ASTM D1129-02

Designation: D 1129 – 02
Standard Terminology Relating to
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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.Anumber 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—ameasureofthedegreeofconformityofavalue cation-exchange material, n—a material capable of the re-
generatedbyaspecificproceduretotheassumedoraccepted 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.
thatwouldresultfromtheconversionoftheanionsofstrong chlorine residual, n—theamountofavailablechlorinepresent
acids in solution to their respective free acids. in water at any specified time.
analyte, n—a possible sample component whose presence and chlorine, combined available, n—residual chlorine combined
concentration is of interest. with ammonia nitrogen or nitrogenous compounds.
−
anion-exchangematerial,n—amaterialcapableoftherevers- chlorine, free available, n—the hypochlorite ions (OCl ),
ible exchange of negatively charged ions. hypochlorous acid (HOCl) or the combination thereof
alkalinity, n—the quantitative capacity of aqueous media to present in water.
react with hydrogen 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
establish a baseline for quantitation. to generate it and needed for its interpretation.
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
approximateconcentrationrangefrom1000to30000mg/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.
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electrical conductivity, n—the reciprocal of the resistance in
This terminology is under the jurisdiction ofASTM 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 Feb. 10, 2002. Published February 2002. Originally
equivalent per million (epm), n—a unit chemical equivalent
published as D1129–50. Last previous edition D1129–01.
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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 Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
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D1129–02
fixed matter, n—residues from the ignition of particulate or atedsamplecontainerpreparation,coll
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