Photodegradation of the organophosphorus insecticide ‘Phorate’
作者:B.K. Sharma、Navindu Gupta
DOI:10.1080/02772249409357980
日期:1994.3
The photolysis of Phorate(I) (0,0‐diethyl S‐ethyl thiomethyl phosphordithioate) has been studied as a thin film on a glass surface and in a solution of methanol‐water (60:40) by ultraviolet light (λ > 290 nm). The rate of disappearance of Phorate in the solution show first order Kinetics with a rate constant of 4.9 × 10–5 S –1. The half‐life of (I) exposed on a glass surface is found to be 5 hours
甲拌磷 (I)(0,0-二乙基 S-乙基硫代甲基二硫代磷酸酯)的光解已被研究为玻璃表面和甲醇-水(60:40)溶液中的薄膜,通过紫外光(λ > 290纳米)。甲拌磷在溶液中的消失速率为一级动力学,速率常数为 4.9 × 10–5 S –1。发现(I)暴露在玻璃表面上的半衰期为 5 小时。主要光产物的结构通过 1 H NMR 和质谱进行表征。
Electronic ID database and detection method for pesticide compounds in edible Agro-products based on GC-Q-Orbitrap
申请人:CHINESE ACADEMY OF INSPECTION AND QUARANTINE
公开号:US11181512B2
公开(公告)日:2021-11-23
Disclosed is an electronic ID database and detection method for pesticide compounds in edible agro-products based on GC-Q-Orbitrap. The electronic ID database includes a collection of various pesticide compounds electronic ID information and is sorted according to retention time in the electronic ID. The electronic ID contains pesticide compounds information, retention time, mass spectrum, fragment ions information and intelligent matching value. The detection method includes sample pretreatment procedures, setting GC-Q-Orbitrap operating conditions and screening procedures for pesticide residues in samples, wherein setting GC-Q-Orbitrap operating conditions includes setting suitable chromatography and mass spectrometry conditions. In pesticide residue screening procedures, firstly, the retention time is used to find out pesticide compounds in electronic ID database. If there is a match, the corresponding electronic ID information is extracted. Then the intelligent matching value is compared, if it is less than threshold value, the result is recorded and displayed, and the screening is completed.
本发明公开了一种基于 GC-Q-Orbitrap 的食用农产品中农药化合物电子 ID 数据库和检测方法。电子标识数据库包括各种农药化合物电子标识信息的集合,并根据电子标识中的保留时间进行排序。电子 ID 包含农药化合物信息、保留时间、质谱、碎片离子信息和智能匹配值。检测方法包括样品前处理程序、GC-Q-Orbitrap 操作条件设置和样品中农药残留筛选程序,其中 GC-Q-Orbitrap 操作条件设置包括设置合适的色谱和质谱条件。在农药残留筛选程序中,首先利用保留时间在电子 ID 数据库中查找农药化合物。如果匹配,则提取相应的电子 ID 信息。然后比较智能匹配值,如果小于阈值,则记录并显示结果,完成筛选。
Neutral esters of thiolphosphoric acid
申请人:BAYER AG
公开号:US02597534A1
公开(公告)日:1952-05-20
Synthesis of some O, O-diethylphosphoric acid thioesters
作者:Ya. L. Yarv、A. A. Aaviksaar、D. I. Lobanov、N. N. Godovikov