Micromeritics Gemini VII 2390a, Operator'S Manual

Page: 53 / 426

Gemini VII Preparing for Analysis
239-42828-01 - Dec 2012 3-17
Cleaning and Labeling Sample Tubes
Sample tubes and filler rods must be clean and dry before samples are added and weighed. The follow-
ing table indicates which materials are supplied by Micromeritics and which are supplied by the user.
The procedures following the table are recommended.
1. Preheat drying oven at 110 ºC.
2. Verify that the ultrasonic cleaning unit is clean.
3. Use 5 grams of Alconox (or other suitable detergent) per 500 mL of warm water and fill the
ultrasonic unit with enough water to cover the sample tubes and filler rods (if used). Ensure the
detergent is dissolved before placing the sample tubes and filler rods into the water. If too much
detergent is used, it may be difficult to rinse from the sample tubes.
4. Fill the sample tubes with warm water and place them in the ultrasonic cleaning unit. Then place
the filler rods in the unit. Turn on the ultrasonic cleaning unit for approximately fifteen minutes.
Materials Supplied by Micromeritics Materials Supplied by User
• Sample tube
• Filler Rod (if used)
• Sample tube brush
• Stopper for sample tube
• Sample tube rack
• Sample weighing support
• Sample data worksheet (copied from Appendix A
of this manual)
• Drying oven
• Ultrasonic cleaning unit
• Detergent
• Rubber gloves or lint-free cloth
• Acetone or isopropyl alcohol
• Safety glasses
• Waste container
• Analytical balance
• Pipe cleaners