ASTM D1129-06

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn. Contact ASTM
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Designation: D 1129 – 06
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.
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-exchangematerial,n—amaterialcapableoftherevers- 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—acombinationoftwoormoresamples.
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
critical level, n—with a specified level of confidence (for
being used with.
example, 95 % or 99 %), the lowest result that indicates the
NOTE 2—A blank is typically used to monitor contamination or to
establish a baseline for quantitation. presence of an analyte.
DISCUSSION—Specifically, the lowest result that is statistically differ-
brackish water, n—water that contains dissolved matter at an
ent from zero. This term originates with the publications of Lloyd
approximateconcentrationrangefrom1000to30000mg/L.
Currie (Anal. Chem. 40 (1968) 586; ISO 11843–1:1997). A critical
brine, n—water that contains dissolved matter at an approxi-
level is dependent on the analyte of interest, the analytical method, and
mate concentration of more than 30 000 mg/L.
the matrix. The U.S. Environmental Protection Agency’s Method
cation conductivity, n—a conductivity measurement per-
Detection Limit (MDL) (Federal Register 40 CFR, Part 136, Appedix
formed on water after cations have been exchanged for
B, 7–1–99 edition) is an example of a critical level.
protons using cation exchange media.
data traceability, n—the ability to verify data by having
access to, and documentation of, all prior information used
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to generate it and needed for its interpretation.
This terminology is under the jurisdiction ofASTM Committee D19 on Water
and is the direct responsibility of Subcommittee D19.02 on General Specifications,
dispersion staining, n—the color effects produced when a
Technical Resources, and Statistical Methods.
transparent object, immersed in a liquid having a refractive
Current edition approved Feb. 15, 2006. Published March 2006. Originally
e1 index near that of the object is viewed under the microscope
approved in 1950. Last previous edition approved in 2004 as D1129–04 .
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A Summary of Changes section appears at the end of this terminology. by a transmitted light and precise-aperture control.
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