ASTM D6647 Acid-Soluble Iron Testing by Atomic Absorption Spectrometry
To measure the acid-soluble iron content of granular and powdered activated carbons, ASTM D6647 employs an atomic absorption spectroscopy method. The iron is extracted using hydrochloric acid. This test method cannot be used to determine a sample's total iron concentration.
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- Overview
- Scope, Applications, and Benefits
- Test Process
- Specifications
- Instrumentation
- Results and Deliverables
Overview
ASTM D6647 is a standard test method for determining acid-soluble iron in a given substance by using atomic absorption spectroscopy, which measures the amount of iron in a given acid solution.
This test is generally used in environmental, industrial, and water laboratories for assessing iron concentration in a given substance or solution. The accurate measurement of iron concentration is necessary for quality control, assessment, and environmental protection.
Scope, Applications, and Benefits
Scope
ASTM D6647 provides procedures for determining acid-soluble iron in samples after acid digestion followed by atomic absorption measurement. The method ensures reliable quantification of iron concentration in laboratory conditions.
The standard covers sample preparation, acid dissolution of iron, instrumental analysis, and result calculation for accurate determination of iron content.
The scope includes:
Determination of acid-soluble iron concentration
Acid digestion of samples before analysis
Measurement using atomic absorption spectroscopy
Laboratory analysis of environmental and industrial samples
Quantitative evaluation of iron content
Applications
Water and environmental analysis
Industrial process monitoring
Metal contamination testing
Chemical and material quality control
Laboratory analytical studies
Benefits
Provides accurate iron concentration measurement
Supports environmental monitoring programs
Helps detect contamination or corrosion products
Ensures compliance with regulatory standards
Enables reliable chemical analysis of samples
Test Process
Sample Preparation
The sample is prepared and treated with acid to dissolve iron present in the material.
1Acid Digestion
Acid digestion converts iron into a soluble form suitable for analysis.
2Instrumental Measurement
The prepared solution is analyzed using atomic absorption spectroscopy.
3Result Calculation
The iron concentration is calculated based on the measured absorbance and calibration standards.
4Technical Specifications
| Parameter | Details |
|---|---|
| Material Tested | Water, environmental samples, or industrial materials containing iron. |
| Test Principle | Measurement of acid-soluble iron concentration using atomic absorption spectroscopy. |
| Sample Treatment | Acid digestion to dissolve iron in solution. |
| Analytical Technique | Atomic Absorption Spectroscopy (AAS). |
| Measured Parameter | Concentration of iron in the sample. |
| Result Expression | mg/L or ppm. |
| Testing Environment | Laboratory-controlled analytical conditions. |
Instrumentation Used for Testing
Atomic Absorption Spectrophotometer (AAS)
Acid Digestion Apparatus
Analytical Balance
Laboratory Glassware
Calibration Standards
Results and Deliverables
Acid-soluble iron concentration value
Instrument calibration data
Analytical measurement results
Laboratory test report with calculations
Complete ASTM D6647 analysis report
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Frequently Asked Questions
ASTM D6647 is a laboratory test method used to determine the concentration of acid-soluble iron in samples using atomic absorption spectroscopy.
Iron concentration measurement helps identify contamination, corrosion products, and water quality issues in environmental and industrial systems.
Acid digestion dissolves iron in the sample, converting it into a soluble form suitable for accurate instrumental measurement.
Factors include sample preparation, calibration accuracy, instrument stability, and potential interference from other elements.
Yes, atomic absorption spectroscopy is capable of detecting very low concentrations of iron in samples.
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