Herbal Compound Analysis
Herbal Compound Analysis - Related Videos
07:34
Use of Animal Model of Sepsis to Evaluate Novel Herbal Therapies
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Cited by 13 •
2012
Sepsis refers to a systemic inflammatory response syndrome resulting from a microbial infection, and can be simulated by a surgical technique termed cecal ligation and puncture (CLP). Here we describe a method to use CLP-induced animal model to screen medicinal herbs for therapeutic agents.
08:07
Preparation of Herbal Medicine: Er-Xian Decoction and Er-Xian-containing Serum for In Vivo and In Vitro Experiments
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Cited by 6 •
2017
Here, we present the preparation of an er-xian decoction (EXD) in four steps—soaking, decoction, filtration, and concentration—and demonstrate the administration of a prepared EXD-containing serum to rats. These methods are applicable to the in vivo and in vitro study of herbal decoctions such as traditional Chinese medicines.
07:49
On-line Analysis of Nitrogen Containing Compounds in Complex Hydrocarbon Matrixes
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Cited by 14 •
2016
A method combining comprehensive two-dimensional gas chromatography with nitrogen chemiluminescence detection has been developed and applied to on-line analysis of nitrogen containing compounds in a complex hydrocarbon matrix.
09:38
Compound Administration II
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2016
Source: Kay Stewart, RVT, RLATG, CMAR; Valerie A. Schroeder, RVT, RLATG. University of Notre Dame, IN Compound administration is often an integral component of an animal study. Many factors need to be evaluated to ensure that the compound is delivered correctly. The route of administration affects the mechanisms of absorption. The characteristics of the substance to be introduced (the pH, viscosity, and concentration) may dictate which route of administration is selected.
02:38
Molecules and Compounds
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2020
Atoms and Molecules Everything in the universe is made up of matter, and matter is composed of a combination of elements. An atom is the smallest unit of an element that retains all properties of the element. For example, a silver coin is made up of silver atoms, and each silver atom retains the unique properties of the element — silver. Elements are pure substances consisting of identical atoms that cannot be broken down into simpler substances by chemical changes. Atomic elements contain...
FAQs
Chromatography separates the many constituents in an extract before characterization, reducing overlap between chemical signals. This separation allows analysts to associate individual components with mass spectra or nuclear magnetic resonance patterns more confidently. The resulting chemical profile can distinguish mixtures, reveal groups such as alkaloids or flavonoids, and support comparison among plant-derived materials.
Extract preparation determines which constituents enter the analytical sample and therefore influences the profile that can be measured. Because herbal materials contain chemically diverse compounds, preparation affects the representation of bioactive constituents and other components. Consistent preparation is consequently important when analysts compare samples, evaluate quality, or investigate differences caused by processing or storage.
Mass spectra and nuclear magnetic resonance patterns provide complementary chemical evidence for characterizing separated constituents. Mass-spectral signals contribute information used to recognize compounds, while nuclear magnetic resonance patterns provide another form of structural characterization. Using both signal types can strengthen assignments and make conclusions about composition more reliable than relying on a single analytical perspective.
Each factor can alter the relative composition measured in a plant-derived sample. Differences among species may produce distinct constituent patterns, while cultivation, processing, or storage can further modify those profiles. In chemistry research, tracking these changes helps explain variation in biological activity or quality and supports decisions about authentication, standardization, and sample comparability.
A typical workflow begins by preparing an extract from the plant-derived material. Analysts then separate its components chromatographically and characterize the separated constituents using signals such as mass spectra or nuclear magnetic resonance patterns. They can interpret the resulting profile to assess composition, compare samples, identify relevant constituent classes, and examine possible contaminants.
The chemical profile is not limited to bioactive compounds. Chromatographic separation and subsequent signal-based characterization can expose constituents that do not belong among the expected alkaloids, flavonoids, terpenes, or phenolic compounds, including contaminants. Detecting these additional signals supports safety evaluation and helps distinguish a correctly identified, appropriately processed material from one with an unwanted chemical composition.
Measurements of chemical composition provide a basis for comparing batches and determining whether materials have sufficiently similar profiles. This supports authentication, quality control, and standardization, while also helping researchers relate composition to biological activity. Reproducible chemical characterization is especially valuable when developing herbal medicines or preparing plant-derived materials for natural-products chemistry studies.