Fingerprint patterns of SCCP and MCCP homologues in chlorinated paraffin products
ZHANG Yu1, XU Peng-jun2,3, ZHAO Hu2, GAO Yuan3, YANG Wen-long2, ZHANG Li-fei2, LIU Ai-min2, HUANG Ye-ru2, LI Xiao-xiu1
1. College of Resource Environment and Tourism, Capital Normal University, Beijing 100048, China; 2. National Research Center for Environmental Analysis and Measurement, Beijing 100029, China; 3. Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China
Abstract：Twenty-two CP products with three chlorine contents (CP-42, CP-52, and CP-70) were determined using gas chromatography coupled with electron capture negative ionization mass spectrometry (GC-ECNI-MS), and the distribution patterns of short chain chlorinated paraffin (SCCP) and medium chain chlorinated paraffin (MCCP) homologues were explored. Five classes of distribution patterns, namely, CP-42 type, three CP-52 types, and CP-70 type were found for SCCP homologues. And four classes of distribution patterns, namely, CP-42 type and three CP-52 types were found for MCCP homologues. MCCP homologues in CP-70 products did not show consistent pattern. The reason for distinct homologue patterns in CP products could be attributed to different composition of alkane in paraffin (raw material) and production process. The fingerprint patterns of SCCP and MCCP homologues in CP products were characterized via statistical analysis, which can be useful tools for studies of source identification, migration and transformation, fate, toxicity risk assessment of CPs in the environment.
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