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Determination of Analytes in Sample Matrix by Solvent Extraction

A matrix and sample technology, applied in the field of extraction of analytes using solvents and determination of mycotoxin levels in grains, can solve problems such as inapplicable rapid determination technology

Active Publication Date: 2021-01-05
FOSS ANALYTICAL AS
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This significantly reduces the risk and hazard aspects associated with higher concentrations of ethanol or other organic solvents such as methanol or acetonitrile, but unfortunately sufficient extraction takes approximately 1 hour to achieve, which is not suitable for rapid assay techniques

Method used

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  • Determination of Analytes in Sample Matrix by Solvent Extraction
  • Determination of Analytes in Sample Matrix by Solvent Extraction
  • Determination of Analytes in Sample Matrix by Solvent Extraction

Examples

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Embodiment Construction

[0023] Exemplary methods for assaying analytes in accordance with the present invention generally consist of figure 1 The flow chart is shown. At step 110, analyte extraction is performed. This involves mixing the sample matrix with the solvent, possibly including shaking or other agitation to ensure good mixing, and then separating the sample matrix from the solvent after an extraction period shorter than the time required to reach equilibrium, but during which time the sample matrix is ​​extracted from the matrix. The analyte can be moved into the solvent in measurable amounts.

[0024] Once separated, the level of the analyte in the solvent is measured at step 120 . The measurement technique used in this assay will of course depend on the analyte under study. Steps 110 and 120 will be repeated for each of a plurality of reference sample matrices with different reference analyte levels, and the results for each sample matrix are available to the computer. Reference value...

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Abstract

Analytes in the sample matrix are determined by solvent extraction. A method for assaying one or more analytes in a sample matrix, comprising the steps of: performing an analyte extraction on a sample matrix, the analyte extraction comprising combining the sample matrix with a solvent during an extraction period less than the time required for equilibration; and separate the solvent containing the analyte from the sample matrix; next measure the level of the analyte present in the separated solvent; then apply a calibration in the computer by which the The process used in extraction is the mathematical relationship between the level of analyte extracted from each of a plurality of reference samples and a reference value of the analyte level for each reference sample, resulting in a measure of the analyte level in the sample matrix. Specifically, a method for the determination of mycotoxins, especially OTA (ochratoxin A) and DON (deoxynivalenyl) in grain by mixing with a solvent containing a water-alcoholic mixture and a volume of 20-40% ethanol method of the amount of alcohol).

Description

technical field [0001] The present invention relates to a method for the determination of analytes in sample matrices, in particular mycotoxins levels in grains, and in particular to methods for analyte extraction using solvents. Background technique [0002] Mycotoxins tend to be very stable and can cause serious illness when ingested, inhaled or introduced into the body by any other means. For example, mycotoxins are considered toxic or carcinogenic when ingested by humans or animals. Mycotoxins are produced by molds and fungi during food and feed growth and may remain in food and feed after the mold or fungus that produced them has died. Therefore, products that are not significantly moldy or that do not test positive for mold counts may still contain potentially dangerous levels of mycotoxins. [0003] Several countries have currently established or proposed regulations for the control of mycotoxins (mainly aflatoxins) in food and animal feed. To harmonize these regul...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N15/10G01N1/40A23L5/20
CPCG01N1/4055G01N15/1012G01N15/1459G01N2001/2893G01N2001/4061G01N2015/1006G01N2030/009G01N2015/1014A23L5/23B01D11/02G01N33/543G01N33/569B01D11/0203G01N1/34G01N1/40G01N30/60G01N2030/062
Inventor C·Z·比斯加德M·达尔C·霍尔姆
Owner FOSS ANALYTICAL AS
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