Weighing A Chemical Using an Analytical Balance Assessment
Learning Outcome #3
- Prepares reagents, standards, and solutions to industry standard for use in the clinical lab, utilizing common lab equipment according to established protocols.
Instructions
Follow the following procedure in the exact order.
Have the instructor check off each step.
| Procedural Step | Instructor |
|---|---|
| Assemble equipment and supplies. Open the side glass doors of the balance, and clean weighing pan and base with the brush provided. | |
| Analytical balances require a draft-free location on a solid bench that is free of vibrations. | |
| Before weighing, make certain the balance is properly leveled. Observe the leveling bubble and adjust the two rear balance feet that serve as leveling screws. | |
| Press the tare button to zero. | |
| Label the weigh boat with the chemical name. | |
| Place the weighing boat on the balance pan. | |
| Close the sliding doors, and press tare again. | |
| Open the doors and carefully add the substance to be weighed up to the desired mass. | |
| Close the doors until the volume is stable. | |
| Use the brush provided to clean spills in the weighing chamber. Discard any disposable containers in the bench biohazard bucket. |