ASTM D1129-13
(Terminology)Standard Terminology Relating to Water
Standard Terminology Relating to Water
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Designation: D1129 − 13
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.
This standard has been approved for use by agencies of the U.S. Department of Defense.
absolute filter rating, n—particle size above which 100% of reference value is not available, accuracy is a description of
particles that are trapped on or within the filter medium. a measure of the degree of conformity of a value generated
D6161 by a specific procedure to the assumed or accepted true
value, including both precision and bias. D6161
absorbance, n—logarithm to the base 10 of the reciprocal of
the transmittance (T). A = log (1⁄ T) = –log T. D4691
accuracy, n—measure of the degree of conformity of a single
10 10
test result generated by a specific procedure to the assumed
absorption, n—release for desorption holding of a substance
or accepted true value, and includes both precision and bias.
within a solid by cohesive or capillary forces. D6161
D2777
absorptivity, n—absorbance (A) divided by the product of the
accuracy, n—proportion of the observed count to the true
sample path length (b) and the concentration (c). a = A/bc.
density of a sample. D5392
D4691
accuracy, n—refers to how close a measurement is to the true
accelerated erosion, n—erosion at a rate greater than geologic
or actual value. (See Terminology D1129.) D5906
or natural erosion. D4410
DISCUSSION—Accelerated erosion is usually associated with anthro-
acid error, n—in very acid solutions, the activity of water is
pogenic activities and usually reduces plant cover and increases runoff.
reduced (less than unity) causing a non-Nernstian response
inglasselectrodes.ApositiveerrorinthepHreadingresults.
acceptable holding time, n—any period of time less than or
equal to the maximum holding time. D4841 D4127
acceptable verification ratio (AVR)—ratio of the difference acidity, n—the quantitative capacity of aqueous media to react
between measured value of the verification sample and the with hydroxyl ions.
known value added to the verification sample to the square
acidity, n—quantitative capacity of aqueous media to react
root of the sum of the squares of their associated combined
with hydroxyl ions. D6161
standard uncertainties. See Eq. 8 in 16.2.13. D7282
acidity, free mineral, n—the quantitative capacity of aqueous
accretion, n—process of sediment accumulation. D4410
media to react with hydroxyl ions to pH 4.3.
accumulator, n—pulsation dampener installed on the suction
acidity, theoretical free mineral, n—the free mineral acidity
and/or discharge lines of pumps, generally plunger type, to
thatwouldresultfromtheconversionoftheanionsofstrong
minimize pressure surges and provide uniformity of flow.
acids in solution to their respective free acids.
D6161
acoustic path, n—straight line between the centers of two
accuracy, n—ameasureofthedegreeofconformityofavalue
acoustic transducers. D5389
generatedbyaspecificproceduretotheassumedoraccepted
true value, and includes both precision and bias.
acoustic path length, n—face-to-face distance between trans-
ducers on an acoustic path. D5389
accuracy, n—closeness of agreement between an observed
value and an accepted reference value. Where an accepted
acoustic transducer, n—device that is used to generate acous-
tic signals when driven by an electric voltage, and
conversely, a device that is used to generate an electric
1
This terminology is under the jurisdiction ofASTM Committee D19 on Water
voltage when excited by an acoustic signal. D5389
and is the direct responsibility of Subcommittee D19.02 on Quality Systems,
Specification, and Statistics.
acoustic travel time, n—timerequiredforanacousticsignalto
Current edition approved March 1, 2013. Published April 2013. Originally
propagate along an acoustic path, either upstream or
approved in 1950. Last previous edition approved in 2010 as D1129–10. DOI:
10.1520/D1129-13. downstream. D5389
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
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D1129 − 13
action level, n—concentration of the analyte of concern at algae, n—major group of lower plants, generally aquatic,
which some further action is required or suggested. D6850 photosynthetic of extremely varied morphology and
physiology, monocellular plants with chlorophyll often
activated carbon, n—granulatedorpowderedactivatedcarbon
masked by a brown or red pigment. D6161
usedtoremovetastes,odor,chlorine,chloramines,andsome
organics
...
This document is not an ASTM standard and is intended only to provide the user of an ASTM 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.
Designation: D1129 − 10 D1129 − 13
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. A number 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 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
1
This terminology is under the jurisdiction of ASTM Committee D19 on Water and is the direct responsibility of Subcommittee D19.02 on Quality Systems, Specification,
and Statistics.
Current edition approved March 1, 2010March 1, 2013. Published March 2010April 2013. Originally approved in 1950. Last previous edition approved in 20062010 as
ε1
D1129 – 06aD1129 – 10. . DOI: 10.1520/D1129-10.10.1520/D1129-13.
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—pulsation dampener installed on the suction and/or discharge lines of pumps, generally plunger type, to minimize
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.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1
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D1129 − 13
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—time required for an acoustic signal to propagate along an acoustic path, either upstream or downstream.
D5389
action level, n—concentration of the analyte of concern at which some further action is required or suggested. D6850
activated
...
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