5 Startup
Complete Chapter 4 before starting this section.
5.1 Prepare the reagent
Complete the following steps to prepare the potassium iodide reagent.
WARNING!
HAZARDOUS SUBSTANCE
The reagent contains potassium iodide dissolved in distilled vinegar or 5% acetic acid. Avoid
contact with skin and eyes. Wash thoroughly after using.
Important
Do not prepare the solution until ready to use.
Procedure
1. Position the blue plastic carboy under the sample conditioning cabinet. Unscrew the
cap and reagent tube assembly.
2. Add the potassium iodide reagent to the carboy.
See the table.
Expected range, ppm as Cl
2
Amount of KI needed per 5
gal (19 L) of vinegar Part number
0-5 ppm 25 grams 24164-00
0-10 ppm 50 grams 24164-01
0-20 ppm 2 x 50 grams 24164-01
3. Add 5 gallons (19 L) of distilled white vinegar one gallon (4 L) at a time. Swirl the
carboy after each addition.
4. Screw the cap on the carboy. Be sure the reagent uptake tube extends to the
bottom of the carboy.
5. If it hasn't already been connected, connect the reagent tube to the small fitting on
the bottom left hand side of the enclosure.
Note
The shelf life of the potassium iodide vinegar solution is at least two months if stored in the
blue carboy. Do not store the reagent in a container other than the blue carboy. The reagent
is sensitive to sunlight, which the blue carboy effectively blocks.
Startup
Manual 25
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