ASTM D5086 Standard Test Method for Determination of Calcium, Magnesium, Potassium, and Sodium in Atmospheric Wet Deposition by Flame Atomic Absorption Spectrophotometry
ASTM D5086 -用火焰原子吸收分光光度法测定大气作用下湿沉积物中钙,镁,钾和钠含量的标准试验方法
This test method may be used for the determination of calcium, magnesium, potassium, and sodium in atmospheric wet deposition samples.
Emphasis is placed on the easily contaminated quality of atmospheric wet deposition samples due to the low concentration levels of dissolved metals commonly present.
Annex A1 represents cumulative frequency percentile concentration plots of calcium, magnesium, potassium, and sodium obtained from analyses of over five thousand wet deposition samples. These data may be used as an aid in the selection of appropriate calibration standard concentrations. (3)
1. Scope
1.1 This test method is applicable to the determination of calcium, magnesium, potassium, and sodium in atmospheric wet 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
(mg/L) (2) |
Range of Method
(mg/L) |
Range Tested
(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) is based on single operator precision (2) and may be higher or lower for other operators and laboratories. Many workers have found that this test method is reliable at lower levels than were tested, but the precision and bias data presented are insufficient to justify their use at lower levels.
1.4 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 and health 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.
2. Referenced Documents (purchase separately)
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 Ultra-Pure Water Samples
D4691 Practice for Measuring Elements in Water by Flame Atomic Absorption Spectrophotometry
D5012 Guide for Preparation of Materials Used for the Collection and Preservation of Atmospheric Wet Deposition
E131 Terminology Relating to Molecular Spectroscopy
E275 Practice for Describing and Measuring Performance of Ultraviolet and Visible Spectrophotometers
E694 Specification for Laboratory Glass Volumetric Apparatus
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 Ultra-Pure Water Samples
D4691 Practice for Measuring Elements in Water by Flame Atomic Absorption Spectrophotometry
D5012 Guide for Preparation of Materials Used for the Collection and Preservation of Atmospheric Wet Deposition
E131 Terminology Relating to Molecular Spectroscopy
E275 Practice for Describing and Measuring Performance of Ultraviolet and Visible Spectrophotometers
E694 Specification for Laboratory Glass Volumetric Apparatus
Index Terms
atmospheric wet deposition; atomic absorption; calcium; magnesium; potassium; precipitation; sodium; Atmospheric wet deposition (AWD); Beer's law; Calcium content--atmospheric analysis; Contamination--atmospheric; FAAS (flame atomic absorption spectrometry); Hail; Magnesium content--atmospheric analysis; Method detection limit (MDL); Potassium content--atmospheric analysis; Rain; Sleet; Snow; Sodium content--atmospheric analysis; Spectrophotometry--atomic absorption;