ASTM D1129-04

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An American National Standard
Designation:D 1129–04
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 conductivity, n—a conductivity measurement per-
generatedbyaspecificproceduretotheassumedoraccepted formed on water after cations have been exchanged for
true value, and includes both precision and bias. protons using cation exchange media.
acidity, n—the quantitative capacity of aqueous media to react cation-exchange material, n—a material capable of the re-
with hydroxyl ions. versible exchange of positively charged ions.
acidity, free mineral, n—the quantitative capacity of aqueous caustic embrittlement, n—a form of metal failure that occurs
media to react with hydroxyl ions to pH 4.3. in steam boilers at riveted joints and at tube ends, the
acidity, theoretical free mineral, n—the free mineral acidity cracking being predominantly intercrystalline.
thatwouldresultfromtheconversionoftheanionsofstrong chlorine requirement, n—the amount of chlorine required to
acids in solution to their respective free acids. achieve, under specified conditions, the objectives of chlo-
alkalinity, n—the quantitative capacity of aqueous media to rination.
react with hydrogen ions. chlorine residual, n—theamountofavailablechlorinepresent
analyte, n—a possible sample component whose presence and in water at any specified time.
concentration is of interest. chlorine, combined available, n—residual chlorine combined
anion-exchangematerial, n—amaterialcapableoftherevers- with ammonia nitrogen or nitrogenous compounds.
−
ible exchange of negatively charged ions. chlorine, free available, n—the hypochlorite ions (OCl ),
bias, n—the persistent positive or negative deviation of the hypochlorous acid (HOCl) or the combination thereof
method average value from the assumed or accepted true present in water.
value. chlorosity, n—the concentration of the dissolved chloride
biological deposits, n—deposits of organisms or the products equivalent in water at 20°C.
of their life processes. composite sample, n—a combination of two or more samples.
blank, n—matrix carried through all or part of the analytical concentrate (reverse osmosis), n—the residual portion of an
process, where the analyte is not present, or where the aqueous solution applied to a membrane.
analyte response is suppressed. control analyses, n—the determination of specific parameters
used as criteria for proper operation of a system.
NOTE 1—A blank must be appropriate to the analytical process it is
corrosion products, n—products that result from chemical or
being used with.
electrochemical reaction between a metal and its environ-
NOTE 2—A blank is typically used to monitor contamination or to
establish a baseline for quantitation. ment.
data traceability, n—the ability to verify data by having
brackish water, n—water that contains dissolved matter at an
access to, and documentation of, all prior information used
approximateconcentrationrangefrom1000to30000mg/L.
to generate it and needed for its interpretation.
brine, n—water that contains dissolved matter at an approxi-
dispersion staining, n—the color effects produced when a
mate concentration of more than 30 000 mg/L.
transparent object, immersed in a liquid having a refractive
index near that of the object is viewed under the microscope
by a transmitted light and precise-aperture control.
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dissolved matter, n—that matter, exclusive of gases, which is
This terminology is under the jurisdiction ofASTM Committee D19 on Water
and is the direct responsibility of Subcommittee D19.02 on General Specifications,
dispersed in water to give a single homogeneous liquid
Technical Resources, and Statistical Methods.
phase.
Current edition approved March 1, 2004. Published April 2004. Originally
duplicate sample, n—one of two (2) representative portions
approved in 1950. Last previous edition approved in 2003 as D1129–03a.
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A Summary of Changes section appears at the end of this terminology. taken from the same sample or sample source.
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D1129–04
electrical conductivity, n—the reciprocal of the resistance in fluids, with mean pore size larger than 0.01 µm in diameter,
ohms measured between opposite faces of a centimetre c
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