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7 SAMPLE ANALYSIS TOOLS for METALS

7.1 EX-SITU ANALYSIS

7.1.8 Fluorescence Spectrophotometry

Use: Analysis of metals with organic chelation.

Description:

Spectrophotometry encompasses a number of techniques involving measurement of the absorption spectra of narrow band widths of radiation. A simple spectrophotometer consists of the following:

  1. Radiation source.
  2. Monochromator containing a prism or grating which disperses the light so that only a limited wavelength or frequency range is allowed to irradiate the sample.
  3. Detector which measures the amount of light transmitted by the sample.

Analytes:

7. Metals
12. Mercury

Media:

Soil/Sediment Water Gas/Air
Requires extraction to liquid phase Requires extraction to liquid phase BETTER
Selectivity: Technique measures the contaminant directly.
Susceptibility to Interference: Medium.
Detection Limits : 100-1000 ppb (soil); 1-50 ppb (water).
Turnaround Time per Sample: Minutes.
Applicable To:
Screen/Identify Characterize Concentration/Extent Cleanup Performance Long-Term Monitoring
BETTER BETTER BETTER BETTER
Quantitative Data Capability: Produces quantitative data.
Technology Status: Commercially available technology with moderate field experience.
Certification/Verification: Technology has not participated in CalEPA certification and/or CSCT verification program.
Relative Cost per Analysis: Mid-range expensive.

Limitations:

EPA Methods:

206.4 Spectrophotometric, SDDC Analysis of Arsenic.
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