Since the silent and random failures of Eppendorf Ergonomic Pipette, the most important aspect of pipette quality control is to maintain a calibration frequency with sufficient reliability. Here are the step-by-step guidelines for you to use.

• 1.Gravimetry is a calibration technique in which the weight of a liquid is measured on an analytical balance. However, this method will hinder frequent calibration because the calculation is time-consuming and cumbersome, especially for multi-channel instruments. Gravimetry also requires a controllable environment to work properly, because it is affected by evaporation, static electricity, and vibration, especially when measuring small volumes.

• 2.Single dye photometric calibration measures the absorbance of the dye solution at a given wavelength to verify the liquid volume. This technique is less affected by the environment and evaporation, which makes the photometry a distinct advantage at lower volumes.

• 3.Ratiometric photometry is another calibration method. This patented technology relies on two dyes for more precise volume measurement, especially for low volume measurement.

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