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| Environmental Technology Listing |
Title of Listing: | | Mercury SPOT Kit |
Category: | | Characterization Technologies |
Subcategory: | * | Waste, Soil, All Listings |
Media: | | Soil |
Contaminants: | | Heavy Metals |
Web Site: | | |
Email: | | |
Technology Description: | |
The Mercury SPOT Kit is a simple, sensitive field test for the detection of mercury in soil. The test detects total mercury at concentrations as low as 1 ppm (mg/kg). The test is semiquantitative and indicates whether a soil contains greater than or less than the contamination level of interest. The test is based on a proprietary mercury-selective enzyme detection method. Briefly, a soil sample is extracted with a concentrated acid mixture to digest and oxidize all mercury present to the ionic form. The soil extract is then diluted into a buffered solution and combined with a mercury sensitive enzyme. A specially modified absorbent pad is then used to trap any mercury-enzyme complexes that may be present in the array solution. When a substrate solution is added to the absorbent pad, the presence of mercury in the sample is indicated by the formation of a blue spot. If no color is seen, the sample contains mercury at lower concentration than the detection limit. |
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Performance Status/
Limitations: | |
Performance Status:
The Mercury SPOT Kit has been commercially available since November, 1995. The kit has been used predominately in the natural gas industry for identifying, mapping, and remediation of mercury contaminated metering sites. The kit has also found a wide range of applications in verifying the remediation of mercury from industrial waste.
Limitations:
The Mercury SPOT Kit relies upon the ability of a specially modified enzyme to bind with mercury ions. High concentrations of copper, silver and gold can mimic this binding and have the potential to cause false positives. In actual use, no false positives have been observed in typical soil matrices. The Mercury SPOT Kit has been successfully modified for use in screening solid materials containing 5% copper by weight and approximately 1% silver by weight. Samples which contain naturally occurring mercury chelating compounds have been observed to cause false negatives at low ppm levels. The observed rate of false negative results is less than 5% of positive samples.
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Topics
Mercury, Technologies, Characterization
Additional Topics/Tags/Keywords
Mercury, Soil, Test Kit |
Organization: | | Mercury Science, Inc. |
Address: | | 4802 Glendarion Drive
| Phone: | Description | Number |
City: | | Durham | | Primary | (919) 493-0688 |
State/Province/Territory: | | NC | 2. | | |
Zip/Postal Code: | | 27713 | 3. | | |
Country: | | United States | 4. | Fax: | |
Branch Locations: | |
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