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5. Insert tube into chamber, close
lid and select
Scan Blank
.
6. Remove tube from colorimeter.
Add 6 drops of *Acid
Phenanthroline Indicator
(2776).
7. Cap and invert 4 times to mix.
05:00
8. Use the 0.1 g spoon (0699)
to add one measure of *Iron
Reducing Reagent (2777).
9. Cap and invert 15 times to mix.
Calibration
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