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Catalog excerpts
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PesticideScreener • Comprehensive Pesticide Screening and Quantitation Innovation with Integrity
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The Challenge of Comprehensive Pesticide Residue Analysis The use of pesticides to reduce crop damage and increase horticultural productivity has been implemented on a global scale for many decades. Due to their toxicity, the potential migration of these chemicals into the human food and water supply chains presents considerable health concerns for the population at large. Therefore the maximum residue level (MRL) permitted for pesticides in food, feedstuffs and water are strictly controlled by local and international regulatory bodies. One of the most important aspects in reducing...
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The Power of Accurate Mass for Screening and Quantitation The Bruker PesticideScreener is based on industry leading Liquid Chromatography - Quadrupole Time of Flight (LC-QTOF) accurate mass technology. The use of accurate mass for trace pesticide residue screening has significant throughput and cost-saving benefits as it potentially allows for an unlimited number of pesticides to be analyzed in a single run without the need to use expensive standards for every compound. Sample Fruit / vegetable: QuEChERS Water: SPE, LLE or direct injection LC-QTOF UHPLC + Bruker QTOF Chromatographic...
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Measurement of the precursor accurate mass and retention time alone can lead to a high number of false positive results, particularly with complex matrices such as QuEChERS extractions. However by including 'diagnostic' qualifier ion (Ql) information as a mandatory requirement in the confirmation criteria, false positive detections are practically eliminated, delivering maximum confidence in your screening result. Fig.2: Illustrating the accumulation of retention time and qualifier Ion Information to reduce false positive detections Cumulative Increase in Confidence The Bruker...
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Eliminate False Positive Findings and Achieve Unambiguous ID´s At the heart of the PesticideScreener solution lies the accurate mass pesticide database. In addition to monoisotopic precursor ion masses and retention time data, the database also contains diagnostic QI information, comprising of accurate mass bbCID fragments and ‘in source’ fragment ions as well as adduct and isomer information (see figure 3). The PesticideScreener retention time tolerances can be independently adjusted by the user for each pesticide The analyst can assign any ion(s) as mandatory to meet confirmation/...
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Data processing for screening and quantitation is powered by TASQ (Target Analysis for Screening and Quantitation) software. TASQ intelligently uses the diagnostic Ql's to reduce false positive detections, bringing a new level of confidence to screening workflows (see figures 5 and 6). Color coded screening results are easily reviewed in either a sample centric or analyte centric fashion as desired by the analyst. Once reviewed, qualitative and quantitative sample reports are then easily generated. Top pane: Screening result table for an orange QuEChERS extract showing positive...
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Quantitation Over a Wide Dynamic Range… If calibration standards are incorporated into the experiment, then a combined screening and quantitation experiment is realised without the need for a second sample injection. PesticideScreener, also supports semiquantitative workflows by exploiting single point and multi-point legacy calibrations functions to deliver new levels of productivity to your laboratory. Quantifier and qualifier hrXIC traces for carbendazim in orange at 10 ppb. The presence of the confirmatory QI within the ion ratio limits provides additional confidence in the quantitative...
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The PesticideScreener applications kit enables you to readily deploy routine pesticide screening and quantitation. Included within the applications kit are the analytical and guard columns, a test mix, accurate mass pesticide database and all the necessary chromatographic and mass spectrometric parameters that are needed to perform the screening workflow, The PesticideScreener is a ready to go solution, requiring no method development, delivering maximum productivity to your laboratory in the shortest possible time, Bruker PesticideScreener: Maximize your laboratory throughput; Spend less...
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