Silicone septa, also known as a silicone rubber septum or stopper, is a sealing component used in laboratory settings, particularly in chromatography and sample storage applications. It is a circular disc-shaped piece made of silicone rubber that is placed within the cap of a vial or container to create a secure and leak-proof seal.
Silicone septa are commonly used in conjunction with screw caps or crimp caps to seal vials used in gas chromatography (GC) and other analytical techniques. They are typically placed between the cap and the vial opening, and when the cap is tightened or crimped, the septa forms a barrier that prevents leakage or contamination of the sample.

EPA vial also known as an Environmental Protection Agency vial, is a specialized type of sample container used for environmental analysis and testing. It is designed to meet the requirements and guidelines set by the U.S. Environmental Protection Agency (EPA) for the collection and storage of water samples.
EPA vials are typically made of glass or high-quality plastic materials such as polypropylene. They come in various sizes, commonly ranging from 20 milliliters (mL) to 40 mL, although larger sizes may also be available.
The vials are often equipped with a screw cap or a snap cap to securely seal the sample inside and prevent any leakage or contamination.These vials are specifically used for the collection of water samples to be analyzed for various parameters, such as the presence of organic and inorganic pollutants, contaminants, or other substances that may impact water quality.

EPDM (Ethylene Propylene Diene Monomer) septum is a type of synthetic rubber commonly used in laboratory and industrial settings. It is primarily used as a sealing material in various applications, including as a septum for sealing sample vials or containers.
EPDM septa are often used in chromatography and analytical chemistry techniques, such as gas chromatography (GC) and high-performance liquid chromatography (HPLC). They are placed on the top of the vial or container, providing a reliable and airtight seal.
The septum allows for the injection of a needle or syringe to introduce or withdraw samples or reagents without compromising the integrity of the contents.
EPDM is favored for septa due to its excellent chemical resistance, low extractability, and ability to maintain a secure seal even under varying temperature conditions.

Headspace vials are a type of sample container used in analytical chemistry, specifically for headspace analysis. Headspace analysis involves the analysis of volatile compounds present in the gas phase above a sample. These volatile compounds are typically of interest in applications such as gas chromatography (GC) or gas chromatography-mass spectrometry (GC-MS).
Headspace vials are designed to hold the sample and create a sealed environment for the vapor phase above the sample. The vials are typically made of glass, although plastic vials are also available. The vials have a specific volume capacity, which can range from a few milliliters to several tens of milliliters, depending on the application.

Aijiren vials combine the robustness of a Glass vial with the benefits of a glass micro-insert. The glass micro-insert is firmly seated in the cone of the vial and its edges slightly exceed the rim of the vial, ensuring that the septum seals tightly to the glass.

The vial is made of colorless Class 1 A or amber Class 1 B borosilicate glass. The automatic sample vial is produced from high-quality raw materials. It has high-temperature resistance and corrosion resistance. Controlled manufacturing environment quality and service have won the trust of customers.

COD testing is a good better indicator of organic pollutants in industrial wastewater containing cyanides and heavy metals. COD testing affords rapid response to changing conditions before critical problems develop.

100ml lab glassware reagent bottle refers to a specific type of laboratory glass container designed to hold and store reagents, chemicals, or other liquids used in scientific experiments or analysis. It has a capacity of 100 milliliters, which means it can hold up to 100 milliliters of liquid.
These bottles are typically made of high-quality borosilicate glass, which is resistant to heat and chemical reactions. They often have a narrow neck and a screw cap or stopper to ensure a tight seal and prevent any leakage or contamination.
Lab glassware reagent bottles come in various sizes, ranging from small volumes like 5ml or 10ml up to larger sizes like 500ml or 1000ml. The 100ml size is commonly used when smaller quantities of reagents are needed for experiments or when space is limited.

A headspace vial is used in the process of top – gas chromatography. When detecting volatile or semi-volatile mixtures with high boiling points, we need to heat them to vaporize them at the top. In this process, since the liquid samples are at the bottom, the material in the top gas can be measured without touching the liquid in the sample vial.

