Standard Terminology Relating to Water

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Publication Date
09-Mar-2003
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ASTM D1129-03 - Standard Terminology Relating to Water
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NOTICE: This standard has either been superceded and replaced by a new version or discontinued.
Contact ASTM International (www.astm.org) for the latest information.
Designation: D 1129 – 03
Standard Terminology Relating to
1,2
Water
This standard is issued under the fixed designation D 1129; 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.
This standard has been approved for use by agencies of the Department of Defense.
accuracy, n—a measure of the degree of conformity of a value cation-exchange material, n—a material capable of the re-
generated by a specific procedure to the assumed or accepted versible exchange of positively charged ions.
true value, and includes both precision and bias. caustic embrittlement, n—a form of metal failure that occurs
acidity, n—the quantitative capacity of aqueous media to react in steam boilers at riveted joints and at tube ends, the
with hydroxyl ions. cracking being predominantly intercrystalline.
acidity, free mineral, n—the quantitative capacity of aqueous chlorine requirement, n—the amount of chlorine required to
media to react with hydroxyl ions to pH 4.3. achieve, under specified conditions, the objectives of chlo-
acidity, theoretical free mineral, n—the free mineral acidity rination.
that would result from the conversion of the anions of strong chlorine residual, n—the amount of available chlorine present
acids in solution to their respective free acids. in water at any specified time.
alkalinity, n—the quantitative capacity of aqueous media to chlorine, combined available, n—residual chlorine combined
react with hydrogen ions. with ammonia nitrogen or nitrogenous compounds.

analyte, n—a possible sample component whose presence and chlorine, free available, n—the hypochlorite ions (OCl ),
concentration is of interest. hypochlorous acid (HOCl) or the combination thereof
anion-exchange material, n—a material capable of the revers- present in water.
ible exchange of negatively charged ions. chlorosity, n—the concentration of the dissolved chloride
bias, n—the persistent positive or negative deviation of the equivalent in water at 20°C.
method average value from the assumed or accepted true composite sample, n—a combination of two or more samples.
value. concentrate (reverse osmosis), n—the residual portion of an
biological deposits, n—deposits of organisms or the products aqueous solution applied to a membrane.
of their life processes. control analyses, n—the determination of specific parameters
blank, n—matrix carried through all or part of the analytical used as criteria for proper operation of a system.
process, where the analyte is not present, or where the corrosion products, n—products that result from chemical or
analyte response is suppressed. electrochemical reaction between a metal and its environ-
ment.
NOTE 1—A blank must be appropriate to the analytical process it is
data traceability, n—the ability to verify data by having
being used with.
access to, and documentation of, all prior information used
NOTE 2—A blank is typically used to monitor contamination or to
to generate it and needed for its interpretation.
establish a baseline for quantitation.
dispersion staining, n—the color effects produced when a
brackish water, n—water that contains dissolved matter at an
transparent object, immersed in a liquid having a refractive
approximate concentration range from 1000 to 30 000 mg/L.
index near that of the object is viewed under the microscope
brine, n—water that contains dissolved matter at an approxi-
by a transmitted light and precise-aperture control.
mate concentration of more than 30 000 mg/L.
dissolved matter, n—that matter, exclusive of gases, which is
cation conductivity, n—a conductivity measurement per-
dispersed in water to give a single homogeneous liquid
formed on water after cations have been exchanged for
phase.
protons using cation exchange media.
duplicate sample, n—one of two (2) representative portions
taken from the same sample or sample source.
1 electrical conductivity, n—the reciprocal of the resistance in
This terminology is under the jurisdiction of ASTM Committee D19 on Water
and is the direct responsibility of Subcommittee D19.02 on General Specifications, ohms measured between opposite faces of a centimetre cube
Technical Resources, and Statistical Methods.
of an aqueous solution at a specified temperature.
Current edition approved March 10, 2003. Published April 2003. Originally
equivalent per million (epm), n—a unit chemical equivalent
approved in 1950. Last previous edition approved in 2002 as D 1129 – 02a.
2
weight of solute per million unit weights of solution.
A Summary of Changes section appears at the end of this terminology.
Copyright © ASTM International, 100 Barr Harbo
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