苹果中苯肽胺酸残留及消解  

Residues and dissipation dynamics of phthalanilic acid in apple

作　　者：李瑞娟[1] 周力[2] 刘同金[1] 崔淑华[3] 宋国春[1] 于建垒[1] 朱立贵[1] LI Ruijuan;ZHOU Li;LIU Tongjin;CUI Shuhua;SONG Guochun;YU Jianlei;ZHU Ligui(Institute of Plant Protection,Shandong Academy of Agricultural Sciences,Jinan 250100,Shandong,China;The Institute for the Control of Agrochemicals,Shandong Province,Jinan 250100,Shandong,China;Inspection and Quarantine Technology Center of Shandong Exit Entry Inspection and Quarantine Bureau,Qingdao 266002,Shandong,China)

机构地区：[1]山东省农业科学院植物保护研究所,济南250100 [2]山东省农药检定所,济南250100 [3]山东出入境检验检疫局检验检疫技术中心,山东青岛266002

出　　处：《果树学报》2020年第4期593-598,共6页Journal of Fruit Science

基　　金：山东省农业科学院农业科技创新工程(CXGC2018E04);农业部农药登记残留试验项目(2017F177)。

摘　　要：【目的】评价20%苯肽胺酸水剂在苹果上应用的残留水平,确保20%苯肽胺酸水剂在苹果上的安全使用。【方法】采用田间试验,使用QuEChERS方法进行样品前处理,液相色谱-串联质谱法进行定量分析,对苯肽胺酸在苹果中的消解动态及最终残留进行研究。【结果】苯肽胺酸在苹果中的半衰期为3.7~5.8 d,药后14 d消解86.7%以上。最终残留试验表明,20%苯肽胺酸水剂按施药剂量250 mg·kg-1(有效成分)和375 mg·kg-1(有效成分),喷药1次,收获时苯肽胺酸在苹果中的最终残留量均<0.01 mg·kg-1。【结论】20%苯肽胺酸水剂在苹果上按推荐剂量使用是安全的。【Objective】Phthalanilic acid is a new type of plant growth regulator. In recent years, it has been widely used in fruit trees and vegetables. To evaluate the residual level and dissipation dynamics of 20% aqueous solutions of phthalanilic acid in apples, and ensure the safe use of 20% aqueous solutions of phthalanilic acid in apples, the residue test of 20% aqueous solutions of phthalanilic acid on apples was carried out.【Methods】Field trials of 20% aqueous solutions of phthalanilic acid were carried out in research stations at three different locations, including Penglai of Shandong province, Huaibei of Anhui province and Changshun of Guizhou province, in 2017 and 2018. Both dissipation kinetics and residue determination experiments were carried out. The field trials involved a total of 4 treatments that consisted of 3 treatments at different doses and a blank control. There were three two-trees repeated for each treatment. The apple were applied with pesticides during young fruit for the degradation dynamic trials and the final residue trials. The 20% aqueous solutions of phthalanilic acid were evenly sprayed at a dose of 1.5 times of the recommended maximum dosage(375 mg · kg-1) once for the degradation dynamic trials by using knapsack sprayer and the blank control area was sprayed with water. The apple samples were collected at the 2 nd hour, 1, 3, 7, 14, 21, 28, 35 and 50 day after the application of pesticides. The 20% aqueous solutions of phthalanilic acid were evenly sprayed at 250(the recommended maximum dosage) and 375 mg · kg-1(1.5 times of the recommended maximum dosage) once for the final residue trials. The apples were sampled at harvest time after the pesticide application. The collected samples were cut into small pieces that were less than 1 cm. The evenly mixed samples were dispensed into two sets of 150 g sample by using the coning and quartering method, and loaded into sample bags with proper labeling. All labeled samples were stored at-20±2 ℃ in a low-temperature freezer. We empl

关 键 词：苹果 苯肽胺酸 残留 消解 

分 类 号：S661.1[农业科学—果树学]