6850 ser 2 apparatus

Analyses were performed on an Agilent 6850 Ser. II apparatus (Santa Clara, CA, USA), fitted with a fused silica DB-5 capillary column (30 m × 0.25 mm i.d., 0.33 µm film thickness) (Santa Clara, CA, USA), coupled to an Agilent Mass Selective Detector MSD 5973; ionization energy voltage 70 eV; electron multiplier voltage energy 2000 V.
Mass spectra were scanned in the range 40–500 amu, scan time 5 scans/s. Gas chromatographic conditions were as reported above, and the transfer line temperature was 295 °C.
Most constituents were identified by gas chromatography by comparison of their Kovats retention indices (Ri) (determined relative to the tR of n-alkanes (C₁₀–C₃₅)), with either those of the literature [33 ,34 (link),35 ,36 (link)] and mass spectra on both columns with those of authentic compounds available in our laboratories by means of the National Institute of Standards and Technology (NIST) and Wiley 275 libraries [37 ]. The relative concentrations of the single components were obtained by peak area normalization.

Analysis was performed on an Agilent 6850 Ser. II apparatus (Agilent, Roma, Italy), fitted with a fused silica DB-5 capillary column (30 m × 0.25 mm i.d., 0.33 μm film thickness, Agilent, Roma, Italy), coupled to an Agilent Mass Selective Detector MSD 5973: ionization energy voltage 70 eV and electron multiplier voltage energy 2000 V. Mass spectra (MS) were scanned in the range 40–500 amu, scan time 5 scans/s. Gas chromatographic conditions were as reported in the previous paragraph with a transfer line temperature of 295 °C.

Analyses were performed on an Agilent 6850 Ser. II apparatus, fitted with a fused silica DB-5 capillary column (30 m × 0.25 mm i.d., 0.33 μm film thickness), coupled to an Agilent Mass Selective Detector MSD 5973, ionization energy voltage 70 eV, electron multiplier voltage energy 2000 V. Mass spectra were acquired in the range 40–500 amu, scan time 5 scans/s. Gas chromatographic conditions were as reported above, with a transfer line temperature of 295°C. Most constituents were identified by comparison of their Kovats retention indices (Ri) [calculated in relation to retention time of n-alkanes (C₁₀–C₃₅)], with either those of the literature (Jennings and Shibamoto, 1980 ; Davies, 1990 (link); Adams, 2007 ; Goodner, 2008 (link)), by accurate analysis of mass spectra on both columns and by their comparison with those of authentic compounds available in our laboratories by means of NIST 02 and Wiley 275 libraries (Wiley, 1998 ). The components’ relative concentrations were obtained by peak area normalization.