What is the correct way to use a high pressure sterilizer

I believe that many people must have used pressure cookers in their daily lives. The role of pressure cookers is very important. It can help us press out more tender food. The porridge made in a pressure cooker will be very rich and have a very mellow essence. What is common on the market now is the high-pressure sterilizer, which can not only ensure the freshness of food ingredients, but also achieve the effect of sterilization and disinfection. It will be safer and healthier to eat, so you should understand how to use the high-pressure sterilizer and its specific functions.

1. How to use the high pressure steam sterilizer

(1) Add an appropriate amount of water to the outer pot, place the items to be sterilized into the inner pot, cover the pot and tighten the screws symmetrically.

(2) Heat the pot to generate steam. When the pressure gauge pointer reaches 33.78 kPa, open the exhaust valve to discharge the cold air. At this time, the pressure gauge pointer drops. When the pointer drops to zero, close the exhaust valve.

(3) Continue heating, the steam in the pot increases, and the pressure gauge pointer rises again. When the pressure in the pot increases to the required pressure, reduce the fire power. According to the characteristics of the sterilized items, keep the steam pressure at the required pressure for a certain period of time, then cut off the power or fire of the sterilizer, let it cool naturally, and then slowly open the exhaust valve to exhaust the remaining gas before opening the lid to take out the items.

2. Precautions for high pressure steam sterilizer:

(1) Items to be sterilized should not be placed too tightly.

(2) The cold air must be fully exhausted, otherwise the temperature in the pot will not reach the specified temperature, affecting the sterilization effect.

(3) After sterilization, do not release air or reduce pressure, otherwise the liquid in the bottle will boil violently, wash away the stopper and overflow, or even cause the container to burst. The lid can only be opened after the pressure inside the sterilizer drops to the same level as the atmospheric pressure. Also known as: autoclave, autoclave, high pressure steam sterilizer, hand-held autoclave, hand-held autoclave, portable autoclave, portable autoclave, portable high pressure steam sterilizer, portable high pressure steam sterilizer

(4) The cotton plugs of test tubes or bottles containing culture medium should be wrapped with oiled paper or kraft paper to prevent condensation water from entering.

(5) In order to ensure the sterilization effect, the sterilization effect should be checked regularly. The commonly used method is to place sulfur powder (melting point is 115°C) or benzoic acid (melting point is 120°C) in a test tube and then conduct a sterilization test. If the above substances melt, it means that the temperature inside the high-pressure steam sterilizer has reached the requirement and the sterilization effect is reliable. You can also stick a piece of adhesive tape (with a temperature-sensitive indicator) for testing the effectiveness of the sterilizer on the outer packaging of the items to be sterilized. If the indicator on the adhesive tape changes color, it also means that the sterilization effect is reliable.

(6) There are now microcomputer-controlled high-pressure steam sterilizers. After the cold air is turned off, the instrument can automatically maintain a constant pressure and time. When the time is up, it will automatically cut off the power and sound a whistle. It is very convenient to use.

3. Application of high pressure steam sterilizer:

It is the most commonly used sterilization method. Generally, it is treated at 101.33kPa for 15 to 20 minutes to achieve the purpose of sterilizing items. All items that are resistant to high temperature and moisture, such as commonly used culture media, physiological saline, clothes, gauze, glassware, etc. can be sterilized by this method.