ASTM D5086-20

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Designation: D5086 − 01 (Reapproved 2013) D5086 − 20
Standard Test Method for
Determination of Calcium, Magnesium, Potassium, and
Sodium in Atmospheric Wet Deposition by Flame Atomic
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Absorption Spectrophotometry
This standard is issued under the fixed designation D5086; 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.
This standard has been approved for use by agencies of the U.S. Department of Defense.
1. Scope
1.1 This test method is applicable to the determination of calcium, magnesium, potassium, and sodium in atmospheric wet
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deposition (rain, snow, sleet, and hail) by flame atomic absorption spectrophotometry (FAAS) (1).
1.2 The concentration ranges are listed below. The range tested was confirmed using the interlaboratory collaborative test (see
Table 1 for a statistical summary of the collaborative test).
MDL Range of Method Range Tested
(mg/L) (2) (mg/L) (mg/L)
Calcium 0.009 0.03–3.00 0.168–2.939
Magnesium 0.003 0.01–1.00 0.039–0.682
Potassium 0.003 0.01–1.00 0.029–0.499
Sodium 0.003 0.01–2.00 0.105–1.84
1.3 The method detection limit (MDL) as given in 1.2 is based on single operator precisionprecision. (Detection2) and may be
higher or lower for other operators and laboratories. Many workers have found that this test method is reliable at lower levelslimits
vary by instrumentation. Laboratories may be able to achieve lower detection limits. The method detection limit for this method
as described in 1.2 than were tested, butwas determined in 1987 the (2precision ).and bias data presented are insufficient to justify
their use at lower levels.
1.4 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.
1.5 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility
of the user of this standard to establish appropriate safety safety, health, and healthenvironmental practices and determine the
applicability of regulatory limitations prior to use. Specific warning statements are given in 8.3, 8.7, 12.1.8, and Section 9.
1.6 This international standard was developed in accordance with internationally recognized principles on standardization
established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued
by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
2. Referenced Documents
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2.1 ASTM Standards:
D883 Terminology Relating to Plastics
D1129 Terminology Relating to Water
D1193 Specification for Reagent Water
D1356 Terminology Relating to Sampling and Analysis of Atmospheres
D2777 Practice for Determination of Precision and Bias of Applicable Test Methods of Committee D19 on Water
D4453 Practice for Handling of High Purity Water Samples
D4691 Practice for Measuring Elements in Water by Flame Atomic Absorption Spectrophotometry
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This test method is under the jurisdiction of ASTM Committee D22 on Air Quality and is the direct responsibility of Subcommittee D22.03 on Ambient Atmospheres
and Source Emissions.
Current edition approved Oct. 1, 2013March 15, 2020. Published October 2013April 2020. Originally approved in 1990. Last previous edition approved in 20082013 as
D5086 – 01 (2013).(2008). DOI: 10.1520/D5086-01R13.10.1520/D5086-20.
2
The boldface numbers in parentheses refer to a list of references at the end of this test method.
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For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM Standards
volume information, refer to the standard’sstandard’s Document Summary page on the ASTM website.
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D5086 − 20
TABLE 1 Interlaboratory Precision and Bias for Calcium, Magnesium, Potassium, and Sodium Determined from Analyte Spikes of
Synthetic Atmospheric Wet Deposition Samples
Amount Mean 95 % 95 %
A B
Number of S S Bias, Bias, Significant
t o
Element Added, Recovery, Reproducibility Repeatability
Observations mg/L % at 5 % Level
mg/L mg/L Limit Limit
Ca 18 0.168 0.160 0.0062 0.017 0.0063 0.018 −0.008 −4.76 yes
21 0.382 0.332 0.027 0.076 0.011 0.031 −0.030
...