2.2.1 GC-MS analysis
Shimadzu QP 2010/Plus GC-MS were conducted on the composition analysis
of BWCO and DDCL on the basis of the MS data to the NIST library. The GC
operating conditions are as follows: RXi-5Sil MS (30 m × 0.25 mm × 0.25
μm); capillary column temperature of BWCO was first increased by 5
°C/min from 80 to 160 °C, followed by 3 °C/min from 160 to 240 °C;
capillary column temperature of DDCL was first increased by 0.5 °C/min
from 50 to 70 °C, and followed by 5 °C/min from 70 to 250 °C; interface
temperature of BWCO and DDCL were set to be 300 and 270 °C,
respectively; injection temperatures and volume were 270 °C and 1.0 μL;
and the gas flow rates (99.9% helium) were 1.0 mL/min. The GC-MS
analysis results of BWCO and DDCL are presented in Table 1 and Table 2,
respectively.
Figure 1. Total ion chromatograms of BWCO.
Table 1 Compositions of BWCO.