Introduction

Mobile phase reservoir bottles are commonly used in HPLC, UHPLC, and LC-MS laboratories for solvent storage, mobile phase preparation, reagent handling, and buffer preparation. Occasionally, laboratories may need to heat solutions directly in these bottles during sample preparation or mobile phase preparation procedures.

Whether a bottle can be safely heated depends largely on the bottle construction and whether the bottle includes a protective safety coating.

Heating Non Coated Borosilicate Glass Bottles

Non-coated borosilicate glass mobile phase reservoir bottles can be used on a laboratory hot plate when proper laboratory practices are followed.

Borosilicate glass is widely used in laboratory environments because it offers:

• Excellent thermal stability
• Good resistance to thermal shock
• Broad chemical compatibility
• Suitability for many laboratory heating applications

For example, these bottles may be used to heat aqueous solutions such as water to its boiling point under controlled conditions.

Important Precautions During Heating

While borosilicate glass can tolerate elevated temperatures, several important precautions should always be observed.

Do Not Allow Liquids to Evaporate Completely

When heating solutions, the liquid should not be allowed to boil away completely.

If the bottle is heated after all liquid has evaporated:

• Excessive localized heating may occur
• Thermal stress may increase
• Glass damage may result

Maintaining an adequate liquid volume throughout the heating process helps reduce these risks.

Avoid Rapid Temperature Changes

Sudden temperature changes can place unnecessary stress on laboratory glassware.

For example:

• Do not add cold or cool liquid to a bottle that is already being heated.
• Avoid rapid heating or cooling cycles whenever possible.

Large temperature differences can increase the likelihood of glass breakage and liquid splashing.

Follow Laboratory Safety Procedures

All heating operations should be performed according to:

• Laboratory Standard Operating Procedures (SOPs)
• Institutional safety policies
• Equipment manufacturer recommendations

Proper laboratory safety practices should always take precedence over general guidance.

Safety Coated Bottles Are Different

This guidance does not apply to safety-coated mobile phase reservoir bottles.  Safety-coated bottles have different construction characteristics and should not be heated on a hot plate or subjected to elevated-temperature heating conditions.

Before heating any bottle, confirm whether the bottle is:

• Non-coated borosilicate glass
• Safety-coated glass

Using the correct bottle type for the intended application helps maintain both safety and product performance.

• Non-coated borosilicate glass mobile phase reservoir bottles suitable for many laboratory solvent preparation and heating applications when used according to established laboratory safety procedures.

• View Mobile Phase Reservoir Bottle Specifications and Ordering Information

   

Applications

Non-coated mobile phase reservoir bottles are commonly used for:

• HPLC mobile phase preparation
• UHPLC solvent preparation
• LC-MS solvent handling
• Buffer preparation
• Reagent preparation
• Laboratory solution heating
• Analytical chemistry workflows

Their borosilicate glass construction provides durability and thermal resistance for many laboratory applications.

Conclusion

Non-coated borosilicate glass mobile phase reservoir bottles can be heated on laboratory hot plates when proper precautions are followed. Users should avoid allowing solutions to evaporate completely, prevent sudden temperature changes, and follow all laboratory safety procedures. Safety-coated bottles should not be heated and require separate handling considerations.