我在故我思
第3楼2008/08/03
残留检测方法:
Determination of herbicides in mineral and stagnant waters at ng/L levels using capillary electrophoresis and UV detection combined with solid-phase extraction and sample stacking
HERNANDEZ-BORGES Javier; GARCIA-MONTELONGO Francisco J.; CIFUENTES Alejandro; RODRIGUEZ-DELGADO Miguel Angel;
Abstract:
In this work, the combined use of solid-phase extraction (SPE) and on-line preconcentration strategies as normal stacking mode (NSM) and stacking with matrix removal (SWMR) for the ultrasensitive and simultaneous capillary electrophoresis-ultraviolet analysis (CE-UV) of five triazolopyrimidine sulfonanilide pesticides (i.e., diclosulam, cloransulam-methyl, flumetsulam, metosulam and florasulam) in different types of water is investigated. An adequate separation electrolyte for the separation and stacking of these pesticides was obtained, considering also its compatibility with MS detection, which consisted of 24 mM formic acid and 16 mM ammonium carbonate at pH 6.4. It was observed that the use of this running buffer together with the SWMR preconcentration method provided the best results in terms of sensitivity (between 6.54 and 11.9 μg/L) and peak efficiency (up to 550000 theoretical plates per meter, NTP/m). When this on-line preconcentration procedure was combined with an off-line sample preconcentration step as SPE using C18 cartridges, the selected herbicides could be detected in the ng/L range. The optimized SPE-SWMR-CE-UV method was applied to the determination of the selected group of pesticides in spiked and non-spiked mineral and stagnant waters. Recoveries ranged between 55 and 110% and limits of detection between 131 and 342 ng/L. This work shows the great possibilities of the combined use of SPE-SWMR-CE-UV to overcome the sensitivity problems usually linked to CE analysis.
Journal of chromatography
2005, vol.1070,1-2, 171-177
我在故我思
第4楼2008/08/03
Simultaneous Determination of Residues of Approximately 100 Pesticides and Metabolites in Fruit and Vegetables by LC/MS/MS(全文)
Experimental
Extraction and cleanup procedures are described in Figure 1. Using the readyfor- use method files on the CD ROM in combination with API 2000, API 3000, and API 4000 LC/MS/MS Systems following pesticides and their metabolites can be identified and quantified: 3,4,5-trimethacarb, 3-hydroxycarbofuron, 5-hydroxyclethodimsulfone, 5-hydroxythiabendazole, acephate, aldicarb, aldicarbsulfoxide, aldoxycarb, amidosulfuron, atrazine, azoxystrobin, bendiocarb, bensulfuronmethyl, butocarboxim, butocarboxim-sulfoxide, butoxycarboxim, carbaryl, carbendazim, carbofuran, chlorsulfuron, cinosulfuron, clethodim, clethodimiminsulfone, clethodimiminsulfoxide, clethodimsulfone, clethodimsulfoxide, cyprodinil, daminozid, demeton-S-methyl, demeton-S-methylsulfone, desmedipham, desmethylformamidopirimicarb, desmethylpirimicarb, dimethoate, diuron, ethiofencarb, ethiofencarbsulfone, ethiofencarbsulfoxide, fenhexamid, fenoxycarb, fenpropimorph, flazasulfuron, florasulam, fluazifoppbutyl, flufenoxuron, fosthiazate, furathiocarb, haloxyfopethoxyethyl, haloxyfopethyl, imazalil, imidacloprid, indoxacarb, iodosulfuronmethyl, iprovalicarb, isoproturon, linuron, metalaxyl, metamitron, methamidophos, methiocarb, methomyl, metolachlor, metsulfuronmethyl, monocrotophos, nicosulfuron, omethoate, oxamyl, oxydemetonmethyl, phenmedipham, pirimicarb, primisulfuronmethyl, promecarb, propamocarb, propoxur, prosulfuron, pymetrozin, pyridate, pyridatmetabolite, pyrimethanil, quinmerac, quizalofopethyl, rimsulfuron, spiroxamine, tebuconazole, tebufenozid, thiabendazol, thiacloprid, thifensulfuronmethyl, thiodicarb, thiofanox, thiofanoxsulfone, thiofanoxsulfoxide, thiophanatmethyl, triasulfuron, tribenuronmethyl, triflusulfuronmethyl and vamidothion (Figure 2).
我在故我思
第5楼2008/08/03
这份资料的内容比较全,资料的目录中有详细内容的说明。
Proposed Regulatory Decision Document PRDD2004-04
Florasulam
EF-1343 Suspension Concentrate HerbicideFlorasulam EF-1343 Suspension Concentrate Herbicide
我在故我思
第6楼2008/08/03
Determination of 44 Pesticides in Foodstuffs by LC/MS/MSDetermination of 44 Pesticides in Foodstuffs by LC/MS/MS
何当奇
第12楼2008/08/04
这个里面不会有分析方法。这个是对dow 的产品在加拿大登记回顾和建议,包括对产品介绍,危害评估等各方面内容,是个产品的总结性文档。我们做国外登记的时候时常会到这种文档上找资料。