Why is the PTFE shovels a ‘favourite’ in the laboratory?

PTFE (polytetrafluoroethylene) spatulas are indispensable laboratory tools because of their excellent properties. Its chemical inertness, non-stick surface and high temperature resistance make it ideal for handling and manipulating samples, dispensing liquids and cleaning surfaces.

Advantages of PTFE shovels in laboratory

1.Chemically inert, resistant to harsh chemicals and solvents:

PTFE is highly resistant to a wide range of chemicals and solvents, including acids, alkalis and organic solvents. This makes it ideal for handling corrosive or reactive substances without contamination or degradation.

2.Non-stick surface，prevents sample adhesion and ensures easy cleaning

The non-stick surface of the PTFE spatula prevents the sample from adhering to the surface of the spatula, thereby facilitating cleaning and preventing cross-contamination. This is particularly advantageous when working with sticky or viscous materials.

3.High temperature stability for use in harsh thermal conditions

PTFE has excellent thermal stability and can withstand high temperatures without melting or decomposing. This makes it suitable for use in harsh thermal conditions such as ovens or hot plates.

4.Flexibility and adaptability to access hard-to-reach areas:

PTFE spades are flexible and compliant, allowing them to be used in hard-to-reach areas or to conform to the shape of the container. This makes them ideal for collecting or transferring samples from narrow or irregular containers.

Other applications and benefits:

• Biocompatible: PTFE is biocompatible and can be used to come into contact with biological samples without causing harm.
• Antistatic: PTFE is antistatic, reducing the risk of electrostatic discharge and potential hazards.
• Long service life: PTFE shovels are durable and have a long service life, making them a cost-effective investment.

Specific applications of PTFE shovels in the laboratory

1.Sample handling and manipulation in chemical reactions

PTFE spatulas are ideal for handling and manipulating samples in chemical reactions. Its inertness prevents contamination or interference with the reaction and ensures the purity and accuracy of the results. PTFE spatulas are commonly used for the following purposes.

• Transferring solid or liquid samples between vessels
• Dispensing reagents into reaction vessels
• Mixing and stirring solutions without introducing impurities
• Scraping and collecting solids from surfaces

2.Dispensing and transferring viscous or corrosive liquids

PTFE spatulas are ideally suited for dispensing and transferring viscous or aggressive liquids. Its smooth surface minimises liquid adhesion for precise and controlled dispensing. In addition, PTFE's chemical resistance makes it compatible with a wide range of corrosive fluids, including acids, alkalis and solvents.

Mixing and stirring solutions without introducing impurities

• Homogenising mixtures
• Dissolving solids into liquids
• Preparing suspensions or emulsions

3.Scratch and clean laboratory equipment surfaces

PTFE spatulas effectively scrape and clean the surfaces of laboratory equipment. Its flexibility and non-abrasive nature allows for thorough cleaning without damaging delicate surfaces. PTFE spatulas are commonly used for

• Removing residual chemicals or solids from laboratory glassware
• Clean surfaces of analytical instruments
• Scraping dry or solidified substances from equipment

Other advantages of PTFE shovels in the laboratory

• Autoclavability: PTFE spatulas are autoclavable, ensuring their cleanliness and preventing contamination.
• Durability: PTFE is very durable and resistant to wear and tear, making PTFE spatulas long-lasting and cost-effective.
• Temperature Resistance: PTFE spatulas can withstand extreme temperatures and are suitable for use in both cold and hot environments.
• Ergonomic Design: PTFE shovels have a generally ergonomic handle design for comfort and ease of use.

Comparison with traditional shovel materials

Advantages of PTFE shovels over metal shovels

CORROSIVE RESISTANCE: Polytetrafluoroethylene (PTFE) is a highly inert material that is resistant to a wide range of chemicals, acids and alkalis. This makes it ideal for handling corrosive materials or working in harsh environments. In contrast, metal spades can corrode over time, especially if exposed to moisture or certain chemicals.

Non-Stick Properties: PTFE has a very low coefficient of friction and is therefore non-stick. This prevents the material from adhering to the surface of the spatula, thereby facilitating cleaning and reducing contamination. This property is critical in laboratory applications where cleanliness and precision are critical.

Advantages of PTFE Shovels over Plastic Shovels

Durability: PTFE shovels are much more durable than plastic shovels. PTFE is a tough, resilient material that can withstand high temperatures, impacts, and wear and tear. Plastic shovels are more prone to breakage and deformation, especially with heavy use.

Temperature Resistance: PTFE has a wide range of temperature resistance, from -270°C to 260°C (-454°F to 500°F). This makes it suitable for handling both cold and hot materials such as dry ice or molten liquids. Plastic shovels may warp or melt at high temperatures, limiting their use.

Chemical Resistance: Similar to its corrosion resistance, PTFE is resistant to a wide range of chemicals, including strong acids and bases. This makes PTFE spatulas ideal for handling reactive or hazardous materials where plastic spatulas may degrade or contaminate.

Selection and maintenance of PTFE shovels

Selection factor:

Size: The size of the spatula should be appropriate for the intended use. Smaller spatulas are suitable for handling small samples or working in tight spaces, while larger spatulas are suitable for handling larger quantities of material.

Shape: The shape of the shovel is important for a particular task. Flat shovels are good for general use, while angled shovels are designed for accessing hard-to-reach areas or scraping surfaces.

Handle Design: Handle design plays a critical role in comfort and safety. An ergonomic handle provides a comfortable grip and reduces fatigue during prolonged use. The non-slip surface of the handle ensures a secure grip, especially when working with wet or slippery materials.

Proper Cleaning and Storage Techniques

Cleaning: After use, clean the PTFE shovel thoroughly to remove any residue or contaminants. Use mild detergents and warm water, avoiding abrasive cleaners or brushes that may damage the PTFE surface.

STORAGE: PTFE shovels should be stored in a clean, dry environment away from direct sunlight or heat. Store the shovel upright or hanging to prevent deformation or damage to the handle.

**Note:Orginal information from Internet