Standard Terminology Relating to Water

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Publication Date
09-Jul-2002
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10-Feb-2002

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ASTM D1129-01 - Standard Terminology Relating to Water
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NOTICE: This standard has either been superseded and replaced by a new version or discontinued.
Contact ASTM International (www.astm.org) for the latest information.
Designation: D 1129 – 01
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—a measure of the degree of conformity of a value caustic embrittlement—a form of metal failure that occurs in
generated by a specific procedure to the assumed or accepted steam boilers at riveted joints and at tube ends, the cracking
true value, and includes both precision and bias. being predominantly intercrystalline.
acidity—the quantitative capacity of aqueous media to react chlorine requirement—the amount of chlorine required to
with hydroxyl ions. achieve, under specified conditions, the objectives of chlo-
acidity, free mineral—the quantitative capacity of aqueous rination.
media to react with hydroxyl ions to pH 4.3. chlorine residual—the amount of available chlorine present in
acidity, theoretical free mineral—the free mineral acidity that water at any specified time.
would result from the conversion of the anions of strong chlorine, combined available—residual chlorine combined
acids in solution to their respective free acids. with ammonia nitrogen or nitrogenous compounds.

analyte—a possible sample component whose presence and chlorine, free available—the hypochlorite ions (OCl ), hy-
concentration is of interest. pochlorous acid (HOCl) or the combination thereof present
anion-exchange material—a material capable of the revers- in water.
ible exchange of negatively charged ions. chlorosity—the concentration of the dissolved chloride
alkalinity—the quantitative capacity of aqueous media to react equivalent in water at 20°C.
with hydrogen ions. composite sample—a combination of two or more samples.
bias—the persistent positive or negative deviation of the concentrate (reverse osmosis)—the residual portion of an
method average value from the assumed or accepted true aqueous solution applied to a membrane.
value. control analyses—the determination of specific parameters
biological deposits—deposits of organisms or the products of used as criteria for proper operation of a system.
their life processes. corrosion products—products that result from chemical or
blank—matrix carried through all or part of the analytical electrochemical reaction between a metal and its environ-
process, where the analyte is not present, or where the ment.
analyte response is suppressed. dispersion staining—the color effects produced when a trans-
parent object, immersed in a liquid having a refractive index
NOTE 1—A blank must be appropriate to the analytical process it is
near that of the object is viewed under the microscope by a
being used with.
transmitted light and precise-aperture control.
NOTE 2—A blank is typically used to monitor contamination or to
dissolved matter—that matter, exclusive of gases, which is
establish a baseline for quantitation.
dispersed in water to give a single homogeneous liquid
brackish water—water that contains dissolved matter at an
phase.
approximate concentration range from 1000 to 30 000 mg/L.
duplicate sample—one of two (2) representative portions
brine—water that contains dissolved matter at an approximate
taken from the same sample or sample source.
concentration of more than 30 000 mg/L.
electrical conductivity—the reciprocal of the resistance in
cation conductivity—a conductivity measurement performed
ohms measured between opposite faces of a centimetre cube
on water after cations have been exchanged for protons using
of an aqueous solution at a specified temperature.
cation exchange media.
equivalent per million (epm)—a unit chemical equivalent
cation-exchange material—a material capable of the revers-
weight of solute per million unit weights of solution.
ible exchange of positively charged ions.
fixed matter—residues from the ignition of particulate or
dissolved matter, or both.
1
This terminology is under the jurisdiction of ASTM Committee D19 on Water
flow-proportioned sample—a sample obtained by collecting
and is the direct responsibility of Subcommittee D19.02 on General Specifications,
an aliquot volume in proportion to the rate of flow of the
Technical Resources, and Statistical Methods.
stream sampled.
Current edition approved July 10, 2001. Published August 2001. Originally
published as D 1129 – 50. Last previous edition D 1129 – 99a. ghosting—a gas-chromatographic interference, showing as a
2
A Summary of Changes section appears at the end of this terminology.
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