Determination of 3 Fluoroalkyl Acrylate Compounds in Coating by High Performance Liquid Chromatography
The 2.000 g of coating sample was taken,and 15 mL of acetonitrile was added.The mixture was vortexed for 30 s,and extracted by ultrasound at 30 ℃ for 40 min.After cooling to room temperature,the extract was made its volume up to 20 mL with acetonitrile.An aliquot(1 mL)was taken,and passed through a 0.22 μm filter membrane,and the filtrate was introduced into a high performance liquid chromatograph.Three fluoroalkyl acrylate compounds(FTAs),including 1H,1H,2H,2H-perfluorodecyl acrylate(8∶2 FTA),1H,1H,2H,2H-perfluorododecyl acrylate(10∶2 FTA),and 1H,1H,2H,2H-perfluorooctyl acrylate(6∶2 FTA)were separated on a ZORBAX SB-Aq column by gradient elution with a mixture of acetonitrile and water at different volume ratios,with external standard method for quantification.It was shown that linear relationships between values of mass concentration and peak area of the 3 FTAs were kept in the range of 0.2-5.0 mg·L-1,and the detection limits(3S/N)were found in the range of 0.27-0.34 mg·kg.Test for recovery was made according to the standard addition method,giving recoveries in the range of 93.5％-109％,with RSDs(n=6)of the determined values ranged from 0.50％to 4.7％.The proposed method was used for the analysis of 10 types of coating samples,and 8∶2 FTA was detected in two types of samples,with detection amounts of 226.7 mg·kg-1 and 4.1 mg·kg-1,respectively.
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