Tennessee Wastewater Operator Practice Exam

What should be done first when a lab receives a new pipette?

1. Calibrate the pipette

2. Dip them in acid

3. Inspect for any defects

4. Wash with distilled water

The correct answer is: Dip them in acid

When a laboratory receives a new pipette, the first step in ensuring its proper functionality and accuracy is to inspect it for any defects. This entails checking for any physical damage, such as cracks, chips, or other imperfections that could affect its performance. A pipette that has defects cannot deliver accurate liquid volumes, which is essential for any analytical procedures. Furthermore, conducting a thorough inspection ensures that you can identify any manufacturing flaws or damages incurred during shipping. If defects are found, it is advisable to address them before the pipette is calibrated or used, as calibration will not compensate for a damaged instrument. Proper care during this initial phase helps maintain the integrity of the laboratory results and the overall reliability of the pipetting process. While calibration, cleaning, and even acid washing may be necessary steps later on, the priority lies in ensuring that the pipette is free from defects to guarantee the quality and accuracy of the measurements to be undertaken with it.