TY - JOUR

T1 - Analysis of Residual Hydrocarbons and Methanol in n-Butane on a Porous-Layer Capillary Column with Poly(1-Trimethylsilyl-1-Propyne)

AU - Yakovleva, E. Yu

AU - Patrushev, Y. V.

N1 - Funding Information: This work was carried out with financial support from the Ministry of Science and Higher Education of the Russian Federation within the State Assignment for BIC SB RAS (project nos. AAAA-A21-121011390007-7 and AAAA-A21-121011390053-4). Publisher Copyright: © 2022, Pleiades Publishing, Ltd.

PY - 2022/1

Y1 - 2022/1

N2 - This study investigated the separation selectivity for C1–C10 aromatic and aliphatic hydrocarbons (both saturated and unsaturated) and methanol contained as contaminants in n-butane (>99% pure). It was shown that a 30 m × 0.32 mm porous-layer capillary column with a 1.55 μm poly(1-trimethylsilyl-1-propyne) film (PTMSP032) provides a significantly higher peak resolution for C1–C2 hydrocarbons and structural isomers (o-, m-, and p-) of xylene, than a commercial 30 m × 0.32 mm column with a 10 μm polydivinylbenzene layer (Rt-Q-BOND). A PTMSP032-based GC method was developed, which avoids the need for an extra sample-preparation step and assures the rapid and accurate identification of hydrocarbon and methanol impurities in an n-butane gas sample. The FID detection limit was evaluated to range from 3.21 × 10–12 to 6.68 × 10–12 g/s for hydrocarbons and to be 2.78×10–11 g/s for methanol. The repeatability, determined as the root-mean-square deviation (RMSD) of peak area, amounted to 4.20% for hydrocarbons, and varied from 4.96 to 0.29% for methanol in concentrations of 0.06×10–3 to 1.01×10–2 mg/mL, respectively.

AB - This study investigated the separation selectivity for C1–C10 aromatic and aliphatic hydrocarbons (both saturated and unsaturated) and methanol contained as contaminants in n-butane (>99% pure). It was shown that a 30 m × 0.32 mm porous-layer capillary column with a 1.55 μm poly(1-trimethylsilyl-1-propyne) film (PTMSP032) provides a significantly higher peak resolution for C1–C2 hydrocarbons and structural isomers (o-, m-, and p-) of xylene, than a commercial 30 m × 0.32 mm column with a 10 μm polydivinylbenzene layer (Rt-Q-BOND). A PTMSP032-based GC method was developed, which avoids the need for an extra sample-preparation step and assures the rapid and accurate identification of hydrocarbon and methanol impurities in an n-butane gas sample. The FID detection limit was evaluated to range from 3.21 × 10–12 to 6.68 × 10–12 g/s for hydrocarbons and to be 2.78×10–11 g/s for methanol. The repeatability, determined as the root-mean-square deviation (RMSD) of peak area, amounted to 4.20% for hydrocarbons, and varied from 4.96 to 0.29% for methanol in concentrations of 0.06×10–3 to 1.01×10–2 mg/mL, respectively.

KW - detection limit

KW - poly(1-trimethylsilyl-1-propyne)

KW - repeatability

KW - residual hydrocarbons and methanol in n-butane

UR - http://www.scopus.com/inward/record.url?scp=85123060341&partnerID=8YFLogxK

UR - https://www.mendeley.com/catalogue/f38c1399-9211-363a-845f-d43953bf84da/

U2 - 10.1134/S0965544122010029

DO - 10.1134/S0965544122010029

M3 - Article

AN - SCOPUS:85123060341

VL - 62

SP - 112

EP - 120

JO - Petroleum Chemistry

JF - Petroleum Chemistry

SN - 0965-5441

IS - 1

ER -