Persistence of bifenthrin in tea and its transfer from black tea to tea brew

茶叶科学 Pub Date : 2015-12-08 DOI:10.5376/JTSR.2015.05.0009

S. Seenivasan, N. Muraleedharan

引用次数: 0

Abstract

Field experiments were conducted at two places in Tamil Nadu (India) to determine the residues of bifenthrin in black tea. Residues were quantified at different harvest intervals of ‘0’ (3 hr), 1 st , 3 rd , 5 th , 7 th , 10 th and 14 th day after acaricide application. Persistence, dissipation pattern, half-life value and safe harvest interval of the acaricide in tea were calculated. Residues of bifenthrin dissipated exponentially after application at both the locations and reached below the European Union maximum residue limit (MRL) of 5 mg kg-1 on the 10th day. Bifenthrin showed that like other acaricides it followed the first order dissipation kinetics. Half-life values varied from 2.4 to 3.2 days for bifenthrin and a safe harvest interval of 10 days is suggested for tea at the recommended dosage.

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联苯菊酯在茶叶中的残留及其从红茶到泡茶的转移

在印度泰米尔纳德邦的两个地方进行了实地试验，测定了联苯菊酯在红茶中的残留量。在施用杀螨剂后第0(3小时)、第1、第3、第5、第7、第10和第14天的不同收获间隔进行残留定量。计算了杀螨剂在茶叶中的持久性、耗散规律、半衰期值和安全采收期。施用后，两个地点的联苯菊酯残留量呈指数消散，在第10天达到欧盟最大残留限量(MRL) 5 mg kg-1以下。联苯菊酯与其他杀螨剂一样，具有一级耗散动力学。联苯菊酯的半衰期从2.4天到3.2天不等，建议在推荐剂量下茶叶的安全采收间隔为10天。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

茶叶科学

CiteScore

1.50

自引率

0.00%

发文量

2558

期刊介绍： The Journal of Tea Science was established in August 1964, approved by the Publicity Department, CCCPC. Its title was inscribed by Zhu De, the chairman of CCCPC. It was discontinued during the Cultural Revolution in 1966, and it was reissued in August 1984, approved by the State Scientific and Technological Commission.Academicians Chen Zongmao and Liu Zhonghuaof the Chinese Academy of Engineering served as the directors of the editorial board. The Journal of Tea Science is managed by the China Association for Science and Technology,sponsored by the China Tea Science Society and the Tea Research Institute of the Chinese Academy of Agricultural Sciences, and edited and published by the editorial office of the Journal of Tea Science. It is the only one of Chinese core journals in the field of tea science that is included in the core library of the Chinese Science Citation Database.Its Domestic Unified Serial Number is CN 33-1115/S, its International Standard Serial Number is ISSN 1000-369X and its International publication name code is CODEN-CHKEF4. At present, the Journal of Tea Science is a bimonthly publication, published in the middle of the month, with a book size of 16.