Abstract: For the rapid detection of APEO in textile auxiliaries, methods for qualitative and quantitative of APEO by infrared spectra analysis were developed. Using a couple of characteristic absorption peak of 1608 ± 4cm-1, 1510 ± 3 cm-1 in the second derivative infrared spectrum, APEOs which were in different molecular structures forms in textile auxiliaries could be detected. The methods were simple and feasible, in which standard reagents of APEOs were not necessary and the different components in samples needn’t to be separated. Besides, applying the method of least squares in the quantitative software of TQ Analyst, and using the second derivative infrared spectrum and selecting peak range from 1529.27cm-1 to 1496.45cm-1, quantitative model for APEO was established. In this quantitative model, the regression coefficient R and RMSEC (Root Mean Square Error Contrast) were 0.99946 and 0.970 separately. The results of quantitative for APEO in textile auxiliaries showed that their absolute deviations were in range of -1.56~3.18% and the recovery rates of APEO were about 82~117% .

Key words: infrared spectrum, second derivative spectrum, APEO, characteristic absorption peak, textile auxiliaries