LaMotte CAUSTIC TEST KIT 7181 - Manual (Page 2)

1 DROP = 1%
1.
Use the 0.5 mL pipet (0353) to add 0.5 mL of sample to test tube
(0715).
2. Dilute to 5 mL line with tap water.
3. Add 10 drops of *Barium Chloride Solution, 10% (6117). Swirl to
mix. A white precipitate will form if carbonates are present.
4. Add 1 drop of *Phenolphthalein Indicator, 0.5% (2258). Swirl to
mix. Solution will turn pink.
5. While gently swirling tube, add *Hydrochloric Acid, 3.6N
(5649WT) one drop at a time until pink color disappears. Count the
number of drops added. Hold dropper bottle vertically.
6. Multiply the number of drops used in Step 5 by 1. Record as
Percent Caustic as NaOH.
CON VER SION
To report the result as Percent Caustic as KOH, multiply the Percent
Caustic as NaOH by 1.4
Percent Caustic as NaOH X 1.4 = Percent Causic as KOH
For example:
0.2% as NaOH X 1.4 = 0.28% as KOH
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