Detailed Introduction And Material Of Sample Vials
The linear expansion coefficient refers to the change in the length of the glass every time the temperature changes. The lower the linear expansion coefficient, the greater the temperature change that the glass can withstand. The classification of laboratory glass is based on the water resistance of the USP (United States Pharmacopoeia).
USP TYPE 1, Grade A, 33 Borosilicate Hydrochloride Glass
The glass with the most inert chemical properties is widely used in laboratories, especially for chromatographic analysis. Grade I glass is mainly composed of silicon and oxygen, contains trace amounts of boron and sodium, its dissolution is the lowest, and the linear expansion coefficient is
USP TYPE 1, Class B, 51 Borosilicate Hydrochloride Glass
It is mainly composed of silicon and oxygen and contains trace amounts of boron, sodium, and more alkali metal than Grade A glass, but it can still meet laboratory use. All brown glass is Grade B glass and its linear expansion coefficient is 51.
Silylated or deactivated glass
The borosilicate hydrochloric acid glass deactivated by organo-silanization of the glass has a strong hydrophobicity and inertness on the glass surface. It is suitable for PH-sensitive compounds, trace analysis, and long-term sample storage.
Screw thread top sample vials
Provides bottom evaporation, the reusable sealing method that is less harmful to the hand than the jaw cover, and does not require additional tools. The screw cap sample vial is distinguished by different thread specifications, which is specified by the Glass Packaging Association (GPI) Definition, the composition of the screw thread sample vial, such as 9-425 sample vial, the outer diameter of the thread of the bottle is about 9mm, the type of thread is 425, and the screw thread sample vial and cap septa are more expensive than the crimp sample vial.
Septa and cap for screw thread sample vials
There is an opening cover designed for automatic injection, a solid cover designed for sample storage, and an optional PP cover. This pierceable threaded cover is designed for a single injection and does not require cover pad assembly, which can save experiments Preparation time.
Crimp top sample vials
It is relatively cheap to seal with aluminum cover. When clamped correctly, it can be used for long-term storage to provide the best seal. The jaw cover requires a relatively large force and is not reusable.
A capping device is required for sealing and a cap opener is used to remove the sealing cap. Sealer and cap opener suitable for different specifications of aluminum caps, including adjustable precision capping device to choose from, adjustable manual capping device provides an adjustable stop point on the handle, which can guarantee each pressing The tightness of the cover is consistent.
Adjusting the screws in the metal jaws can change the depth of the jaws. The correct depth of the jaws is important because too tight the jaws can cause the septum to deform to the center, damaging the needle and Teflon and the jaws in the correct position Large holes, too loose jaws will cause the septum to fall or the sample to evaporate.
The manual capping device can remove the aluminum cover safely and quickly with just one grip. The design of the cap opener is similar to pliers, providing an economical choice when the sample contains harmful substances, the cap opener is needed because the use of the cap opener is not easy to cause leakage.
Snap top sample vials
Because the bottle mouth is thick, it will not be damaged when the cap is opened. It can be used with the bayonet cap or the bayonet cap. No tool is required when using the bayonet cap. Because its tightness is not as good as the screw thread sample vial of the jaws, it is recommended for short-term sample storage or non-volatile samples.