Standard Practices for Preparation and Preliminary Testing of Water-Formed Deposits

SIGNIFICANCE AND USE
Deposits in piping from aqueous process streams serve as an indicator of fouling, corrosion or scaling. Rapid techniques of analysis are useful in identifying the nature of the deposit so that the reason for deposition can be ascertained.
Possible treatment schemes can be devised to prevent deposition from reoccurring.
Deposits formed from or by water in all its phases may be further classified as scale, sludge, corrosion products or biological deposits. The overall composition of a deposit or some part of a deposit may be determined by chemical or spectrographic analysis; the constituents actually present as chemical substances may be identified by microscope or
X ray.
SCOPE
1.1 These practices provide directions for the preparation of the sample for analysis, the preliminary examination of the sample, and methods for dissolving the analytical sample or selectively separating constituents of concern.
1.2 The general practices given here can be applied to analysis of samples from a variety of surfaces that are subject to water-formed deposits. However, the investigator must resort to individual experience and judgement in applying these procedures to specific problems.
1.3 The practices include the following:SectionsPreparation of the Analytical Sample8Preliminary Testing of the Analytical Sample9Dissolving the Analytical Sample10
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. For a specific warning statement, see Note 2.

General Information

Status
Historical
Publication Date
02-Jul-1980
Current Stage
Ref Project

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ASTM D2331-80(2003) - Standard Practices for Preparation and Preliminary Testing of Water-Formed Deposits
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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Contact ASTM International (www.astm.org) for the latest information
Designation:D 2331–80 (Reapproved 2003)
Standard Practices for
Preparation and Preliminary Testing of Water-Formed
1
Deposits
This standard is issued under the fixed designation D 2331; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (e) indicates an editorial change since the last revision or reapproval.
1. Scope D 1128 Method for Identification of Types of Microorgan-
3
isms and Microscopic Matter in Water and Waste Water
1.1 These practices provide directions for the preparation of
D 1129 Terminology Relating to Water
the sample for analysis, the preliminary examination of the
D 1193 Specification for Reagent Water
sample, and methods for dissolving the analytical sample or
D1245 PracticeforExaminationofWater-FormedDeposits
selectively separating constituents of concern.
by Chemical Microscopy
1.2 The general practices given here can be applied to
D 2332 Practice forAnalysis of Water-Formed Deposits by
analysis of samples from a variety of surfaces that are subject
Wavelength-Dispersive X-Ray Fluorescence
to water-formed deposits. However, the investigator must
E11 Specification for Wire Cloth Sieves for Testing Pur-
resorttoindividualexperienceandjudgementinapplyingthese
poses
procedures to specific problems.
1.3 The practices include the following:
3. Terminology
Sections
3.1 Definitions—For definitions of terms used in these
Preparation of the Analytical Sample 8
Preliminary Testing of the Analytical Sample 9
practices, refer to Terminology D 1129.
Dissolving the Analytical Sample 10
4. Significance and Use
1.4 This standard does not purport to address all of the
safety concerns, if any, associated with its use. It is the 4.1 Deposits in piping from aqueous process streams serve
as an indicator of fouling, corrosion or scaling. Rapid tech-
responsibility of the user of this standard to establish appro-
priate safety and health practices and determine the applica- niques of analysis are useful in identifying the nature of the
deposit so that the reason for deposition can be ascertained.
bility of regulatory limitations prior to use. For a specific
warning statement, see Note 2. 4.2 Possible treatment schemes can be devised to prevent
deposition from reoccurring.
2. Referenced Documents
4.3 Deposits formed from or by water in all its phases may
2
2.1 ASTM Standards: be further classified as scale, sludge, corrosion products or
D 887 Practices for Sampling Water-Formed Deposits biological deposits. The overall composition of a deposit or
D 932 Test Method for Iron Bacteria in Water and Water- some part of a deposit may be determined by chemical or
Formed Deposits spectrographic analysis; the constituents actually present as
D 933 Practice for Reporting Results of Examination and chemical substances may be identified by microscope or
Analysis of Water-Formed Deposits X ray.
D 934 Practices for Identification of Crystalline Com-
5. Reagents and Materials
pounds in Water-Formed Deposits by X-Ray Diffraction
5.1 Purity of Reagents—Reagent grade chemicals shall be
D 993 Test Method for Sulfate-Reducing Bacteria in Water
3
and Water-Formed Deposits used in all tests. Unless otherwise indicated, it is intended that
all reagents shall conform to specifications of the Committee
on Analytical Reagents of the American Chemical Society,
1 4
These practices are under the jurisdiction of ASTM Committee D19 on Water
where such specifications are available. Other grades may be
and are the direct responsibility of Subcommittee D19.03 on Sampling ofWater and
used, provided it is first ascertained that the reagent is of
Water-Formed Deposits, Analysis of Water for Power Generation and Process Use,
On-Line Water Analysis, and Surveillance of Water.
Current edition approved July 3, 1980. Published September 1980. Originally
4
approved in 1965. Last previous edition approved in 1980 as D 2331 – 80. Reagent Chemicals, American Chemical Society Specifications, American
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or Chemical Society, Washington, DC. For suggestions on the testing of reagents not
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM listed by the American Chemical Society, see Analar Standards for Laboratory
Standards volume information, refer to the standard’s Document Summary page on Chemicals, BDH Ltd., Poole, Dorset, U.K., and the United States Pharmacopeia
the ASTM website. and National Formulary, U.S. Pharmaceutical Convention, Inc. (USPC), Rockville,
3
Withdrawn. MD.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
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