Tilavuuslasit

Tilavuuslasit, often translated as volumetric flasks, are essential pieces of laboratory glassware used for preparing solutions of precise concentrations. They are characterized by a single, etched graduation mark on their long, slender neck, indicating a specific volume when filled to that mark. The design minimizes errors associated with variations in liquid surface tension and parallax, making them ideal for accurate dilutions and standard preparations.

These flasks come in various sizes, ranging from a few milliliters to several liters, each calibrated to contain a precise volume at a specific temperature, typically 20°C. The material used in their construction, usually borosilicate glass, ensures chemical resistance and thermal stability, preventing contamination and deformation. When using a tilavuuslasi, the solvent is added until the bottom of the meniscus aligns with the calibration mark. Thorough mixing is crucial to ensure homogeneity of the solution.

Tilavuuslasit are indispensable in analytical chemistry, where precise measurements are paramount for accurate quantitative analysis. They are used in titration, gravimetric analysis, and the preparation of calibration standards for various analytical instruments. Their specific design and calibration make them more accurate for preparing solutions of a specific concentration than graduated cylinders or beakers, which are designed for approximate volume measurements.