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6 SAMPLE ANALYSIS TOOLS for VOCs, SVOCS, and PESTICIDES

6.2 EX-SITU ANALYSIS

6.2.20 Immunoassay Colorimetric Kits


Use: Field screening of individual contaminants.

See 7.1.6 for use with metals and 9.1.8 for use with explosives.

Description:

Immunoassay technology relies on an antibody that is developed to have a high degree of sensitivity to the target compound. This antibody's high specificity is coupled within a sensitive colorimetric reaction that provides a visual result. The intensity of the color formed is inversely proportional to the concentration of the target analyte in the sample. The absence/determination is made by comparing the color developed by a sample of unknown concentration to the color formed with the standard containing the analyte at a known concentration.

Analytes:

1. Non-Halogenated VOCs 2. Non-Halogenated SVOCs 3. Halogenated VOCs 4. Halogenated SVOCs
5. PAHs 6. Pesticides/Herbicides 11. TPH

Media:

Soil/Sediment Water Gas/Air
BETTER BETTER Not Applicable
Selectivity: Technique measures the contaminant indirectly.
Susceptibility to Interference: Medium.
Detection Limits : 10-100 ppm (soil); 0.5-10 ppm (water).
Turnaround Time per Sample: Minutes.
Applicable To:
Screen/Identify Characterize Concentration/Extent Cleanup Performance Long-Term Monitoring
BETTER ADEQUATE BETTER ADEQUATE
Quantitative Data Capability: Data become quantitative with additional effort.
Technology Status: Commercially available technology with moderate field experience.
Certification/Verification: Technology has participated in CalEPA certification and/or CSCT verification program.
Relative Cost per Analysis: Least expensive.
Kits: $10-$25 per sample - does not include equipment.

Limitations:

EPA Methods:

Series 4000 A11 Methods for Specific Analytes.

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