Fluoride
Fluoride
Fluoride_AccuVac_Other_SPD_Eng_Ody.fm Page 5 of 6
Method Performance
Precision
Standard: 1.00 mg/L F
-
See Section 3.4.3 Precision on page 44 for more information, or if the standard
concentration did not fall within the specified range.
Sensitivity
See Section 3.4.5 Sensitivity on page 44 for more information.
Summary of Method
The SPADNS Method for fluoride determination involves the reaction of
fluoride with a red zirconium-dye solution. The fluoride combines with part of
the zirconium to form a colorless complex, thus bleaching the red color in an
amount proportional to the fluoride concentration. This method is accepted by
the EPA for NPDES and NPDWR reporting purposes when the samples have
been distilled. Seawater and wastewater samples require distillation. Test results
are measured at 580 nm.
Program 95% Confidence Limits of Distribution
190 0.95–1.05 mg/L F
–
195 0.88–1.12 mg/L F
–
Sensitivity ∆Abs
∆Concentration
(Program 190)
∆Concentration
(Program 195)
at 0 0.010 0.03 mg/L F
–
0.02 mg/L F
–
at 1 ppm 0.010 0.03 mg/L F
–
0.03 mg/L F
–
at 2 ppm 0.010 0.04 mg/L F
–
0.04 mg/L F
–
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