Most glass sample vial can be kept intact at a temperature of -4°C. At room temperature, short-term storage of test samples does not require any special precautions and can be stored in glass sample vial containing organic solvents at temperatures as low as -80°C. However, the special use of bottle caps made of polypropylene. Because these materials will become more and more brittle when the temperature is lower than 0°C. The following are some principles for freezing glass sample vial:
Storage glass sample vial
When using it as a storage bottle, the most important thing is to avoid direct sunlight. It is best to put it on a plastic bottle rack during storage and thawing.
In the process of thawing many liquids, especially when the sample contains a large amount of water, it will exert considerable pressure on the closed container and may cause it to rupture. Therefore, when storing liquid samples at low temperatures, the sample cannot fill the entire container.
At extremely low temperatures, bayonet bottles are not recommended. glass sample vial used at low temperatures should have a larger internal volume and a smaller opening. Such as screw thread top sample vials and a transparent crimp top sample vials. A large opening bottle with good results should be used. However, the operating precautions must be followed, and a closed top cover or adhesive diaphragm should be used to open the top cover.
When the glass vial is stored for a long time at a low temperature, it is recommended to crimp and seal or top-fix the screw cap.
Thaw frozen glass sample vial
Frozen bottles must be extremely careful. Under normal circumstances, when a glass sample vial is exposed to an environment with rapid temperature changes, glass sample vial will crack (especially brown bottles). So don’t put the cold bottle in a warm place, and avoid impact. The vial possibility of damage, if you put it on top of a metal object.
It should be noted that the temperature of the bottle will gradually approach the temperature of the external environment. In addition, when the temperature inside the bottle is not the same as the outside temperature, it is best not to touch or hit it.
Warm tonic frozen glass sample vial
The glass sample vial should be allowed to warm up gradually, and the warm glass bottle should avoid sudden changes in temperature. It is not recommended to use a water bath, hot water tank, oven, or other high-temperature heat sources to warm glass sample vial. It is most reasonable to defrost the glass sample vial slowly at room temperature by heat conduction. glass sample vial with a temperature lower than -20°C should be placed in a refrigerator at -4°C to 0°C. This can reduce the possibility of damage to the glass sample vial.
PTFE/silicone rubber septum
Used to block items with a temperature lower than -40°C. When the temperature drops to -80℃, the PTFE/silicone rubber septum still maintains a good seal, but it must be noted that the bottle cap should not be tightened too much. The cap should be tightened without any significant deformation of the septum. Please note that the temperature range we release for PTFE/silicone rubber septa is above -40°C. This range refers to the temperature at which the water solidifies without destroying the bottle.