摘要:
2012 年 8 月在珠江河网采集水产品样品(13 种鱼,4 种虾和 2 种贝),采用超声波提取-气相色谱法对样品中菊酯类农药(PYRs)进行残留检测,并对鱼类 PYRs 暴露水平进行健康风险评价。结果显示,鱼类肌肉、虾类和贝类中 PYRs 质量分数分别介于 ND~3.05 μg·kg-1、0.05~1.13 μg·kg-1和 0.69~1.20 μg·kg-1(ND 为未检出,以湿重计),平均值分别为 0.90 μg·kg-1、0.41 μg·kg-1和 0.99 μg·kg-1。虾类和贝类中 PYRs 的检出率均很高,除联苯菊酯在虾类体内检出率为 75% 外,其他菊酯均为 100%,鱼类肌肉中氯菊酯检出率最高,达到 100%。氯菊酯在鱼类肌肉和贝类中的检出量最高,分别占总菊酯质量分数的 52.2% 和 55.4%,溴氰菊酯在虾类中检出量最高,分别占总菊酯质量分数的 33.0%; 对居民通过食物摄入的 PYRs 进行食用暴露风险评估,结果表明,珠江河网水产品中 PYRs 人体健康危害的年总风险评价介于 3.96×10-13~1.21×10-10a-1,水产品的安全消费量为 5.54×104 kg·d-1,水产品中的 PYRs 的健康危险风险很小。
Abstract:
Samples of aquatic animals, including thirteen kinds of fish, four kinds of shrimp, and two kinds of shellfish, were collected from the Pearl River Delta in May 2012. And then, pyrethroid pesticide residue in biological tissue was analyzed using ultrasonic extraction-gas chromatograph-electron capture (GC-ECD) method. Results showed that the concentrations of pyrethroid pesticides in fish muscle, shrimp, and shellfish ranged from ND to 3.05 μg·kg-1, averaged 0.90 μg·kg-1, from 0.05 to 1.13 μg·kg-1, averaged 0.41 μg·kg-1, and from 0.69 to 1.20 μg·kg-1, averaged 0.99 μg·kg-1, respectively. Detection rate of seven kinds of pyrethroid pesticides were 100%, while in shrimp and shellfish was 75% for bifenthrin. Permethrin was the most detect residual pesticide in fish muscle with a detection rate of 100%, which also was the highest concentration in fish muscle and shellfish with 52.2% and 55.4% of total pyrethroid pesticides, respectively. Deltamethrin was the most detect residual pesticide in shrimp with 33.0% of total pyrethroids. In addition,health risk of pyrethroid pesticides via food consumption was also assessed. The results showed that chemical exposure risk index (ERI) of pyrethroid in the Pearl River Delta was ranged from 3.96×10-13 to 1.21×10-10a-1, and the safety consumption of the aquatic products was 5.54×104 kg·d-1, which indicated that pyrethroid pesticides residue in the Pearl River Delta posed lower risk
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