas chromatography.
Efficient separation of xylenes, phenols and anilines is a big issue in chemical and petroleum industries. This work presents the first example of employing poly (caprolactone) diol (PCL-Diol) as stationary phase for high-resolution gas chromatographic (GC) separations of these tough isomer mixtures. It showed medium polarity and stronger H-bonding basicity than H-bonding acidity. Impressively, PCL-Diol column exhibited extremely high resolving capability for the isomer mixtures of xylenes, cresols/xylenols, and toluidines/xylidines with good peak shapes. Moreover, it exhibited preferential retention for analytes of a linear alkyl chain, suggesting its shape fitting selectivity for specific analytes. In addition, its separation performance has good repeatability with RSD values on retention times below 0.01% for run to run (n=6), 0.67-0.80% for day to day (n=4) and 3.2-4.4% for column to column (n=4) repeatability, respectively. Furthermore, it was applied for the determination of isomer impurities in real samples, showing good potential for practical use. This work demonstrates the advantageous high-resolution separation performance for challenging isomers and shows its promising future of PCL-Diol-based materials in separation science.
Key Laboratory of Cluster Science, Ministry of Education of China, Beijing Key Laboratory of Photoelectronic/Electrophotonic Conversion Materials and School of Chemistry and Chemical Engineering, Beijing Institute of Technology, Beijing, 100081, China.
Jianlin
J
Peng
Key Laboratory of Cluster Science, Ministry of Education of China, Beijing Key Laboratory of Photoelectronic/Electrophotonic Conversion Materials and School of Chemistry and Chemical Engineering, Beijing Institute of Technology, Beijing, 100081, China.
Yan
Y
Zhang
Key Laboratory of Cluster Science, Ministry of Education of China, Beijing Key Laboratory of Photoelectronic/Electrophotonic Conversion Materials and School of Chemistry and Chemical Engineering, Beijing Institute of Technology, Beijing, 100081, China.
Xiaohong
X
Yang
Key Laboratory of Cluster Science, Ministry of Education of China, Beijing Key Laboratory of Photoelectronic/Electrophotonic Conversion Materials and School of Chemistry and Chemical Engineering, Beijing Institute of Technology, Beijing, 100081, China. Electronic address: mlqi@bit.edu.cn.
Meiling
M
Qi
D000814:Aniline Compounds / Q000032:analysis*; D002208:Caproates / Q000737:chemistry*; D002623:Chemistry Techniques, Analytical / Q000295:instrumentation* / Q000379:methods*; D002849:Chromatography, Gas / Q000295:instrumentation*; D007536:Isomerism; D007783:Lactones / Q000737:chemistry*; D010636:Phenols / Q000032:analysis*; D014992:Xylenes / Q000032:analysis*
D000814:Aniline Compounds; D002208:Caproates; D007783:Lactones; D010636:Phenols; D014992:Xylenes; C121056:caprolactone
Capillary gas chromatography; Poly(caprolactone)diol; Positional isomers; Selectivity; Stationary phase