1. A plastic buckle must be used to clamp the round bottom flask and the glass piece;
2. The heating tank must be powered on before heating to avoid dry burning; The liquid level in the tank should not be too high to prevent water from overflowing;
3. Before use, turn on the water bath to control the temperature and preheat it in advance;
4. When steaming samples, the blank sample should be steamed first, and finally the spiked quality control sample should be steamed. The joint of the steaming bottle should be rinsed once for each sample steamed to prevent cross contamination of the sample;
5. The speed setting is reasonable. If the speed is too fast, there may be air leakage or backflow, while if the speed is too low, it will affect work efficiency;