Standard Test Methods for Analysis for Fluoride Content of the Atmosphere and Plant Tissues (Semiautomated Method)

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1.1 These test methods describe the semiautomated procedure for the analyses of various types of samples for the purpose of determining total fluoride. Since the test methods incorporate microdistillation of the sample, they may be applied to any fluoride-containing solution where standards of identical composition have been carried through the same sample preparation procedures and have proven to provide quantitative recovery when analyzed by the semiautomated system. Conversely, the methods shall not be applied for analyses until the applicability has been demonstrated.
1.2 In normal use, the procedure can detect 0.1 [mu]g/mL of F. The normal range of analysis is from 0.1 to 1.6 [mu]g/mL of F. Higher concentrations can be analyzed by careful dilution of samples with reagent water. If digested samples routinely exceed 1.6 [mu]g/mL of F, the analytical portion of the pump manifold can be modified to reduce sensitivity. However, the best procedure is to analyze a smaller aliquot of the sample. Most accurate results are obtained when the fluoride concentration falls in the middle or upper part of the calibration curve.
1.3 The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only.
1.4 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use. See 8.3 for additional precautions.

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ASTM D3270-00 - Standard Test Methods for Analysis for Fluoride Content of the Atmosphere and Plant Tissues (Semiautomated Method)
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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
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Designation:D3270–00
Standard Test Methods for
Analysis for Fluoride Content of the Atmosphere and Plant
1
Tissues (Semiautomated Method)
This standard is issued under the fixed designation D3270; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision.Anumber in parentheses indicates the year of last reapproval.A
superscript epsilon (e) indicates an editorial change since the last revision or reapproval.
1. Scope D3266 Test Method forAutomated Separation and Collec-
tion of Particulate and Acidic Gaseous Fluoride in the
1.1 These test methods describe the semiautomated proce-
3
Atmosphere (Double Paper Tape Sampler Method)
dure for the analyses of various types of samples for the
D3267 Test Method for Separation and Collection of Par-
purpose of determining total fluoride. Since the test methods
ticulate and Water-Soluble Gaseous Fluorides in the At-
incorporate microdistillation of the sample, they may be
3
mosphere (Filter and Impinger Method)
applied to any fluoride-containing solution where standards of
D3268 Test Method for Separation and Collection of Par-
identical composition have been carried through the same
ticulateandGaseousFluoridesintheAtmosphere(Sodium
sample preparation procedures and have proven to provide
Bicarbonate-Coated Glass Tube and Particulate Filter
quantitative recovery when analyzed by the semiautomated
3
Method)
system. Conversely, the methods shall not be applied for
D3269 Test Methods for Analysis for Fluoride Content of
analyses until the applicability has been demonstrated.
3
the Atmosphere and Plant Tissues (Manual Procedures)
1.2 In normal use, the procedure can detect 0.1 µg/mLof F.
D3614 Guide for Laboratories Engaged in Sampling and
The normal range of analysis is from 0.1 to 1.6 µg/mL of F.
3
Analysis of Atmospheres and Emissions
Higher concentrations can be analyzed by careful dilution of
samples with reagent water. If digested samples routinely
3. Terminology
exceed 1.6 µg/mL of F, the analytical portion of the pump
3.1 Definitions—For definitions of terms used in these
manifold can be modified to reduce sensitivity. However, the
methods, see Terminology D1356.
best procedure is to analyze a smaller aliquot of the sample.
Most accurate results are obtained when the fluoride concen-
4. Summary of Test Methods
trationfallsinthemiddleorupperpartofthecalibrationcurve.
4.1 These semiautomated methods are based on the distil-
1.3 The values stated in SI units are to be regarded as the
lation of hydrogen fluoride (HF) from the sample and subse-
standard. The values given in parentheses are for information
quent reaction of the distillate with alizarin fluorine blue-
only.
lanthanum nitrate reagent, to form a blue complex which is
1.4 This standard does not purport to address all of the
4
measured colorimetrically at 624 nm (1) , or the subsequent
safety concerns, if any, associated with its use. It is the
measurement with a specific ion probe.
responsibility of the user of this standard to establish appro-
4.2 General, Plant Material:
priate safety and health practices and determine the applica-
4.2.1 The plant material including leaf samples, washed or
bility of regulatory limitations prior to use.See8.3,10.2.4,and
unwashed, is dried, and ground, then dissolved with perchloric
10.2.5 for additional precautions.
acid and diluted to 50 mL with water. In the case of leaf
samples, an appreciable amount of fluoride may be deposited
2. Referenced Documents
on the external leaf surfaces. This fluoride behaves differently
2.1 ASTM Standards:
2 physiologically from fluoride absorbed into the leaf and it is
D1193 Specification for Reagent Water
oftendesirabletowashitfromthesurfaceasapreliminarystep
D1356 Terminology Relating to Sampling andAnalysis of
3 in the analysis. Details of a leaf-washing process are described
Atmospheres
in 9.1.
4.3 General, Atmospheric Samples:
4.3.1 Test Methods D3269 contains acceptable procedures
1
These test methods are under the jurisdiction of ASTM Committee D22 on and also techniques for the proper preparation of atmospheric
Sampling and Analysis of Atmospheres and are the direct responsibility of
samples. Test Methods D3266, D3267, and D3268 are
Subcommittee D22.03 on Ambient Atmospheres and Source Emissions.
Current edition approved March 10, 2000. Published May 2000. Originally
e1
published as D 3270 - 91. Last previous edition D 3270 - 91 (1995) .
2 4
Annual Book of ASTM Standards, Vol 11.01. The boldface numbers in parenthesis refer to the references at the end of this
3
Annual Book of ASTM Standards, Vol 11.03. method.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
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D3270–00
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