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Showing 1 to 12 of 12 for “"Matrix effect"”.
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Analysis of Strobilurin Fungicides, Neonicotinoid Insecticides and Degradation Products in Atmospheric Particles
… and apple orchards are the dominant crops. Matrix effect was determined to evaluate the performance of the developed sample clean-up procedure to remove the matrix. The determined matrix effect revealed that the highest exhibited matrix effects were for metabolites of neonicotinoids, while …
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A Fundamental Study on the Relocation, Uptake, and Distribution of the Cs⁺ Primary Ion Beam During the Secondary Ion Mass Spectrometry Analysis
… (SIMS) from the dilute limit (<1%) to matrix elements. The MCs+ technique has had great success in quantifying the sample composition of III-V semiconductors as well as dopants and/or impurities; however, it has been less effective at reducing the matrix effect for IV compounds, …
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Avaliação de métodos de preparação de amostras utilizados em bioensaios
… with the search for the analyte of interest. The effects caused by the interfering compounds are called matrix effect, and can be circumvented or mitigated by preparing biological samples techniques. Because of this, extraction techniques are per formed in an attempt to eliminate the components …
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Computational fluid dynamics modelling of fluid flow inside fractured reservoirs.
… of two distinct media sharing the same location: matrix and fracture, which affect each other's flow. Both have heterogeneous properties, such as anisotropic matrix permeability and rough fracture surfaces; also, fractures have varied orientation angles and exist in fractured formations in either …
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Development of a simple HPLC-UV method for determination of GFR by serum iohexol clearance
… the retention time of iohexol were observed. The matrix effect experiment showed a clinically acceptable variation at all concentration levels with a CV of the slopes of 2.7%. Stability of the stock solution was proven for at least 9 months at -80°C. Sample post-extraction stability was adequate …
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Ion Transmission in the first vacuum stage of an Inductively Coupled Plasma Mass Spectrometer
… analysis. However, the ICP-MS suffers from matrix effects. Matrix effects occur when instrument response varies as the composition of the sample matrix is changed. Matrix effects, or non-spectroscopic interferences, limit the accuracy of routine analysis. Identification of the sources of …
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Detection of Progesterone in Cow’s Milk for the Prediction of Reproductive Performance
… in cow’s milk one must overcome the milk matrix effects, negating the interference of the various components in milk on the measurement. The aim of the thesis is to develop a sensitive and practical test to measure P4 in cow’s milk for potential application in estrus detection. To reduce …
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Efeito de componentes da matriz na análise de agrotóxicos por cromatografia gasosa
O presente trabalho teve como objetivo estudar sistematicamente o efeito de matriz na quantificação dos agrotóxicos clorpirifós, λ-cialotrina, cipermetrina e deltametrina durante análises por cromatografia gasosa com detector por captura de elétrons. O efeito de matriz é atribuído à presença de …
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Direct drug screening and lipid profiling using ambient mass spectrometry
… and chemical characterizations. (2) How to effectively extract and ionize the target analyte with reduction of matrix effect. (3) How to produce sufficient and accurate structural and quantitative information on the mass spectrum. In this study, paper spray as a new spray-base AMS method has …
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Metabolomics and chemical library screening for antibacterial drug discovery
… and various parameters including linearity, matrix effect, stability, lower limit of detection and quantification to validate the analytical method. Finally, we showed the application of the developed method by determining the levels of proteinogenic amino acids DL-stereoisomers in mid-log …
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The nanostructure and degradation of C-S-H in Portland and blended cements
… weeks was also characterised in this work. A matrix effect was clearly observed by 29 Si MAS NMR. Cross-linking of the aluminosilicate anion structure of C-S-H occurred after leaching the sample for four weeks. Formulae were also presented for the average structural units in the C-S-H present …
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Investigations of Pharmacokinetic Challenges in Premature Infants
… the neonatal group. No significant interference effects from hemolysis, lipemia and hyperbilirubinemia were noted when these factors existed separately or were combined. Additionally, no significant matrix effect was observed for the developed bioanalytical assay.</p> <p>We then evaluated the …