Phosphonates
Phosphonates
Page 2 of 6
Phosphonates_PP_Other_PUV_Eng_Ody.fm
5. Add the contents of
one Potassium Persulfate
for Phosphonate Powder
Pillow to the bottle
containing 25 mL of
sample.
Swirl to mix.
6. Insert the ultraviolet
(UV) lamp into the
sample bottle.
7. Turn on the UV lamp.
Touch the timer icon.
Touch
OK.
A ten-minute reaction
period will begin.
Note: Phosphonates are
converted to orthophosphate in
this step.
8. When the timer
beeps, turn off the UV
lamp and remove it from
the sample.
9. Pour off about 15 mL
of sample into a 50-mL
beaker and pour the
remaining 10 mL into a
round sample cell (this is
the prepared sample).
10. Add the contents of
one PhosVer 3 Phosphate
Reagent Powder Pillow
to the blank and prepared
sample. Immediately cap
and invert to mix.
A blue color will develop
if phosphate is present.
Both sample and blank
cells may develop color.
The increase in sample
color is proportional to
the phosphonate
concentration.
11. Touch the timer icon.
Touch
OK.
A two-minute reaction
period will begin.
If the sample is colder
than 15 °C, allow four
minutes for color
development.
12. When the timer
beeps, place the blank
into the cell holder.
Complete steps 13–15
within three minutes after
the timer beeps.
10 mL
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