LaMotte 7181 User Manual

CAUS TIC TEST KIT

CODE 7181

QUANTITY CONTENTS CODE

30 mL *Hydrochloric Acid, 3.6N *5649WT-G
15 mL *Phenolphthalein Indicator, 0.5% *2258-E
30 mL *Barium Chloride Solution, 10% *6117-G
1 Pipet, 0.5 mL, plastic 0353
1 Test Tube, 5-10-15-20-25 mL, plastic, w/cap 0715

*WARNING: Reagents marked with an * are considered to be potential health
hazards. To view or print a Material Safety Data Sheet (MSDS) for these reagents go to
www.lamotte.com. To obtain a printed copy, contact LaMotte by e-mail, phone or fax.

To order individual reagents or test kit components, use the specified code number.

NOTE: The procedures below eliminate non-hydroxyl alkalinity
contributors. If a total alkalinity determination is preferred, skip the
addition of *Barium Chloride Solution 10% (6117) in Step 2 or Step 3.
Record the result as total alkalinity as NaOH.

PRO CE DURE

1 DROP = 0.1%

1. Fill test tube (0715) to 5 mL line with sample.

2. Add 10 drops of *Barium Chloride Solution, 10% (6117). Swirl to

mix. A white precipitate will form if carbonates are present.

3. Add 1 drop of *Phenolphthalein Indicator, 0.5% (2258). Swirl to
mix. Solution will turn pink.

4. 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.

5. Multiply the number of drops used in Step 4 by 0.1. Record as
Percent Caustic as NaOH.

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

LaMOTTE COM PANY

Helping Peo ple Solve An a lyt i cal Challenges

PO Box 329 • Chestertown • Mary land • 21620 • USA

800-344-3100 • 410-778-3100 (Out side U.S.A.) • Fax [phone]

Visit us on the web at www.lamotte.com

®

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