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Article

Nanostructured Silver Coating as a Stationary Phase for Capillary Gas Chromatography

by 1,*, 1, 2 and 2,*
1
College of Plant Protection, Gansu Agricultural University/Biocontrol Engineering Laboratory of Crop Diseases and Pests of Gansu Province, Lanzhou 730070, China
2
Key Laboratory of Interfacial Reaction & Sensing Analysis in Universities of Shandong, School of Chemistry and Chemical Engineering, University of Jinan, Jinan 250022, China
*
Authors to whom correspondence should be addressed.
Molecules 2019, 24(24), 4491; https://doi.org/10.3390/molecules24244491
Received: 27 September 2019 / Revised: 28 November 2019 / Accepted: 2 December 2019 / Published: 8 December 2019
(This article belongs to the Section Analytical Chemistry)
A capillary column coated with nanostructured silver coating was fabricated for gas chromatography. The nanostructured silver coating, about 80–120 nm in thickness, was prepared as the stationary phase via silver mirror reaction, and was characterized by SEM and EDS. The column was evaluated using different types of model analytes, including n-alkanes, n-alcohols, benzenes, and Grob mixture. A baseline separation of ten n-alkanes on the silver column (15 m × 0.20 mm i.d.) was achieved within 3.5 min through the main hydrophobic mechanism. A mixture of six n-alcohols, or another mixture containing three butanol isomers and two octanol isomers, was separated well on the column. The column separated some benzenes containing benzene, toluene, ethylbenzene, p-xylene, o-xylene, styrene, benzaldehyde, and benzyl alcohol. A Grob mixture containing seven analytes was also separated successfully. Based on a multiple retention mechanism such as hydrophobic, dipole-dipole, and dipole-induced dipole interactions, the silver column achieved a good separation of twelve different types of compounds within 2.5 min. The column presented satisfactory separation repeatability with relative standard deviation of retention time between 0.073% and 0.591%. The results indicate that the silver column is promising for gas chromatographic separation. View Full-Text
Keywords: silver coating; nanomaterial; capillary column; gas chromatography; organic compounds silver coating; nanomaterial; capillary column; gas chromatography; organic compounds
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MDPI and ACS Style

Jiang, Q.; Xu, P.; Feng, J.; Sun, M. Nanostructured Silver Coating as a Stationary Phase for Capillary Gas Chromatography. Molecules 2019, 24, 4491. https://doi.org/10.3390/molecules24244491

AMA Style

Jiang Q, Xu P, Feng J, Sun M. Nanostructured Silver Coating as a Stationary Phase for Capillary Gas Chromatography. Molecules. 2019; 24(24):4491. https://doi.org/10.3390/molecules24244491

Chicago/Turabian Style

Jiang, Qiong, Peng Xu, Juanjuan Feng, and Min Sun. 2019. "Nanostructured Silver Coating as a Stationary Phase for Capillary Gas Chromatography" Molecules 24, no. 24: 4491. https://doi.org/10.3390/molecules24244491

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