Determination of DMF and DMAC in Textiles by Gas Solid Headspace Combined with GC

Gas solid headspace combined with gas chromatography was applied for simultaneous determination of residual DMF and DMAC in textiles. After being cut to pieces, 0.5 g of sample was heated at the headspace temperature of 120 ℃ for 30 min. Then the headspace gas was separated with CAM column and detected with NPD. The matrix effect was eliminated by matrix-matching calibration. External standard method was used for quantification. Linear relationship between the peak area and the weight of DMF and DMAC was in the range of 0.2-400 μg, with detection limits (3S/N) of 0.1 μg·g-1. Recovery rates measured by standard addition method were in the range of 88.4%-95.3% with RSD′s (n=6) in the range of 2.4%-3.5%.