农药学学报2016，Vol.18Issue(6)：772-777,6.DOI:10.16801/j.issn.1008-7303.2016.0109
2,2-双（对氯苯基）-1-氯乙烯稳定氯同位素组成测定的氧化脱氯前处理方法
Study on the oxidation dechlorination reaction for determination of chlorine isotopic composition of 1,1-dichloro-2,2-bis(4-chorophenyl)ethylene
摘要
Abstract
1,1-dichloro-2,2-bis(4-chorophenyl)ethylene (p,p’-DDE) is the primary metabolite of 1,1'-(2,2,2-trichloroethane-1,1-diyl)bis(4-chlorobenzene) which is a pesticide.p,p’-DDE was ubiquitous in the environment, and has significant interference effect on the male hormone receptor in the mammal. The chlorine isotopic composition (δ37Cl) ofp,p’-DDE can be used to study the fate of the compound in environment. In order to obtain the optimal reaction conditions, the CuO catalysed oxidative dechlorination reaction ofp,p’-DDE were conducted under vacuum, different temperatures (520-900℃) and time (0.5-1.0 h). Cl– formed in the reaction was determined by ion chromatography and theδ37Cl was determined by GasBench-IRMS. The experimental results showed there is a linear dependence betweenδ37Clproduct SOMC/‰ and yield of Cl– whenp,p’-DDE reacted with enough CuO at 520℃ to 720℃ under vacuum condition. The linear equation wasy=1.44x–4.41 with 0.96 forR2. Besides, the error value ofδ37Clproduct SOMC/‰ forp,p’-DDE was lower than ±0.15 ‰ when the reaction conditions were 720℃ and 1h. In conclusion, a more effective and accurate preparative method was developed for the determination ofδ37Clproduct SOMC/‰ of semi-volatility organo-chlorine compounds.关键词
2,2-双(对氯苯基)-1-氯乙烯/稳定氯同位素/氧化脱氯反应/含氯半挥发性有机物Key words
1,1-dichloro-2,2-bis(4-chorophenyl)ethylene/chlorine isotope composition/oxidation dechlorination/semi-volatility organo-chlorine compounds分类
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张亚男,田芹,宋淑玲..2,2-双（对氯苯基）-1-氯乙烯稳定氯同位素组成测定的氧化脱氯前处理方法[J].农药学学报,2016,18(6):772-777,6.基金项目
国家自然科学基金(41473008，21307018)；中国地质科学院院基金(YWF201402) （41473008，21307018）
