Abstract:

Based on gas chromatography⁃tandem mass spectrometry （GC⁃MS/MS）， a detection method for 14 types of organic phosphate flame retardants in polyurethane foams was established through adopting ultrasonic extraction and concentration with acetone， filtering with a constant volume， determining with gas chromatography⁃tandem mass spectrometry， and quantifying with an external standard method. Through parameter optimization， the experimental results indicated that there was a good linear relationship at gradient concentrations of tris（2⁃chloroethyl） phosphate （TCEP） and Tri⁃m⁃cresylphosphate （TMCP） in the range of 0.02~0.2 mg/L， a gradient concentration of tris（2⁃butoxyethyl） phosphate （TBEP） in the range of 0.05~0.5 mg/L， and gradient concentrations of the remaining 11 organic phosphates in the range of 0.01~0.1 mg/L with a linear correlation coefficient greater than 0.995. In this case， the quantification limit of TCEP and TMCP was 0.33 mg/kg， and their limit of detection was 0.10 mg/kg. The quantification limit of TBEP was 0.83 mg/kg， and its limit of detection was 0.25 mg/kg. The quantification limit of the ester was 0.17 mg/kg， and its limit detection was 0.05 mg/kg. The recoveries of three gradient spiked parallel experiments ranged from 87.0 % to 108.1 %， and their relative standard deviations ranged from 2.5 % to 10.6 %.

Key words: polyurethane foam, organophosphate flame retardant, ultrasonic extraction, gas chromatography?tandem mass spectrometry