Determination of Short Chain Chlorinated Paraffins in Textile Samples by GC-MS

The method of determining short-chain chlorinated paraffins in textiles by GC-MS was established. Short-chain chlorinated paraffins, short for SCCPs, are a mixture of polychlorinated n-alkanes. These high production volume chemicals are widely used as leather coating, plasticizers for PVC and chlorinated rubber and flame retardants for plastics and textile. Due to their toxicity, as well as capacity for bioaccumulation and persistence in the environmental residue, SCCPs have become an obviously environmental issue. The current analytical equipment combination are very expensive and require a lot of laboratory space and advanced skills for operation, a ready-to-use commercially available method with relatively short time and satisfactory sensitivity urge to be established. In this new method, samples were extracted by n-hexane under ultrasonic followed by concentration and constant-volume and then identified by GC-MS and quantified by external standard method. With this method, a good linear relationship was found between 5 μg/mL ~30μg/mL with a linear correlation coefficient (R2) above 0.995. The detection limit for SCCPs by this method was found to be as low as 10mg/kg. The recoveries of SCCPs in textiles at three levels which covers low, media and high concentration ranges are ranged from 82.3% to 106.9% with relative standard deviation (RSD) of 3.41%~7.61%(RSD, N = 6).