Determination of Phthalic Acid Esters in the Inner Boxes of Self-Heating Hot Pots by GC-MS
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Abstract:
To investigate the migration of phthalic acid ester (PAE) plasticizers in the inner boxes of self-heating hot pots on the market under heating conditions, a gas chromatography-mass spectrometer (GC-MS) was used to establish the method for detecting 18 types of PAE plasticizers, and the migration amounts of PAEs in 182 self-heating hot pot inner boxes made of four different materials were tested. Based on establishing the PAE determination method with standard PAE samples, the inner boxes of self-heating hot pot packages were pre-treated with reference to the related national standard of China,, and then, the content of PAEs was detected. The results showed that when using the HP-5MS quartz capillary column as the separation column, the 18 types of PAEs were separated effectively. The detection limits were 0.005~0.02 μg/mL, the linear range was 0.05~5.14 μg/mL, the correlation coefficients (R) were all greater than 0.999, the relative standard deviations were less than 10%, and the recovery rates were 92.0%~99.6%. No PAEs were detected in any of the 182 self-heating hot pot inner boxes. In summary, the established GC-MS method for PAE determination can be characterized by its simplicity, high efficiency, strong practicality, low detection limit, high precision, and high recovery rate. It is suitable for the rapid detection of PAEs in the inner boxes of self-heating hot pots.
