Analytical Procedure
Laboratory analytical procedures specify the determination of volatile organic compounds in indoor air and test chamber atmospheres using active sampling onto sorbent tubes followed by gas chromatography. Under ISO 16000-6 emission testing, air samples drawn from textile test chambers pass through Tenax TA sorbent beds to capture organic vapors emitted by fabrics or synthetic coatings. Sorbent tubes retain volatile compounds ranging from hexane to hexadecane for qualitative and quantitative analysis.
Thermal Desorption
Thermal desorption units heat loaded sorbent tubes to release trapped organic compounds directly into gas chromatographs equipped with mass spectrometers or flame ionization detectors. Compound identification relies on comparing retention times and mass spectra against certified chemical reference libraries. Quantification measures target individual volatile organic compounds alongside total volatile organic compound concentrations expressed in micrograms per cubic meter.
Precision calibrations prevent sample loss or thermal degradation during heat-assisted gas transfer.
Sampling Rigor
Sorbent sampling rates and volumes must be controlled to prevent breakthrough, where volatile compounds pass through sorbent beds uncaptured. Duplicate tube sampling ensures analytical repeatability across test batches. Field blanks evaluate potential contamination introduced during sample handling or storage.
Procedural Scope
Test methods apply specifically to volatile organic compounds collected on sorbent media from gaseous phases. Semi-volatile compounds requiring liquid extraction or non-volatile chemical residues in solid fabric matrixes rely on distinct chemical analysis standards.
