Alkaloid Content
Alkaloid Content - Related Videos
09:10
An Efficient and Rapid HPLC-QQQ-MS Method for the Quantitation of Tropane Alkaloids in Medicinal Plants
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2026
This study developed a high-performance liquid chromatography coupled with triple quadrupole mass spectrometry (HPLC-QQQ-MS) method to identify and quantify tropane alkaloids (hyoscyamine, anisodamine, scopolamine) in Anisodus tanguticus. The method proved rapid, accurate, and reliable for high-throughput analysis of medicinal plants.
15:04
A Neuronal and Astrocyte Co-Culture Assay for High Content Analysis of Neurotoxicity
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Cited by 46 •
2009
This article describes a novel protocol and reagent set designed for sensitive measurement of neurotoxic effects of compounds and treatments on co-cultures of neurons and astrocytes using high content analysis. Results demonstrate that high content analysis represents an exciting novel technology for neurotoxicity assessment.
07:04
Determination of the Glycogen Content in Cyanobacteria
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Cited by 26 •
2017
Here, we present a reliable and easy assay to measure the glycogen content in cyanobacterial cells. The procedure entails precipitation, selectable depolymerization, and the detection of glucose residues. This method is suitable for both wildtype and genetically engineered strains and can facilitate the metabolic engineering of cyanobacteria.
02:16
Stereotype Content Model
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2020
The Stereotype Content Model (SCM) was first proposed by Susan Fiske and her colleagues (Fiske, Cuddy, Glick & Xu, 2002; see also Fiske, 2012 and Fiske, 2017). The SCM specifies that when someone encounters a new group, they will stereotype them based on two metrics: warmth—or that group’s perceived intent, and how likely they are to provide help or inflict harm—and competence—or their ability to carry out that objective. Depending on the warmth-competence categorization, a person will feel...
06:16
Determination of Moisture Content in Soil
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2023
Source: Laboratories of Dr. Ian Pepper and Dr. Charles Gerba - The University of Arizona Demonstrating Author: Bradley Schmitz Soils normally contain a finite amount of water, which can be expressed as the “soil moisture content.” This moisture exists within the pore spaces in between soil aggregates (inter-aggregate pore space) and within soil aggregates (intra-aggregate pore space) (Figure 1). Normally this pore space is occupied by air and/or water. If all the pores are occupied by air, the...
FAQs
Analysts take advantage of the weakly basic behavior of many alkaloids to separate them during acid–base extraction. Changing the chemical conditions influences whether these nitrogen-containing compounds remain associated with an acidic phase or can be separated for further analysis. This step helps prepare a sample for more reliable measurement and supports comparisons among plants, extracts, or pharmaceutical preparations.
Chromatography and spectrophotometry provide analytical routes for quantifying alkaloid compounds after sample preparation. Chromatography is particularly useful when analysts need information about individual components, while spectrophotometry can support measurement based on the sample’s response to light. Selecting an appropriate method helps connect measured concentration with product standardization, quality control, or pharmacological investigation.
Comparing alkaloid profiles shows whether samples contain similar compounds and relative patterns of occurrence. Differences may indicate variation between botanical materials, extracts, or preparations, even when the samples appear generally comparable. In medicine, these comparisons support investigations of product consistency and help researchers relate chemical composition to potential pharmacological effects or safety concerns.
A general workflow begins by preparing the plant material, extract, or pharmaceutical preparation for analysis. Analysts can then use acid–base extraction to separate alkaloid compounds, followed by chromatography or spectrophotometry to quantify them. The resulting measurements can be compared across samples or against intended product specifications, providing chemical evidence for consistency and quality assessment.
Measuring alkaloid content gives manufacturers and analysts a chemical basis for comparing botanical medicine preparations. Quantifying relevant compounds and examining their profiles can help determine whether different samples show consistent composition. This standardization is important because it connects the identity and amount of naturally occurring constituents with expectations for product quality and potential potency.
Alkaloid concentration can provide information relevant to the amount of active or potentially harmful constituents present in a preparation. Relating measured content to dose-related effects or toxicity helps inform medicinal assessment and safety evaluation. The same measurements also support pharmacological research by allowing investigators to compare chemical composition with observed effects and guide study of natural-source therapeutics.