Table 4

Equipment specifications for VOCs and HCHO analyses

Volatile organic compounds (VOCs)
CategoryDescriptionAnalysis conditions
ATDDesorb flow/Outlet/Inlet40 ml/18 ml/0 ml
Head Pressure/Split Ratio13.0 psi/10:1
Desorption1st (10 min), 2nd (5 min)
Tube/Trap/Valve/Transfer Temp300 °C/−30 to 300 °C/175 °C/220 °C
GC/MSManufacturerAgilent 8890 GC
Temperature program35 °C > 5 °C/min > 220 °C (10 min) > 10 °C/min
>250 °C (6 min)
DetectorMS
ColumnHP-1 (0.32 mm × 60 m × 1.80 µm)
Carrier, flowHe (99.999%), 2 ml/min
Detection energyTIC (Scan), m/z: 35–350
Electronic energy70 ev
ModeEI/Scan
HCHO
HPLC (UV, 360 nm)ColumnEclipse XDB-C18 5um, 4.6 × 150 mm
Mobile phaseACN/Water (50/50 V/V)
Analysis time30 min
Injection volume10 μl
Column temperature25 °C
Flow rate1.0 ml/min

Source(s): Created by author

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