The cleanliness of sample vials influence the measurement consequence, so if you want to re-use the sample vials, it’s important to make the sample vials clean.
1. Rinse several time with tap waters.
2. Place sample vials in a beaker filled with pure water and ultrasound for 15 minutes.
3. Change the water, ultrasound for 15 minutes again.
4. Soak in a beaker filled with anhydrous ethanol.
5. Finally, remove and air dry.
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