Results 291 to 300 of about 130,892 (321)
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Establishing LOQ for estradiol, LH, FSH and testosterone on Roche Cobas e801
Endocrine Abstracts, 2023Introduction: The limit of quantification (LOQ) is defined as the lowest analyte concentration that can be reproducibly measured with defined imprecision expressed as CV (coefficient of variation). Low concentrations of hormones estradiol, LH, FSH and testosterone are essential in diagnosis and monitoring of various endocrine disorders.
Goreta, Sanja +3 more
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Experimental Comparison of the Different Approaches To Estimate LOD and LOQ of an HPLC Method
Analytical Chemistry, 1999Detection and quantification limits (LOD and LOQ) are two fundamental elements of method validation. Rigorous statistical definitions exist, but in HPLC they could not be implemented. Nevertheless there are several estimation methods for these limits. The most commonly used is the signal-to-noise ratio criterion.
J. Vial, A. Jardy
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, 2016 The European Union Reference Laboratory (EURL) for Polycyclic Aromatic Hydrocarbons (EURL PAH), the EURL for Heavy Metals in Feed and Food (EURL HM), the EURL for Mycotoxins (EURL Mycotoxins), and EURL for Dioxins and PCBs in Feed and Food aim to provide with this document guidance to official food control in the EU on the estimation of the limit of ...
T. Wenzl +6 more
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Food Chemistry, 2022
Simple, rapid, low cost, selective, and sensitive analytical method was developed using fatty acid-based ternary deep eutectic solvents (TDESs) for extraction and determination of tetracycline in honey, milk and water samples by vortex assisted (VA ...
M. F. Lanjwani, Nail Altunay, M. Tuzen
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Simple, rapid, low cost, selective, and sensitive analytical method was developed using fatty acid-based ternary deep eutectic solvents (TDESs) for extraction and determination of tetracycline in honey, milk and water samples by vortex assisted (VA ...
M. F. Lanjwani, Nail Altunay, M. Tuzen
semanticscholar +1 more source
European Food Research and Technology, 2008
The predominant approach for quantification of genetically modified organisms (GMO) is the application of quantitative real-time PCR. However, for a large number of processed food and feed products, this approach is unsuitable, because they contain low amounts (mass) of amplifiable DNA. Here we present a novel approach, “Single molecule quantification”
K. G. Berdal +3 more
semanticscholar +2 more sources
The predominant approach for quantification of genetically modified organisms (GMO) is the application of quantitative real-time PCR. However, for a large number of processed food and feed products, this approach is unsuitable, because they contain low amounts (mass) of amplifiable DNA. Here we present a novel approach, “Single molecule quantification”
K. G. Berdal +3 more
semanticscholar +2 more sources
2021
Optical methods (light or electron microscopy) are, in most cases, the basis for measuring the asbestos concentration either in air or in materials. The individual methods are described in a variety of guidelines or standards. The definition of terms like detection limit and analytical sensitivity have led to numerous discussions, driven by the fact ...
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Optical methods (light or electron microscopy) are, in most cases, the basis for measuring the asbestos concentration either in air or in materials. The individual methods are described in a variety of guidelines or standards. The definition of terms like detection limit and analytical sensitivity have led to numerous discussions, driven by the fact ...
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Insect Biochemistry and Molecular Biology, 2015
The phenomenon of RNA interference (RNAi) has been found in various organisms. However, the proteins implicated in RNAi pathway in different species show distinct roles. Knowledge on the underlying mechanism of lepidopteron RNAi is quite lacking such as the roles of Loquacious (Loqs) and R2D2, the dsRNA-binding proteins in silkworm RNAi pathway.
Li, Zhu +6 more
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The phenomenon of RNA interference (RNAi) has been found in various organisms. However, the proteins implicated in RNAi pathway in different species show distinct roles. Knowledge on the underlying mechanism of lepidopteron RNAi is quite lacking such as the roles of Loquacious (Loqs) and R2D2, the dsRNA-binding proteins in silkworm RNAi pathway.
Li, Zhu +6 more
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OVERVIEW OF VALIDATION PRINCIPLES II: PRECISION, LOD, LOQ AND ANALYTICAL RESULT
2010The precision is a measure for the size of the random errors. From a statistical point of view, precision measures the dispersion of the results around the mean, irrespective of whether that mean is a correct representation of the true value. Therefore, it requires the measurement of the standard deviation. How this is done depends on the context.
Bolanča, Tomislav, Ukić, Šime
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Drug Development and Industrial Pharmacy, 2000
Calibration is the process of fitting a model based on reference data points (x, y), then using the model to estimate an unknown x based on a new measured response, y. In DNA assay, x is the concentration, and y is the measured signal volume. A four-parameter logistic model was used frequently for calibration of immunoassay when the response is optical
K R, Lee, B, Dipaolo, X, Ji
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Calibration is the process of fitting a model based on reference data points (x, y), then using the model to estimate an unknown x based on a new measured response, y. In DNA assay, x is the concentration, and y is the measured signal volume. A four-parameter logistic model was used frequently for calibration of immunoassay when the response is optical
K R, Lee, B, Dipaolo, X, Ji
openaire +2 more sources