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DR/2400
(
Method 8029
Reagent Solution or AccuVac
Scope and Application:
drinking and wastewater analyses (distillation required; see Distillation on page 3)**
* Adapted from Standard Methods for the Examination of Water and Wastewater, 4500-F B & D
** Procedure is equivalent to USEPA method 340.1 for drinking water and wastewater.
Tips and Techniques
• The sample and deionized water should be at the same temperature (±1 °C). Temperature adjustments may be made before or
after reagent addition.
• SPADNS Reagent is toxic and corrosive. Use care while handling the reagent.
• For best results, measure the volume of SPADNS Reagent as accurately as possible.
• Wipe the outside of sample cells before each insertion into the instrument cell holder. Use a damp towel followed by a dry one to
remove fingerprints or other marks.
• SPADNS Reagent contains sodium arsenite. Final solutions will contain arsenic (D004) in sufficient concentration to be regulated
as a hazardous waste for Federal RCRA. See Section 4 for information on proper disposal of these materials.
• If the instrument displays OVER!, dilute a fresh sample (5 mL) with an equal volume of deionized water and repeat the test, using
this solution in step 2. Multiply the result by 2.
Using SPADNS Reagent
Hach Programs
1.
Touch
.
Hach Programs
Select program
.
190 Fluoride
Touch
.
Start
Fluoride_AccuVac_Other_SPD_Eng_Ody.fm
®
Ampuls
For water, wastewater and seawater; USEPA accepted for reporting for
10 mL
2.
Pipet 10.0 mL of
sample into a dry, round
sample cell (this is the
prepared sample).
10 mL
3.
Pipet 10.0 mL of
deionized water into a
second dry, round sample
cell (this is the blank).
Fluoride
SPADNS Method*
(0.02 to 2.00 mg/L F
Method 8029
10 mL
10 mL
4.
Carefully pipet
2.0 mL of SPADNS
Reagent into each cell.
Swirl to mix.
Fluoride
Page 1 of 6
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)
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