Monthly Archives: October 2015

  1. Sonicators: How these agitating lab instruments work

    Sonicators: How these agitating lab instruments work

    Sound as Energy

    Energy comes in many forms. One of those is sound energy, which manifests as vibration. For example, we can hear a loud noise because receptor cells in our ears translate vibrations from sound energy into brain-bound electrical signals. Most sound waves lie outside our range of “hearing,” but produce energy nonetheless. In labs, this ultrasonic energy is used to agitate particles for the purpose of cleaning, mixing solutions, increasing dissolution rate, or to evaporate dissolved gasses from liquids.

    Sound travels through air, liquids and solids. The less dense the medium, and the closer the source, the easier the sound waves move. Sound “frequency” is a measure of particle vibration: higher frequencies cause more vibration, and as you can imagine, carry greater strength. Sonicators used in labs are high-frequency instruments that operate at levels above what humans can hear. These ultrasonic waves ar

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  2. Applications for Laboratory Ovens Across the Sciences

    Applications for Laboratory Ovens Across the Sciences

    Laboratory ovens are used in a wide range of applications in industries such as biotech, pharmaceuticals and materials manufacturing. These industries often require the process of baking, curing, annealing and drying materials of varying chemical and physical compositions. Many of these process applications are unique in their end-result and require assorted types of lab ovens.

    Process Definitions


    Gravity Convection Economy Ovens by Shel-Lab feature double-wall insulation and low-watt density heater

    Baking heats the substance without dehumidific

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  3. Absorption Spectroscopy in Pharmaceutical Analysis

    Absorption Spectroscopy in Pharmaceutical Analysis

    USP Compliance of Pharmaceutical Labs

    Absorption spectroscopy is an important analytical chemistry technique used in pharmaceutical analysis. The United States Pharmacopeia (USP) defines absorption spectroscopy as “the measurement of an interaction between electromagnetic radiation and the chemicals, or atoms, of a chemical substance.” To ensure the safety, quality and efficacy of compounds being produced, USP has developed standards and guidelines that must be observed by the pharmaceutical industry.

    To meet these guidelines, labs must rigorously follow USP Reference Standards when performing absorption spectroscopy. From a quality control standpoint, absorption spectroscopy assists with compliance in detecting chemical elements within a sample. Instruments with data-transfer capabilities provide traceable reporting, compliant with Good Manufacturing Practices (GMP). There are two popular absorption spectroscopy techniques used in pharma

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