What are some facts about pipettes worth understanding?
There are many kinds of pipettes available for use in the clinical laboratory, each intended to serve a specific function. In general, pipettes fall into two classes, volumetric pipettes and graduated pipettes. The volumetric pipette is calibrated for one specified volume measurement, either to deliver (TD) or to contain (TC). This distinction is clearly indicated on the pipette. A to deliver pipette calibrated for blowout has an opaque ring near the top. In this case the small amount of liquid remaining in the tip after free delivery has stopped is blown out and added to the initial volume. To deliver pipettes are calibrated for the volume delivered, with no attempt to wash out the film which adheres to the inside glass surface. To contain pipettes are calibrated for the total volume of liquid held in the pipette, and must be washed out completely for delivery of the correct volume. Most micropipettes, in the range up to 0.5 ml, are calibrated to contain. Graduated pipettes are long,
There are many kinds of pipettes available for use in the clinical laboratory, each intended to serve a specific function. In general, pipettes fall into two classes, volumetric or transfer pipettes and graduated or measuring pipettes. The volumetric pipette is calibrated for one specified volume measurement, either to deliver (TD) or to contain (TC). This distinction is clearly indicated on the pipette. A to deliver pipette calibrated for blowout has an opaque ring near the top. In this case the small amount of liquid remaining in the tip after free delivery has stopped is blown out and added to the initial volume. To deliver pipettes are calibrated for the volume delivered, with no attempt to wash out the film which adheres to the inside glass surface. To contain pipettes are calibrated for the total volume of liquid held in the pipette, and must be washed out completely for delivery of the correct volume. Most micropipettes, in the range up to 0.5 ml, are calibrated to contain. Grad