Screw Cap Vials are universal. Screwing the cap applies a mechanical force that squeezes the septum between the glass rim and the cap. Screw caps form an excellent seal and mechanically hold the septum in place during piercing. No tools are required for assembly. 

The automatic vial is made of high quality raw materials. It has high temperature resistance and corrosion resistance.  Screw Glass vial For autosampler instrument is made of borosilicate glass.

Screw vials are a type of laboratory vials used for storing and transporting liquid or solid samples. They are designed with a screw cap closure system, which provides a secure seal and prevents sample leakage. Screw vials are commonly used in various scientific fields, including chemistry, pharmaceuticals, environmental analysis, and more.
On the other hand, EPA vials are a specific type of vials that comply with the requirements set by the United States Environmental Protection Agency (EPA). These vials are used for environmental analysis and are typically used for the collection and storage of water samples, soil samples, and other environmental samples.

Micro-insert, also known as a micro-insert vial or microvial insert, is a small glass or plastic container that is used in chromatography and analytical techniques to enable smaller sample volumes to be analyzed in standard-sized vials.
Micro-inserts are designed to fit inside standard-sized sample vials, which are typically larger in size. They are used when the available sample volume is limited or when the sample concentration is low. By using a micro-insert, the sample volume can be reduced, allowing for more efficient analysis and minimizing the risk of sample loss or evaporation.

Syringe filter is a small, disposable device used for filtering liquids or gases.It consists of a plastic housing with a membrane filter at one end and a female luer lock or luer slip connection at the other end, which allows it to be attached to a syringe or other fluid delivery system.
Syringe filters are commonly used in laboratory and research settings to remove particles, microorganisms, or other impurities from samples before analysis or further processing. The membrane filter in a syringe filter acts as a barrier, allowing only the desired components of the sample to pass through while retaining any larger particles or contaminants.
The choice of membrane material depends on the nature of the sample and the substances to be filtered.

HPLC autosampler vials are generally categorized based on vial diameter, vial height, and thread finish. Clear glass and amber glass have similar inert properties. Amber glass is used to protect sensitive samples from UV light. Markings on the vials help provide sample identification information. Autosampler vials can be used to inject samples from an autosampler.

EPA vials are those that meet the requirements of the US Environmental Protection Agency (EPA) for the testing of potentially harmful environmental contaminants in water or soil samples. To be used for environmental analysis, EPA vials must be clean and free of substances that might influence the analysis.

Autosampler vials are available in a variety of sizes, with 2 mL vials being the most common size. During the injection process, the autosampler needle pierces the cap and extracts the desired amount of analyte from the vial. There are different types of vials for chromatography applications.

20mm crimp-top headspace vial refers to a specific type of vial used in gas chromatography (GC) analysis, particularly for analyzing volatile compounds in samples.
Headspace vials are used in gas chromatography (GC) analysis for the determination of volatile compounds in samples.
They are designed to contain the sample and create a headspace above the sample, which is the gas phase in equilibrium with the sample.
20mm size specification refers to the outer diameter of the vial’s mouth, which is important for compatibility with the corresponding closures or caps.
The vial’s mouth is typically threaded to accept a screw cap or fitted with a crimp-top for sealing.
Headspace vials are available in various sizes to accommodate different sample volumes and instrument requirements.

reagent bottle is a type of laboratory glassware used for storing and dispensing chemicals, reagents, and other liquid substances used in scientific experiments and analysis.
It is designed to safely hold and protect the contents from contamination and evaporation.
Reagent bottles are typically made of glass, although some modern versions may be made of plastic.
Glass reagent bottles are preferred because they are transparent, chemically resistant, and can withstand a wide range of temperatures.
They are usually labeled with markings or graduations to indicate the volume of the liquid inside.

4ml autosampler vial refers to a type of small glass or plastic container specifically designed for use in autosamplers, which are instruments used in analytical chemistry. Autosamplers are used to automatically inject samples into analytical instruments, such as gas chromatographs or liquid chromatographs, for analysis.
Autosampler vials are typically made of either glass or plastic, with glass vials being more commonly used for applications that require higher chemical resistance.
They are designed to be compatible with the specific requirements of the autosampler instrument, ensuring a secure fit and reliable sample injection.