ASTM D1129-02a

NOTICE: This standard has either been superceded and replaced by a new version or discontinued.
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Designation: D 1129 – 02a
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 versible exchange of positively charged ions.
generated by a specific procedure to the assumed or accepted caustic embrittlement, n—a form of metal failure that occurs
true value, and includes both precision and bias. in steam boilers at riveted joints and at tube ends, the
acidity, n—the quantitative capacity of aqueous media to react cracking being predominantly intercrystalline.
with hydroxyl ions. chlorine requirement, n—the amount of chlorine required to
acidity, free mineral, n—the quantitative capacity of aqueous achieve, under specified conditions, the objectives of chlo-
media to react with hydroxyl ions to pH 4.3. rination.
acidity, theoretical free mineral, n—the free mineral acidity chlorine residual, n—the amount of available chlorine present
that would result from the conversion of the anions of strong in water at any specified time.
acids in solution to their respective free acids. chlorine, combined available, n—residual chlorine combined
analyte, n—a possible sample component whose presence and with ammonia nitrogen or nitrogenous compounds.
−
concentration is of interest. chlorine, free available, n—the hypochlorite ions (OCl ),
anion-exchange material, n—a material capable of the revers- hypochlorous acid (HOCl) or the combination thereof
ible exchange of negatively charged ions. present in water.
alkalinity, n—the quantitative capacity of aqueous media to chlorosity, n—the concentration of the dissolved chloride
react with hydrogen ions. equivalent in water at 20°C.
bias, n—the persistent positive or negative deviation of the composite sample, n—a combination of two or more samples.
method average value from the assumed or accepted true concentrate (reverse osmosis), n—the residual portion of an
value. aqueous solution applied to a membrane.
biological deposits, n—deposits of organisms or the products control analyses, n—the determination of specific parameters
of their life processes. used as criteria for proper operation of a system.
blank, n—matrix carried through all or part of the analytical corrosion products, n—products that result from chemical or
process, where the analyte is not present, or where the electrochemical reaction between a metal and its environ-
analyte response is suppressed. ment.
data traceability, n—the ability to verify data by having
NOTE 1—A blank must be appropriate to the analytical process it is
access to, and documentation of, all prior information used
being used with.
to generate it and needed for its interpretation.
NOTE 2—A blank is typically used to monitor contamination or to
establish a baseline for quantitation. dispersion staining, n—the color effects produced when a
transparent object, immersed in a liquid having a refractive
brackish water, n—water that contains dissolved matter at an
index near that of the object is viewed under the microscope
approximate concentration range from 1000 to 30 000 mg/L.
by a transmitted light and precise-aperture control.
brine, n—water that contains dissolved matter at an approxi-
dissolved matter, n—that matter, exclusive of gases, which is
mate concentration of more than 30 000 mg/L.
dispersed in water to give a single homogeneous liquid
cation conductivity, n—a conductivity measurement per-
phase.
formed on water after cations have been exchanged for
duplicate sample, n—one of two (2) representative portions
protons using cation exchange media.
taken from the same sample or sample source.
cation-exchange material, n—a material capable of the re-
electrical conductivity, n—the reciprocal of the resistance in
ohms measured between opposite faces of a centimetre cube
of an aqueous solution at a specified temperature.
1
This terminology is under the jurisdiction of ASTM Committee D19 on Water
equivalent per million (epm), n—a unit chemical equivalent
and is the direct responsibility of Subcommittee D19.02 on General Specifications,
Technical Resources, and Statistical Methods. weight of solute per million unit weights of solution.
Current edition approved July 10, 2002. Published July 2002. Originally
fixed matter, n—residues from the ignition of particulate or
published as D 1129 – 50. Last previous edition D 1129 – 02.
dissolved matter, or both.
2
A Summary of Changes section appears at th
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