Organic Impurities
Organic Impurities - Related Videos
09:14
Glovebox and Impurity Sensors
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2023
Source: Tamara M. Powers, Department of Chemistry, Texas A&M University The glovebox provides a straightforward means to handle air- and moisture-sensitive solids and liquids. The glovebox is what it sounds like: a box with gloves attached to one or more sides, which allows the user to perform manipulations within the glovebox under an inert atmosphere. For manipulations under inert atmospheres, chemists can choose between Schlenk or high-vacuum techniques and a glovebox. Schlenk and...
11:42
Fabrication of Gate-tunable Graphene Devices for Scanning Tunneling Microscopy Studies with Coulomb Impurities
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Cited by 14 •
2015
This paper details the fabrication process of a gate-tunable graphene device, decorated with Coulomb impurities for scanning tunneling microscopy studies. Mapping the spatially dependent electronic structure of graphene in the presence of charged impurities unveils the unique behavior of its relativistic charge carriers in response to a local Coulomb potential.
01:19
Pharmaceutical Alternatives: Excipients and Impurities-Related Therapeutic Nonequivalence
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2025
Pharmaceutical products contain more than just the active drug; they also contain various excipients such as binders, solubilizers, stabilizers, preservatives, and other elements. In some cases, impurities or contaminants might be present. Traditionally, quality control in pharmaceuticals has primarily focused on the analysis of the active drug, often overlooking the impact of these additional components. The recent issue with heparin contamination by over-sulfated chondroitin sulfate, a...
11:23
Purifying the Impure: Sequencing Metagenomes and Metatranscriptomes from Complex Animal-associated Samples
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Cited by 30 •
2014
Using the cystic fibrosis airway as an example, the manuscript presents a comprehensive workflow comprising a combination of metagenomic and metatranscriptomic approaches to characterize the microbial and viral communities in animal-associated samples.
03:02
Organic Compounds
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2020
All living things are formed mostly of carbon compounds called organic compounds. The category of organic compounds includes both natural and synthetic compounds that contain carbon. Although a single, precise definition has yet to be identified by the chemistry community, most agree that a defining trait of organic molecules is the presence of carbon as the principal element, bonded to hydrogen and other carbon atoms. However, some carbon-containing compounds such as carbonates, cyanides, and...
FAQs
Analysts separate compounds according to properties such as volatility, polarity, or molecular interaction, allowing individual components to be distinguished within a complex sample. They then measure the signals associated with the separated compounds to characterize the impurity profile. This approach helps determine which unwanted substances are present and supports decisions about material quality and process control.
Potential sources include contaminated raw materials, chemical reactions that produce unintended compounds, processing aids, equipment, degradation, and storage. Linking detected substances to these possible origins helps engineers investigate whether formation occurs during manufacturing, through contact with equipment, or after production. Source identification is important because effective control depends on addressing how an impurity enters or develops.
Even when present as minor constituents, organic impurities can alter a product's purity, performance, safety, or durability. Their effects may influence whether material or process specifications are consistently met and whether an engineered system performs reliably over time. Monitoring these substances therefore supports early detection of conditions that could contribute to product variation, failure, or reduced service life.
An investigation begins by obtaining a material or process sample and separating its compounds according to relevant properties, such as volatility, polarity, or molecular interaction. Analysts then measure the resulting signals and characterize the detected substances. Engineers can compare the findings with product specifications, examine likely sources, and use the results to guide process optimization or corrective control.
Impurity analysis provides information that can be used to evaluate whether materials and products meet defined purity and performance requirements. In quality control, repeated characterization helps monitor consistency across production. During materials qualification, the results contribute evidence about suitability and reliability. These activities connect chemical measurements with engineering decisions about acceptance, process control, and product use.
The analysis is valuable across manufacturing and chemical production, particularly when engineers must maintain consistent product specifications, investigate unexpected variation, or prevent failures. It also supports process optimization, materials qualification, and regulatory compliance. Identifying whether impurities arise from inputs, processing, equipment, degradation, or storage helps target controls and improves confidence in the reliability of the engineered system.