Are test tubes made of glass?
Yes, test tubes are commonly made of glass, specifically borosilicate glass, which is known for its durability and resistance to thermal shock.
What are the common sizes of test tubes?
Test tubes come in various sizes, ranging from small microcentrifuge tubes with volumes of a few milliliters to larger volumes of 50-100 milliliters. The standard sizes are 13x100mm, 16x100mm, and 18x150mm.
Can test tubes be used for heating substances?
Yes, test tubes made of borosilicate glass are heat-resistant and can be safely used for heating substances over a Bunsen burner or in a water bath.
How do I clean test tubes?
Test tubes should be cleaned with warm soapy water or a laboratory detergent. Stubborn residues can be removed using a brush or pipette cleaner. Ensure thorough rinsing before reuse.
Can test tubes be reused?
Yes, test tubes can be reused after thorough cleaning and sterilization. It is important to ensure they are free from any residues or contaminants before reuse.
Are test tubes autoclavable?
Many test tubes made of borosilicate glass are autoclavable, which means they can withstand sterilization in an autoclave. However, it is essential to check the specific product's autoclavability before subjecting it to high temperatures and pressure.
Do test tubes come with caps or stoppers?
Some test tubes come with caps or stoppers, while others may require separate purchase. It is important to check the product description or inquire with the supplier to ensure the availability of caps or stoppers.
Can test tubes be used for storage?
Yes, test tubes are commonly used for storage purposes, especially for small quantities of liquid or solid samples. They can be capped or sealed with stoppers to prevent contamination or evaporation.