Lamotte PERACETIC ACID TEST KIT User Manual download pdf (Page 2)

PERACETIC ACID

NOTE: This method may be used to test low to high con cen tra tion of peracetic

acid. Choose the pro ce dure that is most appropriate for the sample being tested.

1 drop = 15 ppm

1. Fill test tube (0715) to 10 mL line with sample water.

2. Add 10 drops of *Sulfuric Acid, 1:1 (6141WT). Swirl to mix. Make sure

solution is thoroughly mixed.

3. Add 1 drop of Ferroin Indicator (6410). Swirl to mix. Make sure solution is

thoroughly mixed.

4. Add 1 drop of *Potassium Iodide 20% Solution (6521). Swirl to mix. Make

sure solution is thorougly mixed. Solution will turn a cloudy brown if

peracetic acid is present.

5. While gently swirling tube, add Peracetic Acid Titrant (S-6155), one drop

at a time until brown color changes to a clear, pale orange-pink which

persists for 20 seconds. Make sure solution is thoroughly mixed. Count the

number of drops added.

6. Multiply the number of drops used in Step 5 by 15 (fifteen). Record as ppm

Peracetic Acid.

For example:

10 drops x 15 = 150 ppm Peracetic Acid

1 drop = 6ppm

Fill the test tube to the 25 mL line. Follow the test procedure and use 25 drops

of *Sulfuric Acid, 1:1 (6141WT), 3 drops of Ferroin Indicator (6410) and 3

drops of *Potassium Iodide 20% Solution (6521). In Step 6 multiply the number

of drops used by 6 (six). Record as ppm Peracetic Acid.

For example:

10 drops x 6 = 60 ppm Peracetic Acid

1 drop = 300 ppm

For higher concentrations of peracetic acid use the 0.5 mL pipet (0353) to add

0.5 mL of the sample to the test tube (0715). Fill the tube to the 10 mL line with

hydrogen peroxide/peracetic acid-free water. Follow Steps 2 - 5. In Step 6

multiply the number of drops used by 300 (three hundred). Record as ppm

Peracetic Acid

For example:

10 drops X 300 = 3000 ppm Peracetic Acid

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Lamotte PERACETIC ACID TEST KIT User Manual Page 2