Standard Terminology Relating to Water

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ASTM D1129-10 - Standard Terminology Relating to Water
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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Contact ASTM International (www.astm.org) for the latest information
Designation: D1129 − 10
StandardTerminology Relating to
1
Water
This standard is issued under the fixed designation D1129; 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 (´) indicates an editorial change since the last revision or reapproval.
absolute filter rating, n—particle size above which 100% of by a specific procedure to the assumed or accepted true
particles that are trapped on or within the filter medium. value, including both precision and bias. D6161
D6161
accuracy, n—measure of the degree of conformity of a single
absorbance, n—logarithm to the base 10 of the reciprocal of
test result generated by a specific procedure to the assumed
the transmittance (T). A = log (1/ T) = –log T. D4691
or accepted true value, and includes both precision and bias.
10 10
D2777
absorption, n—release for desorption holding of a substance
within a solid by cohesive or capillary forces. D6161
accuracy, n—proportion of the observed count to the true
density of a sample. D5392
absorptivity, n—absorbance (A) divided by the product of the
sample path length (b) and the concentration (c). a = A/bc.
accuracy, n—refers to how close a measurement is to the true
D4691
or actual value. (See Terminology D1129.) D5906
accelerated erosion, n—erosionatarategreaterthangeologic
acid error, n—in very acid solutions, the activity of water is
or natural erosion. D4410
reduced (less than unity) causing a non-Nernstian response
DISCUSSION—Accelerated erosion is usually associated with anthro-
inglasselectrodes.ApositiveerrorinthepHreadingresults.
pogenicactivitiesandusuallyreducesplantcoverandincreasesrunoff.
D4127
acceptable holding time, n—any period of time less than or
acidity, n—the quantitative capacity of aqueous media to react
equal to the maximum holding time. D4841
with hydroxyl ions.
acceptable verification ratio (AVR)—ratio of the difference
between measured value of the verification sample and the acidity, n—quantitative capacity of aqueous media to react
with hydroxyl ions. D6161
known value added to the verification sample to the square
root of the sum of the squares of their associated combined
acidity, free mineral, n—the quantitative capacity of aqueous
standard uncertainties. See Eq. 8 in 16.2.13. D7282
media to react with hydroxyl ions to pH 4.3.
accretion, n—process of sediment accumulation. D4410
acidity, theoretical free mineral, n—the free mineral acidity
accumulator, n—pulsation dampener installed on the suction
thatwouldresultfromtheconversionoftheanionsofstrong
and/or discharge lines of pumps, generally plunger type, to
acids in solution to their respective free acids.
minimize pressure surges and provide uniformity of flow.
acoustic path, n—straight line between the centers of two
D6161
acoustic transducers. D5389
accuracy, n—ameasureofthedegreeofconformityofavalue
acoustic path length, n—face-to-face distance between trans-
generatedbyaspecificproceduretotheassumedoraccepted
true value, and includes both precision and bias. ducers on an acoustic path. D5389
accuracy, n—closeness of agreement between an observed
acoustic transducer, n—device that is used to generate acous-
value and an accepted reference value. Where an accepted
tic signals when driven by an electric voltage, and
reference value is not available, accuracy is a description of
conversely, a device that is used to generate an electric
a measure of the degree of conformity of a value generated
voltage when excited by an acoustic signal. D5389
acoustic travel time, n—timerequiredforanacousticsignalto
1
This terminology is under the jurisdiction ofASTM Committee D19 on Water
propagate along an acoustic path, either upstream or
and is the direct responsibility of Subcommittee D19.02 on Quality Systems,
downstream. D5389
Specification, and Statistics.
Current edition approved March 1, 2010. Published March 2010. Originally
ϵ1
action level, n—concentration of the analyte of concern at
approved in 1950. Last previous edition approved in 2006 as D1129–06a . DOI:
10.1520/D1129-10. which some further action is required or suggested. D6850
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1

---------------------- Page: 1 ----------------------
D1129 − 10
activated carbon, n—granulatedorpowderedactivatedcarbon ology,monocellularplantswithchlorophylloftenmaskedby
usedtoremovetastes,odor,chlorine,chloramines,andsome a brown or red pigment. D6161
organics from water. A family of carbonaceous substances
alkaline error, n—in alkaline solutions, where hydrogen ion
manufactured by processes that develop adsorptive
activity becomes very small, some glass electrodes respond
...

