Citation: XING Yuanna, LIN Zhihui, FENG Anhong, WANG Xin, GONG Yemeng, CHEN Zeyong. Determination of short chain chlorinated paraffins in polyvinyl chloride plastics by gas chromatography- negative chemical ion/mass spectrometry[J]. Chinese Journal of Chromatography, ;2015, 33(2): 182-187. doi: 10.3724/SP.J.1123.2014.10004 shu

Determination of short chain chlorinated paraffins in polyvinyl chloride plastics by gas chromatography- negative chemical ion/mass spectrometry

1.
Shenzhen Academy of Metrology and Quality Inspection, Shenzhen 518131, China

Corresponding author: XING Yuanna,
Received Date: 11 October 2014
Available Online: 20 November 2014
Fund Project: 广东省质量技术监督局科技项目(2013PZ09). (2013PZ09)

A novel method was established to determine short chain chlorinated paraffins (SCCPs) in polyvinyl chloride (PVC) plastics by gas chromatography-negative chemical ion/mass spectrometry (GC-NCI/MS). Ultrasonic extraction was used to extract SCCPs from PVC plastics. The optimal extraction time was 1.5 h, and concentrated sulfuric acid was adopted to purify the extracted solution. Finally, SCCPs in a sample were detected by GC-NCI/MS at 160 ℃ and with methane reagent gas at 1.5 mL/min. This method was not influenced by medium chain chlorinated paraffins (MCCPs) in the sample, and accurate quantitation was made for SCCPs. Twelve batches of samples were analyzed and SCCPs were detected in each batch with the contents from 0.3×10² mg/kg to 3.5×10⁴ mg/kg. With respect to European limitation of SCCPs (1%), four batches of samples did not comply with the European regulation, and they accounted for 33.3%. Obviously, high SCCPs risk was presented in PVC plastics.
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沈阳化工大学材料科学与工程学院沈阳 110142