Organo Phosphonate Test Kits

1. Fill the vial with 25 ml of sample water to be tested.
2. Add one PIT #1 Tablet and swirl to mix. Sample should be lime green.
3. Add PTS #2 Titrating Solution, drop by drop, until the water turns a permanent purple.
4. An aute blank of 4 drops must be subtracted for step 3.
5. The total phosphonate reading, in ppm, is equal to the number of drops of PTS #2 used minus 4.