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硫丹在茶叶中的残留动态与用药安全性评价
引用本文:曾明森,吴光远,夏会龙.硫丹在茶叶中的残留动态与用药安全性评价[J].华东昆虫学报,2009,18(2):101-106.
作者姓名:曾明森  吴光远  夏会龙
作者单位:1. 福建省农业科学院茶叶研究所,福建福安,355015
2. 浙江工商大学环境科学与工程学院,浙江杭州,310035
基金项目:福建省科技计划项目,福建现代农业茶产业技术体系岗位专家项目
摘    要:硫丹在茶叶中的消解动态符合一级动力学方程,在茶叶中的残留量随着施用剂量的增加而增加。硫丹在乌龙茶中的消解速率显著低于绿茶,同一环境下,35%硫丹乳油500倍、1000倍、1500倍、2000倍液处理在乌龙茶和绿茶中的半衰期分别为2.15-2.84d和1.65-1.98d,药后7d残留量分别为4.21mg/kg-12.04mg/kg和2.81mg/kg~8.98mg/kg。同时,由于气候差异,同一浓度处理的残留量和半衰期不同地区间的差异也较大。不同茶区,无论乌龙茶或绿茶品种,药后7d,1000倍、1500倍、2000倍液处理的残留量均在10.0mg/kg以下,而500倍的个别超过10.0mg/kg,但在20.0mg/kg以下,所以,按欧盟最高限量30.0mg/kg标准计,目前茶园施用该药安全间隔期为7d是合理的。本分析方法采用微型层析柱法净化,具有操作时间短,试剂用量省、净化效果好的优点,最低检出量为0.0006ng,最小检出浓度为0.0064g/g,该技术指标完全满足残留分析的要求。

关 键 词:硫丹  茶叶  残留  安全性评价

Residue dynamics and safety evaluation of endosulfan in tea
ZENG Ming-sen,WU Guang-yuan,XIA Hui-long.Residue dynamics and safety evaluation of endosulfan in tea[J].Entomological Journal of East China,2009,18(2):101-106.
Authors:ZENG Ming-sen  WU Guang-yuan  XIA Hui-long
Institution:1. Research Institute, Fufian Academy of Agricucural Sciences, Fu'an , Fujian 355015, China; 2. College of Environmental Science and Engineering, Zhejiang Gongshang University, Hangzhou, Zhejiang 310035, China)
Abstract:The dissipation dynamics of endosulfan in tea corresponded with the first-order kinetics curve, and the residue amount of endasulfan in tea increased with the increasing of the application dosage. The half life ranged 2. 15-2. 84 day in ootong tea and 1.65- 1.98 day in green tea, and the residual endosulfan ranged 4. 21-12. 04 mg/kg in oolong tea and 2. 81-8.98 mg/kg in green tea'after 7 days of application of 500-2000 times of diluted solution of Thiodan 35 EC at the same condition. The residue amount and haft life of endosulfan were significantly different in different areas when applied at the same dosage due to different climatic condition. After 7 days of application, the residual endosulfan in all of tea samples was less than 20 mg/kg, below 30 mg/kg which was fixed by Eu- ropoan Union, indicating that the Safety interval period for endosulfan fixed at 7 day was adequate. The detection amount and con- centration limit of endosulfan was 0. 0006ng and 0. 006ug/g. The analysis method for residual endosulfan in tea developed in this test had many advantages such as taking tess operation time, using tess chemical agent, and having better purification.
Keywords:endesnlfan  tea  residue  safety evaluation
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