Lugol’s Iodine preparation

Lugol’ iodine is mostly used in wet preparation of the stool.
Ingredients are:
- Iodine powder = 5 grams.
- Potassium iodide = 10 grams.
- Distilled water = 100 mL.
Procedure:
- Dissolve the potassium iodide in the distilled water.
- Add slowly iodine crystals and keep on shaking the container (test tube), until these are dissolved.
- Filter the resulting solution.
- This is the stock solution
- For the working solution:
- Dilute the stock solution 1:5 with the distilled water.
- You can use this working solution for 2 to 3 weeks and after that make a new working solution.
Important note:
When the iodine crystals disappear from the bottom of the bottle, the stock solution is no longer to be used.
Now you need to replace the working solution.