Rotary evaporator Manufacturer and supplier
In order to clarify the influence of the temperature of the water bath on the decompression and concentration effect of the rotary evaporator, and realize the precise control of the temperature of the water bath, the water bath temperature control system of the equipment was modified.Take phthalate ester analysis to detect the recovery rate as an indicator, analyze the influence of the transformation of the rotary evaporator on the effect of reduced pressure concentration.The results show that when the control temperature is set to 40°C, the actual temperature of the concentrated liquid of the rotary evaporator after the transformation changes from 26°C to 41°C before the transformation to 39°C to 41°C, and the average temperature changes from about 30°C to about 40°C;After the transformation, the recovery rate of PAEs increased from 72.4% to 85.6% to 93.2% to 98.5%.Experiments show that temperature has a greater impact on the effect of reduced pressure concentration, and the recovery rate of phthalate ester analysis and detection has been improved through the transformation of the water bath temperature control system.
Rotary evaporators are mainly used for continuous distillation of volatile solvents under reduced pressure, and are widely used in pharmaceutical, biological, chemical, chemical and other fields.The basic principle of the instrument is to continuously distill a large amount of volatile solvents under reduced pressure. It is suitable for reflux operation, rapid evaporation of large amounts of solvents, concentration of trace components and reaction processes that require stirring.For a long time, the use of this equipment has mainly relied on the operating experience of experimenters, and there is no relevant product standard to strictly control the technical parameters of the instrument.In the actual process, the solvent evaporation speed and collected sample recovery rate in the vacuum distillation process are easily affected by factors such as the temperature of the water bath, the degree of vacuum, the condensation efficiency, and the rotation speed.Especially the temperature of the water bath, for some chemical experiments that require precise control, such as the pretreatment of low concentration or even trace chemical sample content detection, the process of recrystallization and purification of synthetic drugs with extremely high temperature sensitivity, the accuracy of content detection results, the synthesis of drugs Rates, etc. will have a great impact and require precise control.
Phthalates (PAEs) are environmental hormone compounds that have certain reproductive toxicity and endocrine disrupting effects.The pre-treatment vacuum concentration test process of PAEs content detection in water was selected. In order to ensure the precise control of the temperature in the vacuum concentration process, the water bath temperature control system of the equipment was modified according to the working principle of the rotary evaporator.Taking the sample recovery rate as an indicator, the effect of temperature control on vacuum concentration was studied.