This document is not anASTM standard and is intended only to provide the user of anASTM standard an indication of what changes have been made to the previous version. Because
it may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current version
of the standard as published by ASTM is to be considered the official document.
´1
Designation:D1129–06a Designation:D1129–10
Standard Terminology Relating to
1
Water
This standard is issued under the fixed designation D1129; 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 (´) indicates an editorial change since the last revision or reapproval.
1
´ NOTE—Previously approved terms from the Terminology sections of all D19 standards have been editorially included (in
accordance with D19 bylaws) in August 2008.
absolute filter rating, n—particle size above which 100% of particles that are trapped on or within the filter medium. D6161
absorbance, n—logarithm to the base 10 of the reciprocal of the transmittance (T). A = log (1/ T) = –log T. D4691
10 10
absorption, n—release for desorption holding of a substance within a solid by cohesive or capillary forces. D6161
absorptivity, n—absorbance (A) divided by the product of the sample path length (b) and the concentration (c). a = A/bc.
D4691
accelerated erosion, n—erosion at a rate greater than geologic or natural erosion. D4410
DISCUSSION—Accelerated erosion is usually associated with anthropogenic activities and usually reduces plant cover and increases runoff.
acceptable holding time, n—any period of time less than or equal to the maximum holding time. D4841
acceptable verification ratio (AVR)—ratio of the difference between measured value of the verification sample and the known
value added to the verification sample to the square root of the sum of the squares of their associated combined standard
uncertainties. See Eq. 8 in 16.2.13. D7282
accretion, n—process of sediment accumulation. D4410
accumulator, n—pulsationdampenerinstalledonthesuctionand/ordischargelinesofpumps,generallyplungertype,tominimize
pressure surges and provide uniformity of flow. D6161
accuracy, n—a measure of the degree of conformity of a value generated by a specific procedure to the assumed or accepted true
value, and includes both precision and bias.
accuracy, n—closeness of agreement between an observed value and an accepted reference value. Where an accepted reference
value is not available, accuracy is a description of a measure of the degree of conformity of a value generated by a specific
procedure to the assumed or accepted true value, including both precision and bias. D6161
accuracy, n—measure of the degree of conformity of a single test result generated by a specific procedure to the assumed or
accepted true value, and includes both precision and bias. D2777
accuracy, n—proportion of the observed count to the true density of a sample. D5392
accuracy, n—refers to how close a measurement is to the true or actual value. (See Terminology D1129.) D5906
acid error, n—in very acid solutions, the activity of water is reduced (less than unity) causing a non-Nernstian response in glass
electrodes. A positive error in the pH reading results. D4127
acidity, n—the quantitative capacity of aqueous media to react with hydroxyl ions.
acidity, n—quantitative capacity of aqueous media to react with hydroxyl ions. D6161
acidity, free mineral, n—the quantitative capacity of aqueous media to react with hydroxyl ions to pH 4.3.
acidity, theoretical free mineral, n—the free mineral acidity that would result from the conversion of the anions of strong acids
in solution to their respective free acids.
acoustic path, n—straight line between the centers of two acoustic transducers. D5389
acoustic path length, n—face-to-face distance between transducers on an acoustic path. D5389
acoustic transducer, n—device that is used to generate acoustic signals when driven by an electric voltage, and conversely, a
device that is used to generate an electric voltage when excited by an acoustic signal. D5389
acoustic travel time, n—timerequiredforanacousticsignaltopropagatealonganacousticpath,eitherupstreamordownstream.
D5389
action level, n—concentration of the analyte of concern at which some further action is required or suggested. D6850
1
ThisterminologyisunderthejurisdictionofASTMCommitteeD19onWaterandisthedirectresponsibilityofSubcommitteeD19.02onQualitySystems,Specification,
and Statistics.
Current edition approved Sept. 1, 2006. Published September 2006. Originally approved in 1950. Last previous edition approved in 2006 as D1129–06. DOI:
10.1520/D1129-06AE01.
´1
Current edition approved March 1, 2010. Published March 2010. Originally approved in 1950. Last previous edition approved in 2006 as
...

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