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Pour sample into the mortar and grind the sample with the pestle. When finished, the sample should be the consistency of talc powder. Test the sample by taking a pinch and rubbing it on your skin. If the sample feels gritty, it needs to be ground more. If the texture is good and the sample looks homogenous, you can pack the sample into a sample holder to be placed in the D4.
Mixer millMills
There The follow instructions are for two mixer mills, Spex and the Newer Retsch MM400. Currently the Retsch MM400 is the recommended mixer mill to use and it is located in X-Ray Prep . Both mills operate very similarly but do have slight differences (Figure 9; Figure 10). The 8000 is featured on the top and the 8000M on the bottom.or MBIO area of Chem lab.
Figure 9: 8000M mixer mill. (A) Safety latch (B) Minute timer (C) Seconds timer (D) Start button (E) Pause/Stop button (F) Timer countdown LCD display.
Figure 10: 8000 mixer mill. An older simplified version of the 8000M. Featured are the safety latch, timer dial, and start/stop button in the middle of the dial.
The main difference between the two mixer mills is the timer. The 8000M timer uses 2 buttons to adjust the minutes (Figure 9B) and seconds (Figure 9C), 2 separate buttons to start (Figure 9D) and manually stop (Figure 9E), and counts down time on the LCD display (Figure 9F). To operate the 8000 mixer mill, turn the knob to the desired time and press the "Start" button in the middle. That button will also stop the mixer mill. The dial does not move automatically, so if it is turned to 5 minutes it will stay there. The dial does not need be set back to 0 to work.
Grinding Vessels
There are three types of grinding vessels available for the 8000 mixer mill: alumina ceramic, tungsten carbide, and hardened steel (Figure 11). Tungsten carbide and steel vessels are better for more robust grinding, and alumina ceramic is better for minimizing contamination. Check with the Science Party to see which vessel type is preferred.
Grinding Vessels
There are three types of grinding vessels available: alumina ceramic, tungsten carbide, and hardened steel (Figure 11). Tungsten carbide and steel vessels are better for more robust grinding, and alumina ceramic is better for minimizing contamination. Check with the Science Party to see which vessel type is preferred.
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