ASTM D857 Standard Test Method for Aluminum in Water
ASTM D857 defines the water analysis process for aluminum detection through direct flame atomic absorption with nitrous oxide-acetylene flame. The method works for detecting both dissolved and total recoverable aluminum in water samples between 0.5 and 5.0 mg/L, with the potential to measure concentrations up to 50 mg/L without sample dilution, but precision data is scarce above 5.0 mg/L.
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ASTM D857 Introduction
The standard offers a reliable procedure for determining aluminum content in all types of water specimens, including natural, potable, and reagent-grade. The method fulfills regulatory needs and operational monitoring requirements in environmental and industrial water systems, specifically when aluminum interferes with biological or chemical operations.
ASTM D857 Test Method
Sample Acidification
The procedure for dissolved aluminum requires filtering and acidifying the sample to a pH value below 2 using nitric acid at the collection point.
Aluminum Detection
The measurement of aluminum concentration occurs by direct atomic absorption through a nitrous oxide-acetylene flame.
Apparatus Preparation
The glassware treatment starts with soaking it in hot hydrochloric acid solution (1:1) for two hours, followed by repeated water rinses before finishing with alcohol washes of methanol or isopropanol.
ASTM D857 Equipment and Sample Preparation
Specimen Details
The water sources include natural as well as potable and laboratory samples that require filtration and acidification for dissolved aluminum measurement or acidification for total recoverable aluminum analysis.
Specimen Dimensions
The analysis requires passing a standard water volume through a 0.45-µm membrane to determine dissolved aluminum content. The analysis requires water volumes between 100–250 mL based on sensitivity needs and anticipated concentration levels.
Results and Interpretation
The method measures aluminum concentrations as mg/L, although values above 5.0 mg/L remain quantifiable without proper precision and bias validation. Water quality and system performance assessment becomes possible through these findings, particularly in environments affected by aluminum contamination that impacts activated sludge treatment or ion exchange operations.
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Tests Related to ASTM D857
ASTM D857 is related to standards including ASTM D1687 for testing chromium in water, ASTM D1688 for testing copper in water, and ASTM D1691 for testing zinc in water.
Use of ASTM D857 Testing in Various Industries
The test serves critical purposes for water treatment facilities and industrial sites, together with environmental monitoring programs, due to its importance in aluminum level management for optimal treatment and regulatory compliance. The test serves to track aluminum remnants in boilers and cooling systems that result from chemical additive use.
Common Challenges and Troubleshooting in ASTM D857 Testing
The analysis of trace elements in water contains three main problems: glassware and reagent contamination, incorrect pH adjustment at sampling, and matrix effects that appear during flame analysis. Laboratories use multiple steps to solve measurement problems, which include strict cleaning methods combined with blank method testing and calibration procedures to produce trustworthy results.
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Where can I get the astm d857 tested?
You can share your astm d857 testing requirements with MaTestLab. MaTestLab has a vast network of material testing laboratories, spread across the USA and Canada. We support your all material testing needs ranging from specific astm d857 test to various testing techniques.
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