Application Notes: Environmental

Burning mosquito coils to repel these pests is common in many countries; however the emission of various, potentially toxic volatile organic compounds (VOCs) is cause for concern.

N-Nitrosodimethylamine and other structurally similar nitrosamines are classified as probable carcinogens by the U.S. EPA, and their presence has been reported in California drinking water since 1998.

In this application note we present an online SPE-LC method for the determination of trace-level endocrine disruptive compounds (EDCs) in seawater using the new SolEx HRP cartridge as the solid-phase extraction (SPE) phase.

A sample of ambient cabin air from a commercial airliner was collected by stir bar sorption extraction (SBSE) and analyzed by thermal desorption GCxGC-TOFMS.

Electrochemical detection (ECD) is both selective and extremely sensitive. However, relatively few compounds are electrochemically active, therefore limiting its application.

Gel-permeation chromatography (GPC) is a highly effective postextraction cleanup method for removing high molecular-weight interferences such as lipids, proteins, and pigments from sample extracts prior to analysis.

The fully automated combustion ion chromatography (CIC) system presented here combines a highly efficient combustion system with the separation power of ion chromatography (IC). CIC allows for the simultaneous, speciated trace analysis of halide (F, Cl, Br and I) and sulphur compounds (as sulphate) from sub-ppm to percent levels in any nonaqueous sample matrix.

Bisphenol A (BPA) is widely used in high production volume manufacturing of polycarbonate plastics (for example, food containers and plastic bottles) and epoxy resins.

This paper describes the use of the AB SCIEX TripleTOF 5600 LC–MS–MS system for the screening and identification of unexpected contaminants in lake water, demonstrating the value of high-resolution, accurate-mass data and retrospective data processing for the identification of nontargeted compounds.

Comprehensive two dimensional gas chromatography–mass spectrometry is a powerful method to identify target analytes in complex matrices. An example is shown of identification of pesticides in citrus oil.

Due to the mutagenic and carcinogenic properties of polycyclic aromatic hydrocarbons (PAHs), the determination of these analytes is an important field in environmental analytical chemistry.

Odor causing compounds can find their way into drinking water from a number of sources. One of the most common compounds causing a "musty" or "earthy" smell is geosmin, which is released when microbes such as blue-green algae and actinobacteria die.

Volatile organic compounds (VOCs) are one chemical group that has been linked to increase ozone levels. When present in indoor spaces at high enough levels they can produce sick building syndrome symptoms in people.

Eosin Y is an important tracer in groundwater studies for determining water migration paths and identifying the distribution of environmental pollutants.

Gel permeation chromatography (GPC) is a very effective sample clean-up technique, key to an accurate and sensitive analysis of pesticide, PCBs, mycotoxin, PAHs, and other similar compounds.

The U.S. EPA Office of Groundwater and Drinking Water released Method 524.3, "Measurement of Purgeable Organic Compounds in Water by Capillary Column Gas Chromatography/Mass Spectrometry, Version 1.0," in the Federal Register on August 3rd, 2009 (1, 2). This new method contains an updated list of 76 VOCs that includes fuel oxygenates and two emerging contaminants of interest.

Bisphenol A (BPA) is widely used in high production volume manufacturing of polycarbonate plastics (for example, food containers and plastic bottles) and epoxy resins (1).

This paper describes the use of the AB SCIEX TripleTOF 5600 LC–MS-MS system for the screening and identification of unexpected contaminants in lake water, demonstrating the value of high-resolution, accurate-mass data, and retrospective data processing for the identification of nontargeted compounds.

The U.S. EPA Office of Groundwater and Drinking Water released Method 524.3, "Measurement of Purgeable Organic Compounds in Water by Capillary Column Gas Chromatography/Mass Spectrometry, Version 1.0," in the Federal Register on August 3rd, 2009 (1, 2).

The extraction and analysis of semi-volatile organic (SVOC's) compounds can be problematic due to the wide range of analyte types and polarities.

Glyphosate (GP) is a non-selective, postemergence herbicide widely used for weed and vegetative control.

The determination of PCBs, as well as other environmental contaminants, in fish tissue requires extensive sample cleanup prior to analysis by gas chromatography with an electron capture detector (GC-ECD).

ISOLUTE EPH columns have been developed to fractionate pentane or hexane based soil extracts into aliphatic and aromatic hydrocarbon fractions (C8–C40 aliphatics, C10–C22 aromatics).

N-methyl carbamates (NMCs) are widely used as pesticides and have been reported in the environment and food.

In this study, data was collected to evaluate carryover of target analytes in subsequent blanks following high concentration samples.

The GC–MS analysis of volatile organics in drinking water according to United States Environmental Protection Agency (US EPA) Method 524.2 offers a number of analytical challenges, ranging from water handling to very low target compound concentrations.

Cyanide, an environmental contaminant, can cause serious health effects including goiters, hypothyroidism and some neuromuscular diseases. Cyanide wastewater sources include the plating and mining industries, burning of coal and plastics and effluent from publicly owned treatment works (POTW).

Increase throughput of the HPLC method for triazine herbicides by employing ultra high-speed liquid chromatography at elevated temperature on a heat stable Thermo Scientific Hypercarb column.