Boron
Boron
Page 2 of 4
Boron_PP_Other_CAR_Eng_Ody.fm
Sample Collection, Preservation, and Storage
Collect samples in clean polyethylene or polypropylene bottles, or
alkali-resistant, boron-free glass.
Reagent Preparation
To prepare additional BoroVer 3/Sulfuric Acid Solution, mix one BoroVer 3
Reagent Powder Pillow per 75 mL of concentrated sulfuric acid, adding the
powder pillows individually while stirring. Preparation of this solution
generates gaseous HCl when the indicator pillow is added to the sulfuric acid.
Use of a fume hood or other well-ventilated lab area is strongly advised. This
solution is stable for up to 48 hours if stored in plastic containers. Do not store in
Pyrex
®
or Kimex
®
glassware for longer than one hour; the solution may leach
boron from these containers.
5. Accurately pipet
2.0 mL of sample into
another 125-mL
Erlenmeyer flask
(the prepared sample).
6. Using a 50-mL
graduated cylinder, add
35 mL of the solution
prepared in step 3 to each
Erlenmeyer flask. Swirl
to mix completely.
7. Touch the timer icon.
Touch
OK.
A 25-minute reaction
period will begin.
8. When the timer
beeps, pour at least
10 mL from each flask
into separate round
sample cells. Cap the
cells.
9. Place the blank into
the cell holder.
10. Touch Zero.
The display will show:
0.0 mg/L B
11. Place the prepared
sample into the cell
holder.
12. Touch Read.
Results will appear in
mg/L B.
10 mL
20 mL
25 mL
10 mL
20 mL
25 mL
10 mL
20 mL
25 mL
Zero
10 mL
20 mL
25 mL
Read
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