This guide describes quality assurance protocols for the determination of the anions and cations in atmospheric wet deposition which include the minimum recommended requirements for the preparation of calibration standards and suggested procedures for validating laboratory measurement results. Specimens to be used in all tests shall consist of reagent grade chemicals, water, and standard solutions. Common techniques for chemical analysis include automated colorimetry; ion chromatography, flame atomic absorption spectrophotometry, electrometry, and inductively coupled plasma spectrometry. Analytical precision and bias determinations shall be done for evaluation of the reference materials. Samples for reanalysis may be selected from the evaluation of control charts and the calculation of ion and conductivity percent differences.
This abstract is a brief summary of the referenced standard. It is informational only and not an official part of the standard; the full text of the standard itself must be referred to for its use and application. ASTM does not give any warranty express or implied or make any representation that the contents of this abstract are accurate, complete or up to date.
1.1 This guide describes quality assurance (QA) protocols for the determination of the anions and cations in Atmospheric Wet Deposition (AWD) shown in Table 1.
TABLE 1 Common Techniques of Analysis for Atmospheric Wet Deposition Samples
Cl–, NO3 –, SO42–, NH4+, Ca2+, Mg2+, Na+, K+
Flame Atomic Absorption Spectrophotometry
Na+, K+, Ca2+ , Mg2+
pH, specific conductance
Inductively Coupled Plasma Spectrometry
Na+, K+, Ca2+, Mg2+
1.2 Included in this guide are minimum recommended requirements for the preparation of calibration standards and suggested procedures for validating laboratory measurement results.
1.3 This guide describes minimum requirements for the frequency of analysis of quality assurance samples and recommends procedures for the evaluation of quality assurance data.
1.4 The guide's recommendations are based upon expected anion and cation concentrations in AWD (1) and Appendix X1.
1.5 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.
1.6 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.
2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.
D596 Guide for Reporting Results of Analysis of Water
D1193 Specification for Reagent Water
D1356 Terminology Relating to Sampling and Analysis of Atmospheres
D3856 Guide for Management Systems in Laboratories Engaged in Analysis of Water
D5012 Guide for Preparation of Materials Used for the Collection and Preservation of Atmospheric Wet Deposition
D5015 Test Method for pH of Atmospheric Wet Deposition Samples by Electrometric Determination
D5085 Test Method for Determination of Chloride, Nitrate, and Sulfate in Atmospheric Wet Deposition by Chemically Suppressed Ion Chromatography
D5086 Test Method for Determination of Calcium, Magnesium, Potassium, and Sodium in Atmospheric Wet Deposition by Flame Atomic Absorption Spectrophotometry
D5111 Guide for Choosing Locations and Sampling Methods to Monitor Atmospheric Deposition at Non-Urban Locations
E200 Practice for Preparation, Standardization, and Storage of Standard and Reagent Solutions for Chemical Analysis
atmospheric deposition; atomic absorption spectrophotometry; ion chromatography; quality assurance; quality control; wet deposition;
ICS Number Code 03.120.10 (Quality management and quality assurance); 13.040.20 (Ambient atmospheres); 71.040.40 (Chemical analysis)
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