壬基酚聚氧乙烯醚及其降解产物壬基酚在香蕉和土壤中的消解动态及风险评估

Residue decline study and risk assessment of nonylphenol ethoxylates and its metabolites nonylphenol in banana and soil

摘要: 为评价农药助剂壬基酚聚氧乙烯醚(NPnEO)在香蕉上使用的安全性,于2009-2010年在海南采用田间试验和超高效液相色谱-荧光分析方法研究了NPnEO及其降解产物壬基酚(NP)在香蕉及土壤中的消解动态和最终残留。结果表明:NPnEO在香蕉及土壤中的消解规律符合一级动力学模型,其半衰期分别为8.8~12 d和6.9~8.5 d,而其降解产物NP在香蕉和土壤中的半衰期分别为16~18 d和24~26 d。在香蕉收获期,NPnEO及NP在香蕉中的残留量均低于0.01 mg/kg。通过计算得出每人每天从香蕉中所摄入的NP仅为0.09 μg,风险商值(RQ)为0.003,处于安全水平。

Abstract: Aimed to evaluate the safety and regular use of nonylphenol ethoxylates(NPnEO),residue decline study of NPnEO and its metabolites nonylphenol (NP)in banana and soil were investigated and the samples were analyzed by UPLC-FD in 2009-2010.The decline curves of NPnEO in banana and soil accorded the first-order kinetics.The half-life of NPnEO turns to be 8.8-12 d in banana and 6.9-8.5 d in soil,its metabolites NP turns to be 16-18 d in banana and 24-26 d in soil.During the harvest period of the banana,the residue of NPnEO and NP in banana are under 0.01 mg/kg.By calculating,the intakes of NP per man and per day from banana is 0.09 μg.Risk quotient (RQ)is 0.003.The residue could be declined to the safety level.