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Effectiveness of Selected Reaction Monitoring for rapid assay of Cypermethrin Residue in Perilla Leaves

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Advances in Materials Physics and Chemistry 2011年第1期1卷 1-5页

作者： Noriyasu Niimura DATUM Solution Business Operations JEOL Ltd.

Many kinds of pesticides have been developed and used to yield a good harvest but the residues in agricul-tural products cause health problems. It is important to keep watch on these residues by using adequate methods of analysis. Pretreatment such as gel permeation chromatography (GPC) or column chromatography is often needed for the quantitative analysis of pesticide in agricultural products by conventional methods such as gas chromatography/low resolving power mass spectrometry (GC/LRMS). However, these pretreat-ments need a lot of work and take time. New methods saving the necessity of these pretreatments have been desired. We have applied selected reaction monitoring (SRM) to quantitatively determine cypermethrin residues in Perilla frutescens samples and compared the results with LRMS and HRMS in SIM mode. A background peak caused by the matrix overlapped the cypermethrin peak in the analysis using LRMS. SRM and HRMS in SIM mode provided chromatograms without matrix interference. The high selectivity of the product ion (m/z 127) produced from precursor ion (m/z 163) isolated the target peaks from the matrix peaks when using SRM. This method eliminates the pretreatment step, thus saving time and simplify ing the ana-lytical process.

关键词： pesticide Residue Cypermethrin Perilla Frutescens Selected Reaction Monitoring high Re-solving Power mass Spectrometry

Multiclass screening of ＞ 200 pharmaceutical and other residues in aquatic foods by ultrahigh performance liquid chromatography-quadrupole-Orbitrap mass spectrometer

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Multiclass screening of ＞ 200 pharmaceutical and other resi...

Court Rules in Favor of BASF in Patent Litigation

中国化学会第十三届全国分析化学年会

作者： Cong Kong Yang Wang Guang-Xin Yang Yong-Fu Shi Xiao-Yi Lou Hui-Juan Yu Key Laboratory of East China Sea Fishery Resources Exploitation Ministry of Agriculture East China Sea Fisheries Research Institute Chinese Academy of Fishery Sciences

A quick screening method of ＞200 pharmaceutical and other residues in aquatic foods based on ultrahigh performance liquid chromatography-quadrupole-Orbitrap mass spectrometer system（UHPLC-Q/Orbitrap MS） was established. In this method, after the addition of 200 μL of 1 M EDTA-Na2, 2 g homogenates were extracted successively with 10 mL of acetonitrile and 10 mL of ethyl acetate. The extracts were combined and dried under nitrogen flow, and redissolved in 0.1% formic acid in acetonitrile/water（4:6, v/v） for analysis. The prepared samples were analyzed through UHPLC-Q/Orbitrap MS system, at Full MS/ddMS2（full-scan data-dependent MS/MS） mode. Identification was performed through the comparison of the sample data with the database for standard chemicals, including the retention time, precursor ion, product ions and isotope pattern for all 206 compounds. Five different aquatic food matrices（carp, shrimp, crab, eel, and mussel） spiked with the analytes at 1, 10, and 50 ng/g were evaluated to assess recoveries, precision, matrix effects, stability, and detection limits using the method. UHPLC analyses were 25 min, and 178-200 analytes met identification criteria at 50 ng/g depending on the matrix. Furthermore, practical application of this method for real samples displayed strong screening capability

关键词： Veterinary Drug Aquatic Food Screening Orbitrap pesticide Contaminant Residue

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China Chemical Reporter 2008年第9期19卷 9-9页

作者： Tanya Tian

A recent patent litigation case was ruled in favor of BASF and against the chemi-cal manufacturer Shouguang Shuangxing pesticide Co.,Ltd.,a pesticide

关键词： pesticide manufacturer chemi BASF Patent patent Sh

Nanjing Redsun Unveils Restructuring Plan

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China Chemical Reporter 2008年第36期19卷 7-7页

Nanjing Redsun Co..Ltd(SZ:000525)plans to issue up to 300 million shares at RMB9.28 apiece to Nanjing No.1 pesticide Group Co.,*** acquire pesticide-relatedassets,

