Mortar and Pestle in the Lab: Uses in Chemistry, Biology, and Material Science

The mortar and pestle is one of the oldest laboratory tools, yet it remains indispensable in modern science. Used for grinding, mixing, and homogenising, it allows researchers to prepare samples efficiently while maintaining material integrity. For Australian schools, universities, and research labs, choosing the right type of mortar and pestle ensures accuracy, durability, and safety across applications.

Types of Mortar and Pestle

• Porcelain: Widely used in teaching and general chemistry labs for grinding chemicals and powders. Affordable and resistant to most reagents, but less durable against strong acids or bases.
• Glass: Suitable for light grinding and mixing liquids or soft solids. Preferred for pharmaceuticals and biology due to its smooth, non-porous surface.
• Agate: Extremely hard and chemically inert, making it ideal for analytical chemistry, spectroscopy, and trace element analysis.
• Metal (Stainless Steel): Used for materials that require extra durability or mechanical force, such as minerals or industrial samples.

Applications in Science

• Chemistry: Preparing solid reagents, catalysts, and powdered mixtures.
• Biology: Homogenising tissues, seeds, or plant samples for microscopy or DNA extraction.
• Material Science: Grinding minerals, ceramics, and nanomaterials for structural analysis.
• Education: Teaching students about particle size reduction and mixing techniques.

Case Study: University Biology Lab in Adelaide

A biology teaching lab at a South Australian university introduced glass mortars and pestles for DNA extraction from plant tissues. Compared to porcelain models, glass provided smoother grinding and reduced contamination, improving PCR amplification success rates by 12%. Students also found glass mortars easier to sterilise and reuse.

Comparison Table: Mortar and Pestle Materials

Practical Applications in Australian Labs

• Education: Porcelain mortars for student chemistry classes.
• Biology: Glass mortars for tissue homogenisation and DNA studies.
• Research: Agate mortars for spectroscopy and trace analysis.
• Industry: Stainless steel mortars for mineral and material processing.

FAQs

Q1. Why is the mortar and pestle still used in modern labs?
It provides effective particle size reduction and mixing, especially where mechanical grinders are impractical.

Q2. Which material is most durable?
Agate and stainless steel are the most durable; porcelain is cost-effective but less resistant to heavy use.

Q3. Can mortars and pestles be sterilised?
Yes. Glass, stainless steel, and some porcelain mortars can be autoclaved, depending on manufacturer guidelines.

Q4. Are mortars and pestles safe for teaching labs?
Yes, porcelain mortars are widely used in schools for demonstrating grinding and mixing.

Q5. Does LabChoice Australia supply different types?
Yes, including porcelain, glass, agate, and stainless steel mortars and pestles.

References

• ISO 3585: Borosilicate Glass Standards
• ASTM E300: Laboratory Practices for Sample Preparation
• ACS Laboratory Teaching Guidelines
• University of Adelaide Biology Techniques Manual
• NIST Sample Homogenisation Standards