Fluoride

Inorganic Anions by Ion Chromatography (By EPA 300.0) 

Scope:

Part A of the test method covers the determination of common inorganic anions in drinking water, surface water, mixed domestic and industrial wastewaters, groundwater, reagent waters, solids (after extraction), leachates (when no acetic acid is used). Part B of the test method covers the determination of bromate, chlorate, and chlorite in drinking and reagent waters.

A small volume of sample, typically 50-100 uL, is introduced into an ion chromatograph. The anions of interest are separated and measured, using a system comprised of a guard column, separator column, suppressor device, and conductivity detector.

-Methods for the Determination of Inorganic Substances in Environmental Samples (EPA/600/R-93/100)

Method Data

Method 300.0
Hold TimePart A: 48 Hours (NO2-N, NO3-N, orthophosphate-P) 28 days (others) Part B: Bromate and Chlorate (28 days) and chlorite (14 days with preservation -- otherwise analyze immediately).
PreservationPart A: No preservation is required for bromide, chloride, or fluoride. Refrigerate samples at 4 degrees C for nitrate-N, nitrite-N, orthophosphate-P, and sulfate. Samples being tested for nitrate/nitrite should be adjusted to pH < 2 with concentrated H2SO4 and refrigerated at 4 degrees C until analysis. Analyze samples being tested for bromide, chloride, fluoride, nitrate/nitrite, and sulfate within 28 days. Analyze samples being tested for nitrate-N, nitrite-N, and orthophosphate-P within 48 hours. Part B: Samples analyzed for bromate and chlorate may be held for 28 days without preservation. Chlorite should be analyzed for immediately (within 10 minutes). However, if the sample cannot be analyzed immediately, it may be preserved for up to 14 days if treated with ethylenediamine (ClO2 should be removed prior to this step) and chilled to 4oC.
Sample Volume250mL HDPE bottle
InstrumentationIon Chromotography
Method Refernce300

Analyte List

AnalyteFormulaCAS Number
FluorideF16984-48-8

*Please contact our project management team for more information about reporting limits and other specific project needs.

Fluoride

Inorganic Anions by Ion Selective Electrode (By SM 4500-F-C

Scope:

This method covers the determination of fluoride in drinking water. The fluoride electrode is an ion-selective sensor. The key element in the fluoride electrode is the laser-type doped lanthanum fluoride crystal across which a potential is established by fluoride solutions of different concentrtations. The crystal contacts the sample solution at one face and an internal reference soluton at the other. The fluoride electrode can be used with a standard calomel reference electrode and almost any modern pH meter having an expanded millivolt scale. 

-Standard Methods for the Examination of Water and Wastewater

Method Data

Method 4500-F-C
Hold Time28 days
PreservationNo preservation is required
Sample Volume250mL HDPE bottle
Collection MethodGrab sampling
InstrumentationIon Selective Electrode
Method Refernce4500-F-C

Analyte List

AnalyteFormulaCAS Number
FluorideF16984-48-8

*Please contact our project management team for more information about reporting limits and other specific project needs.

Fluoride

Inorganic Anions by Ion Chromatography (By EPA-RCA 9056A

Scope:

This method is applicable to the determination of chloride, fluoride, bromide, nitrate, phosphate, and sulfate in the collection solutions from the bomb combustion of solid waste samples, as well as all water samples.

A small volume (2-3 mL) of sample is injected into an ion chromatograph to flush and fill a constant volume sample loop. The sample is then injected into a stream of carbonate-bicarbonate eluent of the same strength as the sample. The samples are passed through three ion exchange columns (with different functionalities), and compounds are identified by retention time, and quantitated by peak height or area (by comparison with a standard calibration curve).

– SW-846 Update IVB

Method Data

Method EPA-RCA 9056A
Hold TimeASAP
PreservationPreserve the samples by refrigeration at 4 degrees C. Analyze the samples as soon as possible after collection.
Sample Volume250mL HDPE bottle
Collection MethodGrab sampling
InstrumentationIon Chromotography
Method RefernceEPA-RCA 9056A

Analyte List

AnalyteFormulaCAS Number
FluorideF16984-48-8

*Please contact our project management team for more information about reporting limits and other specific project needs.

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