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Posts Tagged ‘particle’

Reducing Errors through Multi-Increment Sampling

Wednesday, August 18th, 2010

By Gregory Salata, Ph.D.

Multi-Increment Sampling

The objective of environmental sampling is to quantify contamination at a given location. In situations where sample collection may result in discrete samples of a heterogeneous nature, results may be biased based on the particle size of each sub-aliquot collected at the site. One option to help reduce the errors associated with non-uniform sample composition is to use multi-increment sampling (MIS) to create a representative, homogeneous aliquot for analysis of analytes.

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Nitrogen Dioxide Standard Released by EPA

Monday, April 19th, 2010

Nitrogen-Dioxide-Public-Health EPA released a new National Ambient Air Quality Standard (NAAQS) for nitrogen dioxide (NO2) in January. This new one-hour standard is aimed to protect public health from peak short-term exposures, especially along busy city streets and highways where NO2 exposure is the most likely. According to the EPA, NO2 exposure has been linked to impaired lung function and increased respiratory infections, especially in people with asthma.

NO2 is one of a group of highly reactive gasses. It forms quickly from emissions from cars, trucks, buses, power plants, and off-road equipment. In addition, NO2 contributes to the development of ground-level ozone and fine particle pollution.

Read more about the nitrogen dioxide standard…