For many industries, thermal analysis technology is not unfamiliar. According to the definition of the International Thermal Analysis and Calorimetry Association (ICTAC), it refers to a series of physical properties of test substances that change with temperature under a controlled temperature program. Technology, this definition is concise, and any analysis involving samples that need to be analyzed in a changing temperature environment can use thermal analysis technology, which is widely used in industries such as aircraft, rubber tires, plastics, coatings, and electronics.

Among them, the pharmaceutical industry is also a very important application field. The thermal analysis techniques often used in drug research and development include differential scanning calorimetry DSC technology, thermogravimetric analysis TGA technology, and combined use of infrared and mass spectrometry based on this. The applications involved include the detection of physical effects such as melting, crystallization, glass transition, melting enthalpy, vaporization, drying, adsorption, and desorption. These are thermal effects often measured in the pharmaceutical industry, in addition to some chemical changes. , Such as analysis of decomposition, oxidation and stability during degradation reaction, dehydration, etc.

For the food industry, the application of thermal analysis is gradually expanding, such as the measurement of the oxidation temperature of oils and fats, the gelatinization of starch, the melting of chocolate, etc. are already frequently used analysis methods. Next, we enumerate some application cases to hope to be able to Help everyone reference and master.

Case

1. DSC "fingerprint" of water-in-oil cream

Fatty acid esters and mono-, di-, triglycerides and other non-active ingredients used in the manufacture of water-in-oil creams can form three-dimensional structures of different types and strengths due to the addition of water.

Upon heating, the components melt or undergo a unique transformation, resulting in a DSC curve specific to the specific mixture. >> Read more

2. Glass transition and moisture content of hydroxypropyl methyl cellulose phthalate (HPMC-PH)

Cellulose-based polymers are easy to absorb water, and the amount of water absorption depends on storage conditions. Anhydrous samples are usually used to determine the glass transition temperature (Tg), which is obtained by calculating the second heating curve. If it is necessary to polymer with different moisture content To determine the glass transition temperature, a sealed crucible must be used. >> Read more

3. Melting of chocolate

The quality, process parameters and composition of the chocolate raw materials affect the shape of the DSC melting curve. Through the analysis of the DSC curve, you can understand the process and quality judgment in the manufacturing process. >> Read more

Mettler-Toledo has produced the world's first commercial TGA since 1964, and has nearly 50 years of professional thermal analysis manufacturing and application experience. In technology, we always maintain the leading technology, which can completely separate latent heat And sensible heat TOPEM technology, fast flash DSC technology that can quickly rise and fall temperature and non-model dynamics software that can predict material behavior, etc. In application, we continue to expand and explore in depth from the perspective of industry and users, design A series of perfect practical experimental schemes.

Improving user research and quality control of materials In order to benefit more technical researchers engaged in thermal analysis, we have compiled a large number of application cases into a volume of "Thermal Analysis Application Manual Series" by industry, and the sub-volumes include "thermosetting resin", " "Thermoplastic Polymer", "Elastomer", "Evolved Gas Analysis", "Basics of Thermal Analysis Application" and "Drugs and Food" This special issue we have taken some cases from the "Drugs and Food" volume to introduce to you Friends who are interested in books or other volumes can click on the icon information to check the purchase.

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