AnYiPu 7700 Single Quadrupole GC-MS for Determination of Semi-Volatile Organic Compounds in Soil and Sediment
Reference "HJ 834-2017 Determination of Semi-Volatile Organic Compounds in Soil and Sediment by Gas Chromatography-Mass Spectrometry." Volatile organic compound (VOC) mixed standards were analyzed using a gas chromatography-mass spectrometer (GC-MS). VOCs were qualitatively identified based on retention time, mass spectra, and characteristic ion pairs, and quantitatively determined using the external standard method.
Experimental Conditions
Injection mode: Splitless;
Injection volume: 1.0μL;
Injection port: 280°C;
Column: Agilent HP-5MS 30m × 0.25mm × 0.25µm, Constant Flow Mode | Column Flow Rate:
1mL/min
Column oven temperature program: 35°C (2 min) → 15°C/min → 150°C (5 min) → 3°C/min → 90°C (2 min)
Ion source: 280°C; Transfer line: 280°C;
Solvent delay: 3 min;
Scan Mode: Full Scan (SCAN) and Selected Ion Monitoring (SIM); SCAN mode scan range: 35~450 amu.
Experimental Results
Analyze samples from low to high concentration according to instrument analysis conditions. The semi-volatile organic compound concentration points are 1.
mg/L, 5 mg/L, 10 mg/L, 20 mg/L, 50mg/L. Target analyte concentration on the x-axis; target analyte response value (peak
Area) as the y-axis, fit a calibration curve using the least squares method. The correlation coefficients of all curves exceed 0.99.
The linear correlation coefficients (r) for semi-volatile organic compounds were all greater than 0.99, and the relative standard deviations for repeated injections ranged from 2.3% to 10.6%.
Linearity, precision, and other parameters meet or exceed the requirements of this national standard.