A Statistical Estimation Approach for Quantitative Concentrations of Compounds Lacking Authentic Standards/Surrogates Based on Linear Correlations between Directly Measured Detector Responses and Carbon Number of Different Functional Groups
Table 3
Operational conditions of the TD-GC-MS system for the analysis of reference VOCs in this study.
(A) GC (Shimadzu GC-2010, Japan) and MS (Shimadzu GCMS-QP2010, Japan)
Column: CP Wax (diameter: 0.25 mm, length: 60 m, and film thickness: 0.25 μm)
Oven setting
Detector setting
Oven temp.
35°C (10 min)
Ionization mode
EI (70 eV)
Oven rate
6°C min−1
Ion source temp.
200°C
Max oven temp.
215°C (10 min)
Interface temp.
200°C
Total time
50 min
TIC scan range
35~260 m z−1
Carrier gas
He (99.999%)
Carrier gas flow
1 mL min−1
(B) Thermal desorber (Unity, Markes, UK)
Cold trap sorbent
Carbopack C + Carbopack B (volume ratio = 1 : 1)
Split ratio
1 : 5
Adsorption temp.
−10°C
Split flow
5 mL min−1
Desorption temp.
320°C
Trap hold time
20 min
Flow path temp.
150°C
(C) Sorbent (sampling) Tube
Sorbent material
Tenax TA + Carbopack B + Carboxen 1000 (mass (mg) = 100 : 100 : 100 )
