Emulsion is widely used in food, medicine, pesticide, chemical and other fields. A simple and rapid method for the determination of emulsion stability is a hot issue in the field of emulsion research. In this paper, the self-designed illuminometer method is used to study the stability of petroleum ether-water emulsification system. The main research contents and achievements are as follows:
1. An emulsion stability measurement device with an illuminometer as the detector was designed. It can be used to measure the stability of oil-in-water (0/W) and water-in-oil (W/0) emulsions, and the measurement results are consistent with those of the turbidimeter, indicating that the designed device is reliable.
2. A method for evaluating emulsion stability was established by illuminometer method. The stability of the emulsion was evaluated according to the duration of the sudden change of the transmittance intensity and the half-life of the emulsion, and the stability time of the emulsion was estimated.
3. The stability of oil-in-water (0/W) and water-in-oil (W/0) emulsions prepared by triton X-100 and SPAN-800 as emulsifiers were investigated respectively. The effects of mechanical stirring method, ultrasonic method, combined method (combined stirring and ultrasonic wave) and emulsification conditions on the stability of dairy industry were discussed. The experimental results show that, for the oil-in-water (0/W) emulsion, the best process conditions for stability are: emulsification 1515min, emulsification temperature 30oC, ultrasonic power 480W, emulsifier 1.000g The emulsion prepared by It is 5400min and the half-life is 5600min. For water-in-oil (W/0) emulsion, the best stability conditions are: emulsification 30min, emulsification temperature 30oC, ultrasonic power 240W, emulsifier 1.000g emulsion is the most stable, stable time and half-life are 3500 and 4130min respectively.
4. Explore the method of measuring emulsion stability by vertical scanning method of illuminometer. The effects of emulsification time, temperature, ultrasonic power, and emulsifier concentration on the stability of the emulsion were studied by vertical scanning. The experimental results were consistent with the measurement results of the fixed monitoring method. It provides a basis for the future development of a rapid scanning device for the determination of emulsion stability.
