![]() Automatic video camera detection of the decrease in transmitted light intensity is the key to obtaining repeatable and reliable cloud point results. This turbidity is monitored via transmitted light detection – the higher the temperature above the cloud point, the more turbid the solution, and thus less light is transmitted through the solution. The solution of interest is transparent at the beginning of the experiment, and when the cloud point is reached, the solution becomes turbid. Approximately 100 µL of sample is pipetted into a glass tube and inserted into the cloud point tester. Cloud point determination is typically performed with a 1% weight dilution of the substance of interest in water. Ambient pressure is measured with a built-in calibrated barometer, and compensation to sea-level pressure is automatically calculated and applied to the results.Ĭloud Point Measurement: The MP80 acts as an automatic cloud point apparatus according to the following measurement principle: The cloud point of a solution corresponds with the temperature above which a sample becomes turbid. The frequency of the bubbles is measured and is used as the basis for boiling point determination. These ascending bubbles reflect the light of the built-in light source and are detected individually. The temperature rises, and gas bubbles are formed within the liquid and escape to the surface. The sample is then inserted into the boiling point instrument, and the method is started. ![]() A smaller boiling point capillary is then inserted into the filled tube to prevent superheating of the liquid, which would induce boiling retardation and give rise to inaccurate readings. In detail, the METTLER TOLEDO MP55 and MP80 Melting Point Systems offer the possibility to perform the following applications:īoiling Point Measurement: The MP80 acts as an automatic boiling point apparatus according to the following measurement principle: To determine the boiling point, which is the temperature at which a phase transition from liquid to gas occurs, approximately 100 µL of sample is pipetted into a glass tube. On the MP80, the melting point application is extended by boiling point, cloud point and slip melting point. With the MP55, melting and slip melting points can be determined. The instrument models MP55 and MP80 can be used for diverse tasks. The substances are securely identified with two barcodes showing the filling code and lot number.įurthermore, METTLER TOLEDO offers a melting point performance verification package, called the MP VPac™, which contains prefilled and sealed capillaries for use in instrument verification.Īll melting point instruments can also measure the melting range. Each melting point reference substance comes with a certificate and both nominal pharmacopeia and thermodynamic melting points written on the label. We highly recommended that you use METTLER TOLEDO melting point standards for calibration and adjustment purposes of METTLER TOLEDO melting point instruments. The new adjustment should be checked with a different reference substance than the one used for adjustment. The calibration should be performed with at least one reference substance melting point lying within the required temperature range. The instrument should be adjusted with at least two reference substances that encompass the whole melting range required. If calibration fails, which means if the measured temperature values do not match the range of the certified nominal values of the respective reference substances, the instrument needs to be adjusted. Thus, we can compare nominal values including tolerances with actual measured values. As it is not possible to measure the sample temperature directly using a certified thermometer, the temperature accuracy is checked using reference substances, ideally with certified temperature values. ![]() If we want to make sure that the melting point analyzer is providing the correct results, we need to verify its measurement accuracy. ![]() User skills and knowledge (theory of applications, technologies, methods, tips and tricks).Time reduction quick adjustment and scalability of methods.Sustainable design (futureproof modular design long lasting).Shift to the next level measurement process (from manual to automated, or to on-line measurement automation).Reduction in operating costs Total cost of ownership Maintenance cost reduction.Productivity (released time from the team) Uptime Optimize processes.Preventive maintenance Minimize downtime.Connectivity Software solutions Data flow from one instrument to another.
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