ASTM D7536: Dispersive Xrf Spectrometry Testing Services
The ASTM D7536 test technique covers the estimation of chlorine by monochromatic, frequency dispersive X-beam fluorescence (MWDXRF) spectrometry in sweet-smelling hydrocarbons, their subsidiaries, and related synthetic substances. The qualities expressed in SI units are to be viewed as standard.
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- Overview
- Scope, Applications, and Benefits
- Test Process
- Specifications
- Instrumentation
- Results and Deliverables
What Is ASTM D7536 Dispersive Xrf Spectrometry?
ASTM D7536 is a standardized, non-destructive test method for determining chlorine content in aromatic hydrocarbons and related synthetic materials using monochromatic wavelength-dispersive X-ray fluorescence spectrometry (MWDXRF).
With little sample preparation, this sophisticated analytical method offers precise chlorine determination. The technique is widely used in industrial settings and labs where quick, accurate chlorine detection is crucial. The test aids quality control and regulatory compliance in the chemical industry, and results are expressed in SI units.
Applications and Benefits of ASTM D7536 Dispersive Xrf Spectrometry Testing
Scope
ASTM D7536 evaluates:
- Chlorine concentration in aromatic hydrocarbons
- Trace-level chlorine detection (up to 10 mg/kg)
- Samples with minimal preparation
- Diluted samples for higher chlorine concentrations
- Detection limits down to 0.2 mg/kg
- Quantitation limits of 0.7 mg/kg
This method allows testing of samples such as benzene, toluene, and xylene under controlled laboratory conditions.
Applications
- Petrochemical processing
- Solvent quality assessment
- Chemical manufacturing
- Aromatic hydrocarbon analysis
- Regulatory compliance testing
- Research laboratories
- Environmental monitoring
- Quality assurance programs
Benefits
- Non-destructive analysis
- Minimal sample preparation
- High sensitivity and accuracy
- Rapid testing (5–10 minutes per sample)
- Low detection limits
- Improved signal-to-noise ratio
- Suitable for routine laboratory testing
Our ASTM D7536 Testing Procedure
Sample Preparation & Excitation
The sample is placed in the XRF cell and excited using a monochromatic X-ray beam.
1Fluorescence Detection
Emitted chlorine Kα radiation is collected by the analyzer.
2Signal Measurement & Calibration
X-ray intensity is measured and converted to concentration using a calibration curve.
3Data Processing
Chlorine concentration is calculated in mg/kg.
4ASTM D7536 Test Parameters and Requirements
| Parameter | Details |
|---|---|
| Applicable Materials | Aromatic hydrocarbons (benzene, toluene, xylene) |
| Concentration Range | Up to 10 mg/kg |
| Detection Limit | 0.2 mg/kg |
| Quantitation Limit | 0.7 mg/kg |
| Analysis Time | 5–10 minutes |
Equipment and Instrumentation Used for ASTM D7536 Testing
- Monochromatic WDXRF spectrometer
- Sample cells
- Precision balance
- Calibration standards
- Data processing software
- X-ray detector system
What You Receive: Test Report, Data, and Certification
- Chlorine concentration values (mg/kg)
- Calibration reports
- Analytical reports
- Compliance reports
- Trend analysis data
ASTM D7536 Dispersive Xrf Spectrometry FAQs
Dispersive XRF measures the fluorescence emitted by a material when it is excited by X-rays. The emitted X-rays are detected and analyzed to determine the elemental composition.
When an atom absorbs energy, its outer electrons move to fill inner electron shells. As the atom returns to its normal state, it emits X-ray fluorescence radiation. This process happens without touching or damaging the sample. The emitted radiation is unique to each element, much like a fingerprint, which helps identify the elements in the sample.
It helps to determine the chemical composition of various materials, including solids, liquids, slurries, and loose powders.
It cannot measure the beryllium content and is expensive and complex.
Why Choose Infinita Lab for Dispersive Xrf Spectrometry Testing
At the core of this breadth is our network of 2,000+ accredited laboratories across the USA, offering access to over 10,000 testing methods and analytical services. From advanced materials characterization (SEM, TEM, RBS, XPS) to mechanical, chemical, environmental, biological, and standardized ASTM/ISO-compliant testing, we deliver unmatched flexibility, specialization, and scale. You are never limited by geography, facility, or methodology — Infinita Lab connects you to the right expertise and testing solution, every time.
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