Viscometers are also widely used in the research and development of drugs, especially in the formulation design of some ointments and injections. Different formulations result in different rheological properties of drugs, which has a significant impact on the production and use of drugs.
In Part II (Western Medicine) of the Chinese Pharmacopoeia, requirements are put forward for viscosity control of some agents. For example, in Appendix IF, humectant, preservatives, thickening agents, antioxidants and transdermal enhancers can be added to ointment and cream as required. Ointments and creams should have appropriate viscosity, and pastes generally have a higher consistency. But it should be easy to apply to the skin or mucous membrane, not melting, and the viscosity should change very little with the season. In Appendix IG (eye preparation), Appendix IQ (ear preparation), Appendix IR (nasal preparation) and Appendix IU (gel preparation), it is also required that the viscosity of the above preparations should be adjusted as required.
The ST204C fully automatic dual-purpose drug kinematic viscometer is designed and manufactured strictly in accordance with the general principles 0633 of the 2020 Chinese Pharmacopoeia, including the first method for measuring Pinot's capillary viscosity and the second method for measuring Ubbelohde's capillary viscosity. The automatic mode has a series of fully automatic functions such as automatic constant temperature, automatic extraction, automatic timing, automatic calculation, automatic printing, automatic cleaning, and automatic drying. When in use, only one click to start the sample injection can complete the experiment.
Technical performance parameters:
Compliance standard: General Rule 0633 of the 2020 Chinese Pharmacopoeia
Temperature measurement range: 5-100 ℃ (with refrigeration);
Temperature control accuracy: 0.1 ℃
● Display method: Adopting a human body sensing touch screen
● Operation process: Automation of the entire process of placing samples at constant temperature, testing, calculation, viscosity tube cleaning, drying, and printing report forms
Viscosity tube fixture: Made of all 304 stainless steel material, with high and low temperature resistant graphite sliding bearing device
Equipped with LED soft light, with uniform light filling for easy observation.
Measurement range: Ubbelohde viscosity measurement range: 0.6-1000mm2/s
Pinot viscosity measurement range: 0.6-1700mm2/s
