Analytical Services for the Environmental Sector

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Waste Derived Fuels

As the world population continues to grow and expand, so does the volume of waste produced. As a way of reducing dependency on fossil fuels, and also utilising the guaranteed supply of Municipal Solid Waste (MSW), an alternative fuel supply known as Waste Derived Fuel is becoming progressively more popular as a viable alternative to traditional fuels.

Knowing your A/A Split from your Elbow

The term Total Petroleum Hydrocarbons (TPH) still remains poorly defined so that TPH data provided by laboratories is prone to disparity according to the analytical procedure undertaken. This data may be required for regulatory compliance, risk assessment, investigation or remediation. An appreciation of the methodology and terminology will therefore assist in scheduling the most appropriate analytical procedure.

Low level hexavalent chromium in water samples

The most common forms of chromium that occur in natural waters in the environment are:

Trivalent chromium (chromium-3) and Hexavalent chromium (chromium-6)

Trivalent chromium is an essential human dietary element. It is found in many vegetables, fruits, meats, grains, and yeast. Hexavalent chromium occurs naturally in the environment from the erosion of natural chromium deposits. It can also be produced by industrial processes. There are demonstrated instances of chromium being released to the environment by leakage, poor storage, or inadequate industrial waste disposal practices.

 

Environmental Forensics

Environmental forensic chemistry investigations are critical to the determination of liability under a variety of scenarios, including but not limited to:

-Allocation of responsibilities and costs for property transfer

-Litigation pertaining to insurance claims

-Toxic claims

-Marine pollution events such as oil spills

Environmental forensic evaluations may also be a key component for liability management in site remediation activities, including legacy site clean-up. Chemtest uses an interdisciplinary approach to problem solving for environmental forensic investigations. An essential element of our success is effective and defensible environmental sampling and analysis design together with planning for complex environmental problems. The use of environmental forensic tools provides multiple lines of evidence in the allocation of responsible parties at contaminated sites.

 

Speciated Mercury

Mercury is a naturally occurring element that is found in air, water and soil. The symbol for mercury is Hg and it comes from its Greek name, hydrargyrum, which means “liquid silver”

Mercury exists in various forms:

• Elemental mercury
• Inorganic mercury compounds
• Organic mercury compounds

The environmental mobility and toxicity of mercury in a soil profile depend on its speciation. Alkyl mercury species such as methylmercury are at least an order of magnitude more mobile than inorganic mercury species, and thus are more toxic and more readily bioaccumulated. (EPA Method 3200 – http://1.usa.gov/1VVzkis ).

Scheduling Environmental Samples for Metals Testing

What is the difference between Metals analysis by ICP-OES and ICP-MS?
Inductively Coupled Plasma (ICP) methodologies utilise an argon plasma operating at approximately 10000oK (significantly hotter than the surface of the sun).

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