Test Method The melting point of a crystalline solid is the temperature at which the solid to liquid phase transition occurs, referenced at one atmosphere (1 ATM) of pressure.
Features and Benefits • Conforms to BP Appendix 5 - Method 6 and GLP specifications
• Readily interchanged between automatic and manual detection of melting point ranges
• Intelligent Lamp Intensity Control with Soft Start
• Storage capacity for up to 20 sample tests
• User-interactive software and data entry, including easy alphanumeric entry of sample name, ID number, and date • User selectable operating modes: automatic and manual. K90100 Automatic Melting Point Range Apparatus The Koehler Automatic Melting Point Range Apparatus is the latest technology for microprocessor-based determinations of melting point ranges of crystalline, powdered and polymeric materials, and is used to assess sample purity. Requires approximately 5mg of sample spread uniformly on a glass slide, covered with a glass coverslip. The slide is placed on a uniformly heated, round furnace and subjected to a heating profile as required by the user. Two user operating modes are available: automatic and manual. In the automatic mode, the start and end of melting point range is automatically detected by a photosensing device. In the manual mode, the start and end of melting point range can be selected manually with a key-press by the user. Sample melting point can be determined as per the BP method by the ‘Heat & Cool’ temperature function. The melting process is recorded and viewed on-screen in real-time by a CCD camera. Precise temperature control gives reproducible results to within 1%. The unit contains an automatic temperature safety cut-off feature if no melting points are detected 15°C above the expected melting point or if the oven reaches 315°C. The melting process is magnified, recorded, and viewed on-screen in real-time by a CCD camera. The change in physical appearance of the sample with respect to temperature is recorded, and the start/end of melting is observed automatically. A representation of the entire process can be printed out in graphical form for validation.
Specifications Conforms to: BP Appendix 5-Method 6; GLP