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Fluoride
www.chemetrics.com | 1-800-356-3072
Method Instrumental Kit
References: APHA Standard Methods, 20
th
ed., pp. 4-
82, Method 4500 F
-
D (1998). USEPA Methods for
V-2000 Multi-Analyte Photometer
Chemical Analysis of Water and Wastes, Method 340.1
(See page 12 for instrumental features)
(1974, 1978). Thomas and Chamberlain, 1974,
Colorimetric Chemical Analytical Methods, 8
th
ed., pp. Range: 0.30-2.00 ppm
186-193.
Method: SPADNS
Fluoride can occur naturally in water, and may also be
Cat#
added in controlled amounts. Accurate determination
Vacu-vials Kit K-4003
1
of fluoride concentrations has become increasingly
Kit comes in a cardboard box and contains everything needed to perform up
to 29 tests (except distilled water): thirty ampoules, 25 mL sample cup,
important as the practice of fluoridation of drinking
ampoule blank, instructions, calibration tables, and MSDS.
water supplies as a public health measure has
Vacu-vials Kits require the use of the V-2000 Photometer or a spec-
increased.
trophotometer capable of accepting a 13 mm diameter round cell.
Instrument sold separately.
Monitoring and maintaining optimum fluoride levels
is essential to maintain effectiveness and safety of the Kit Components common to Fluoride
fluoridation process. The Maximum Contaminant Level
Description Cat#
for fluoride in drinking water is 4.0 mg/L. Fluoride
Sample Cup Pack, 25 mL (6 ea) A-0013
compounds are also involved in the production of alu- Ampoule Blank Pack (5 ea) A-0023
minum, steel, uranium, cement, enamel, and plastics.
1
Although the test kit contains 30 ampoules, a fresh reagent
The Fluoride Vacu-vials
®
test method is based on the ampoule blank must be prepared for each series of tests; there-
reaction between fluoride and a red zirconium-dye
fore, the number of samples that can be tested with each kit will
vary from a maximum of 29 to a minimum of 15.
lake that has been formed with SPADNS. The loss of
Instructions are posted on our website.
color resulting from the reaction of the fluoride with
If no shelf-life is listed for a product, then the shelf-life is at least 2 years.
the dye lake is a function of the fluoride concentra-
tion. Results are expressed in ppm (mg/L) F
-
.
This method is approved by the USEPA for NPDES
and NPDWR reporting purposes when the samples
have been distilled from an acid solution. Seawater
and wastewater samples must be pre-distilled.
Distillation removes most contaminating interferences
except chlorine. Sodium Arsenite has been added to
remove up to 5 mg/L chlorine.
37
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