Laboratory equipment doesn’t come cheap and for such a small device, those pipettes you buy can really cut into your budget. For this reason, it is essential that you never misuse the equipment you have. While there are a variety of different pipettes out there, here is an overview of the different kinds and how you should use them appropriately.
When accuracy is a must, volumetric pipettes are probably the tool you should turn to. Built for precision accuracy, these are often used in commercial labs and also popular within the academic community. You can find these in a wide variety of sizes with the most common ranging between one and one hundred milliliters. Knowing this, you will want to order whatever size would be most suitable to your standard lab testing needs.
While similar to volumetric pipettes, micropipettes can actually be calibrated so they obtain the most accurate measurement. In general, you will want to calibrate these instruments after every major use. Even if you don’t use them regularly, you should make sure to maintain them properly by calibrating them every couple of months.
Made for more general applications, measuring pipettes tend to be a little bit less costly than many of the other options. These have hash lines along the side of the unit to help you keep track of how much liquid it is currently holding. What makes these unique is that they can actually be used to measure various amounts of liquids at once thanks to these hash lines. In other words, it can save you some time and resources when precision is not the number one factor. Just remember, you won’t get as accurate a read as the other options mentioned above.
Mohr and Serological Pipettes
Sub-types of the measuring pipette, both Mohr and Serological pipettes are worth mentioning separately for their subtle differences. In the case of Mohr pipettes, you can keep track of it by the hash marks that go down and stop before the tip. Alternatively, serological models actually have the graduations all the way down, continuing to the tip. During experiments when you need to make sure the pipette is completely emptied afterwards, you might also want to use a serological blow-out model. These are designed with an open back like a straw, allowing you to seal it with your thumb and then blow the rest of the liquid out when you are finished.
Of course, if you shop with the right company, you will also find that there are more specialized options to choose from. For instance, you might want repeater pipettes, which will continually provide the same amount of liquid. Alternatively, multi-channel pipettes are another option you might consider.
Using All Your Equipment Properly
Knowing the different pipettes out there, it is important that you always mind their proper use when in the laboratory. Remember that testing will always work better if you use the proper tools and these pipettes will only work right if you use them as intended. So, the next time you have to perform any sort of testing or measurements, remember to grab the right tool for the job.