TY - JOUR

T1 - Analytical Characteristics of Multicapillary Gas Chromatographic Columns with 25 µm Capillaries

AU - Naumenko, I. I.

AU - Efimenko, A. P.

AU - Gruznov, V. M.

N1 - Funding Information: This work was supported by the Comprehensive Program for Fundamental Research of the Siberian Branch of the Russian Academy of Sciences (project nos. 0385-2018-0014, 0331-2019-0029, and 0331-2018-0009). Publisher Copyright: © 2022, Pleiades Publishing, Ltd.

PY - 2022/12

Y1 - 2022/12

N2 - Straight multicapillary columns (MCCs) with 40 µm capillaries are used in portable gas analyzers. In order to increase the efficiency and speed of gas chromatographic separation, straight MCCs with a diameter of 25 μm and a length of 200–250 mm with an OV-5 stationary phase (film thickness, 0.1–0.2 μm) were fabricated and their main chromatographic characteristics were determined. It was shown that the maximum specific efficiency of the MCCs was 25 600 theoretical plates/m and the separation rate reached 630 theoretical plates/s, which significantly exceed the corresponding values for 40 μm MCCs. The test MCCs retained high separation efficiency in wide ranges of carrier gas flow rates: 30–170 cm3/min for argon and nitrogen and 120–420 cm3/min for helium. However, as compared to the 40 µm columns, approximately twice the pressure was required to ensure the same flow of a carrier gas through the 25 µm MCCs. A decrease in the diameter of MCC channels from 40 to 25 µm made it possible to shorten the column length by about 1/3 with the retention of the column efficiency.

AB - Straight multicapillary columns (MCCs) with 40 µm capillaries are used in portable gas analyzers. In order to increase the efficiency and speed of gas chromatographic separation, straight MCCs with a diameter of 25 μm and a length of 200–250 mm with an OV-5 stationary phase (film thickness, 0.1–0.2 μm) were fabricated and their main chromatographic characteristics were determined. It was shown that the maximum specific efficiency of the MCCs was 25 600 theoretical plates/m and the separation rate reached 630 theoretical plates/s, which significantly exceed the corresponding values for 40 μm MCCs. The test MCCs retained high separation efficiency in wide ranges of carrier gas flow rates: 30–170 cm3/min for argon and nitrogen and 120–420 cm3/min for helium. However, as compared to the 40 µm columns, approximately twice the pressure was required to ensure the same flow of a carrier gas through the 25 µm MCCs. A decrease in the diameter of MCC channels from 40 to 25 µm made it possible to shorten the column length by about 1/3 with the retention of the column efficiency.

KW - 25 µm multicapillary columns

KW - carrier gas flow rate

KW - carrier gas pressure

KW - column efficiency

UR - http://www.scopus.com/inward/record.url?scp=85142661905&partnerID=8YFLogxK

UR - https://www.mendeley.com/catalogue/f2f671a5-072f-3593-a2a7-92c2966d1a28/

U2 - 10.1134/S1061934822120097

DO - 10.1134/S1061934822120097

M3 - Article

AN - SCOPUS:85142661905

VL - 77

SP - 1570

EP - 1576

JO - Journal of Analytical Chemistry

JF - Journal of Analytical Chemistry

SN - 1061-9348

IS - 12

ER -