Glaspipette

Glaspipette is a glass laboratory instrument used to transfer or measure small volumes of liquids. Typically made of borosilicate glass, glaspipettes can be either graduated or volumetric in design. Graduated glass pipettes carry markings along their length to indicate volume, allowing for approximate measurements and serial dilutions, while volumetric glass pipettes are designed to deliver a single, highly accurate volume when used with a bulb or aspirator.

These instruments come in a range of sizes, commonly from fractions of a milliliter up to several milliliters for many glass configurations, with calibrated variants used for precise additions of reagents in chemistry, biology, and clinical laboratories. They are used for tasks such as sample preparation, reagent addition, titration, and the preparation of dilutions. Glass pipettes require careful handling to maintain cleanliness and accuracy, and their performance can depend on technique, calibration, and temperature.

To use a glaspipette, a bulb or aspirator is attached to draw liquid, then the operator dispenses by controlled release to achieve the desired volume. Glass pipettes are fragile and must be handled with care to prevent breakage; after use they should be cleaned and stored properly, and broken glass disposed of according to safety guidelines. Calibration should be checked periodically to maintain accuracy, and maintenance procedures should follow institutional standards. See also pipette, volumetric pipette, Pasteur pipette, and borosilicate glass.