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SULFITE KIT
DROP COUNT, 1 DROP = 2, 5, 10 mL
CODE 7132-01
QUANTITY CONTENTS CODE
15 mL *Phenolphthalein Indicator, 0.5% *2258-E
10g *Starch Acid Indicator Powder *6385-D
60 mL Iodide Iodate 2779WT-H
1 Test Tube, 5-10-25 mL, plastic, w/cap 0715
1 Spoon, 0.1g, plastic 0699
*WARNING: Reagents marked with an * are considered to be potential health hazards.
To view or print a Safety Data Sheet (SDS) for these reagents go to www.lamotte.com
Search for the four digit reagent code number listed on the reagent label, in the contents
list or in the test procedures. Omit any letter that follows or precedes the four digit
code number. For example, if the code is 4450WT-H, search 4450. To obtain a printed
copy, contact LaMotte by email, phone or fax.
Emergency information for all LaMotte reagents is available from Chem-Tel:
(US, 1-800-255-3924) (International, call collect, 813-248-0585)
To order individual reagents or test kit components, use the specifi ed code number.
PROCEDURE
.
1. Rinse test tube (0715) with sample water. Fill with desired sample size selected
from table.
SAMPLE
SIZE
25 mL 1 drop = 2 ppm
10 mL 1 drop = 5 ppm
5 mL 1 drop = 10 ppm
2. Add 1 drop of *Phenolphthalein Indicator, 0.5% (2258). Swirl to mix. If pink, use
the 0.1g spoon (0699) to add *Starch Acid Indicator Powder (6385), one spoonful
at a time, swirling after each spoonful, until pink color disappears. If solution is
colorless, proceed to Step 3.
3. Use the 0.1g spoon (0699) to add 1 spoonful of *Starch Acid Indicator Powder
(6385). Swirl to mix.
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EQUIVALENCE
(ppm Per Drop)
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4. While gently swirling tube, add Iodide Iodate (2779WT), one drop at a time, until
solution turns blue. Count the number of drops added. Hold dropper bottle vertically.
5. Multiply number of drops used in Step 4 as follows:
25 mL sample multiply by 2
10 mL sample multiply by 5
5 mL sample multiply by 10
Record as ppm Sulfi te (SO
).
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NOTE: To convert to ppm Sodium Sulfi te (Na2SO3), multiply fi nal result by 1.58.
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