There are some equivalences here that are important:
1 M = 1,000 mM = 1,000,000 uM.
Therefore, 0.1 M = 100 mM = 100,000 uM.
And thus, 0.0001 M = 0.1 mM = 100 uM.
To go from 0.1 M down to 0.0001 M (which is from 100 mM down to 100
uM), you have to make a 1:1,000 dilution.
Measure 9 mL water into the graduated cylinder. Leave the water in the cylinder.
Use an eyedropper or pipette to add 1 mL of the 0.1M STOCK solution to the graduated cylinder. You will be adding STOCK solution until the total in the cylinder reaches the 10 mL line (9 + 1 = 10).
Pour the cylinder into the 1 L large container. Rinse the cylinder
into the 1 L container two or three times. Then add sufficient water
to bring the total fluid level up to 1 L. Cap and shake. Label
this container: "100 MICROMOLAR (100 uM) WORKING SOLUTION".
Measure 9 mL water into the graduated cylinder. Leave the water in the cylinder.
Use an eyedropper or pipette to add 1 mL of the 100 uM WORKING solution to the graduated cylinder. You will be adding 100 uM WORKING solution until the total in the cylinder reaches the 10 mL line (9 + 1 = 10).
Pour the cylinder into a small bottle. Cap and shake. Slowly uncap the bottle, and pour the solution back into the graduated cylinder. Repeat transfer from cylinder to bottle and back again three or four times. Make the last transfer into the small bottle, and cap securely.
Label this container: "10 MICROMOLAR (10 uM) WORKING SOLUTION".
stock (0.1 M) | dilute to: | |
100 uM working: | 0.1 mL | 100 mL |
10 uM working: | 0.1 mL | 1,000 mL |
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TO MAKE COLCHICINE STOCK SOLUTIONS
TO MAKE ORYZALIN STOCK SOLUTIONS