关键词： Nanjing pesticide shares acquire assets 卜山 milli

Extranodal natural killer/T-cell lymphoma,nasal type:epidemiology study

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The Chinese-German Journal of Clinical Oncology 2012年第5期11卷 290-293页

作者： Yao Liao Xiaobo Du Qingfeng Zou Department of Oncology Mianyang Central Hospital Mianyang 621000 China The Second Internal Department The affiliated Tumor Hospital of Guangzhou Medical College Guangzhou 510000 China

Extranodal natural killer （NK）IT-cell lymphoma, nasal type （ENKTCL） is a rarely kind of non-Hodgkin lymphoma （NHL）. It is much more frequent in Asian and Latin American countries than other part of the world. It typically affects nasal cavity. In China, one of its endemically places, ENKTCL accounts for 74%-96% of nasal NHL. Patients with ENKTCL usually show a highly aggressive clinical course, and its etiology is unclear. However, it is already proved that ENKTCL is associated with Epstein-Barr virus （EBV） infection, regardless patients＇, ethnicity and areas. Some studies show that the risk will increase among several occupations, such as farmer, who are frequently exposure to pesticides and chemical solvent and risk can be cut down if taking some protective measures.

关键词： nasal lymphoma natural killer (NK)/T-cell type epidemiology pesticide Epstein-Barr virus (EBV)

ICGI: Past, Present and Future Direction

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棉花学报 2002年第S1期14卷 11-11页

作者： Roy G.CANTRELL Lloyd MAY Cotton Incorporated Agricultural Research CaryNC 27513USAUniversity of GeorgiaCrop and Soil Science TiftonGA 31793USA

Cotton is viewed as the most important cash cropin the world,and sustains the agriculturaleconomies of many nations by providing asustainable fiber product for the ***,many challenges face cottonproduction at present ... 详细信息

关键词： Cotton providing nations challenges challenging cotton Genomics genomics cooperation pesticide

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农药与食品安全

山东省农业管理干部学院学报 2003年第3期19卷 116-116页

作者：季朝文临沂师范学院地理与旅游系

一、使用农药与我国食品安全现状目前,我国农药市场总需求量为25.7万吨左右,甲胺磷、敌敌畏、杀虫双、硫酸酮、乙草胺等农药的年需求量都在万吨以上.

关键词： pesticide food security strategy.

用代谢组学技术研究农药联合毒性效应(英文)

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用代谢组学技术研究农药联合毒性效应(英文)

全国农业生物化学与分子生物学第十五届学术研讨会

作者：伍一军中国科学院动物研究所分子毒理学实验室

pesticides are extensively used around the world and pesticide toxicity has become a serious threat to human health and *** approach has been applied in many aspects of pesticide toxicology research such as eco-environmental toxicity studies,biomarker identification,and mechanism of toxicity *** order to better understand the actions of multiple pesticides,which

关键词： metabonomics pesticide risk assessment toxicology environmental toxicity

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“有机农业的惊天骗局”设了什么局?

营销界 2016年第12期 68-70页

作者：郭坚华肖兴基

Miller博士不会缺少常识,为什么写这么一篇偷换概念、颠倒黑白的文章？美国人很善于表达,各路大神通过媒体相互掐架的事情不胜枚举。我们倒是奇怪为什么有人愿意花费时间单单翻译并在中国网站上公布《有机农业的惊天骗局＂一文？》惊闻... 详细信息

Miller博士不会缺少常识,为什么写这么一篇偷换概念、颠倒黑白的文章？美国人很善于表达,各路大神通过媒体相互掐架的事情不胜枚举。我们倒是奇怪为什么有人愿意花费时间单单翻译并在中国网站上公布《有机农业的惊天骗局＂一文？》惊闻有人在福布斯发表了“有机农业的惊天骗局”（以下简称“惊天”）一文！第一作者Henry I Miller 1974年出生，于加州大学SanDiego分校获医学博士。

关键词：有机农业偷换概念农业法规化学合成农药有机食品第一作者活体试验农药工业用事实说话 pesticide