[christyf5]

1.Fill small measuring vial to the top with water to be tested.

2. Pour sample water into large titration vial
3. Titrate with reagent by adding one drop ata time to titration vial and swirling to mix. Initial color should be blue. Continue adding drops until sample color turns to yellow-green. If the sample turns yellow after first drop, proceed to high precision test directions
4. Divide the number of drops by 2 to obtain milliequivalents per liter (meq/L) of alkalinity.

High precision method for high precision salt water testing or fresh water use:
1.Fill small measuring vial twice with water to be tested and pour into titration vial.
2.Titrate as described above
3.Divide the number of drops by 4 to obtain milliequivalents per liter (meq/L) of alkalinity.

Conversion:
meq/L x 50 = ppm CaCO3
meq/L x 2.8 = german degrees carbonate hardness (dkh)

HTH
Christy [img]smile.gif[/img]