How do you read and set a micropipette

Micropipettes are indispensable tools in laboratories and research settings, enabling accurate and precise liquid handling for a myriad of applications. Whether you're a seasoned scientist or a novice researcher, understanding how to properly set and read micropipette volumes is essential for reliable experimental results. In this article, we will guide you through the step-by-step process of setting and reading micropipette volumes like a pro.
Step 1: Familiarize Yourself with the Micropipette
Before you start using a micropipette, it's crucial to understand its components. A typical micropipette consists of a plunger button, a volume adjustment dial, a tip ejector, and the tip itself. Each component plays a vital role in accurately transferring the desired volume of liquid.
Step 2: Set the Desired Volume
Adjustment Dial: Rotate the volume adjustment dial to set the desired volume. Make sure to set it to the volume specified by your experimental protocol.
Volume Lock: Some micropipettes have a volume lock to prevent accidental changes in the set volume. Engage the volume lock if your micropipette has one.
Step 3: Attach a Tip
Select a compatible pipette tip that corresponds to the set volume. Gently press the micropipette down onto the tip, ensuring a secure attachment.
Step 4: Aspirate the Liquid
Plunger Button: Depress the plunger button down to the first stop to aspirate the liquid into the tip. Make sure the tip is fully immersed in the liquid.
Slow Release: Gradually release the plunger button to the original position. This will create a seal and hold the liquid in the tip.
Step 5: Dispense the Liquid
Position the tip at the desired destination for liquid dispensing.
Plunger Button: Depress the plunger button to the first stop to begin dispensing the liquid. To fully dispense the liquid, depress the plunger to the second stop.
Eject Tip: After dispensing, press the tip ejector button to safely remove the used tip.
Reading the Volume Display
Most micropipettes have a digital volume display that indicates the set volume. Read the volume display carefully, ensuring that you have set and aspirated the correct volume. Some micropipettes have a separate decimal point indicator, so be attentive to both the main digits and the decimal point.
Tips for Accurate Pipetting:
Pre-Wet Tip: Before aspirating the liquid, pre-wet the tip by aspirating and dispensing the liquid once without touching any surface.
Consistency: Maintain a steady and consistent speed while depressing and releasing the plunger to ensure accurate volume measurement.
Avoid Air Bubbles: To prevent air bubbles, always keep the tip submerged in the liquid while aspirating, and dispense liquid against the container wall to avoid bubble formation.
Calibration: Regularly calibrate and maintain your micropipettes according to manufacturer guidelines to ensure accurate volume delivery.
Conclusion
Mastering the art of setting and reading micropipette volumes is a fundamental skill for any researcher or scientist. By following the step-by-step process and adhering to best practices, you can confidently handle micropipettes and ensure precise liquid transfers in your experiments. Accurate pipetting not only enhances the reliability of your results but also contributes to the overall success of your scientific endeavors.