Application Notes: Environmental
An Alternative Method to RSK 175 Using a Purge and Trap Concentrator and GC–FID
February 1st 2013Due to increased concern over the hydrofracturing process and the release of methane and other chemicals into the local drinking water, a need has developed for fast and accurate analysis of methane in water.
Accurate Mass Screening for Pesticide Residue Testing
February 1st 2013The update to the SANCO guidelines in 2009 recognized the power and potential of TOF mass spectrometry for pesticide screening applications. When compared with historical screening tools (such as the use of triple-quad mass spectrometry), high performance accurate mass TOF systems offer several advantages for screening applications.
Simple and Rapid MRM Method Development for Analyzing 288 Pesticides by GC–MS-MS
September 1st 2012Gas chromatography coupled with tandem mass spectrometry (GC–MS-MS) operated in MRM mode is a powerful technology for multi-residue analysis in complex food matrices. Good GC separation combined with MS-MS selectivity facilitates monitoring hundreds of MRM transitions within a short cycle time which allows for analysis of large number of compounds in complex food matrices. Nevertheless, MRM method development is time consuming and labor-intensive, which mainly comes from mapping retention time, MRM transition set-up and post-data processing.
Rapid On-Line-SPE HPLC Determination of Carbofuran and Carbaryl in Tap and Environmental Waters
September 1st 2012N-Methylcarbamates are widely used agricultural pesticides. For their determination, reversed-phase high-performance liquid chromatography (RP-HPLC) with fluorescence detection following postcolumn derivatization, per U.S. EPA Methods 531.2 and 8318, is typically used.
High Precision Pesticide Analysis in Produce with GC Triple Quadrupole and U-SRM Mode
September 1st 2012Residuals of pesticides widely used in agriculture are monitored in foods for human consumption through the use of statutory maximum residue levels (MRLs). Regulation EC 396/2005 adopted in the European Union sets MRLs for over 500 pesticides in over 300 food commodities, many at a default value of 0.01 mg/kg (the typical routine analytical method limit of determination).
Automated Solid Phase Extraction (SPE) of Organochlorine Pesticides in Water
September 1st 2012Organochlorine pesticides are man-made organic chemicals with a history of wide spread use in both the United States as well as globally. Tending to be very persistent in the environment, they have found their way into sediments and drinking water supplies posing serious health risks. Organochlorines have a wide range of both acute and chronic health effects, including cancer, neurological damage, and birth defects. Many organochlorines are also suspected endocrine disruptors.
Improved Resolution of Triazine Herbicides in Drinking Water and Wastewater
September 1st 2012Often used for weed control, triazine herbicides have been found to have detrimental environmental and health effects. Much debate has focused on the level at which these compounds negatively impact health. To monitor and control human exposure to these herbicides, regulatory bodies have established allowable limits of triazines in drinking and wastewater.
Simplified Yet Sensitive Determination of Aniline and Nitroanilines
September 1st 2012Aniline is an organic compound widely used in the polymer, rubber, pharmaceutical, and dye industries. Aniline and its derivatives (e.g., nitroanilines) are suspected carcinogens and are highly toxic to aquatic life. Because these compounds are thermolabile and polar, the traditional analytical methods require a derivatization step prior to GC analysis.
Fast Petroleum Hydrocarbons Analysis for Underground Storage Tank Monitoring
September 1st 2012Underground storage tanks (USTs) for various petroleum-based substances such as gasoline, diesel fuel, and fuel oil are monitored for leaks as authorized by the Resource Conservation and Recovery Act (RCRA).
Enhanced Results of Diesel Range Organics Analysis with High-Temperature Gas Enhanced Chromatography
June 1st 2012Diesel range organic (DRO) compounds have boiling points similar to diesel fuel (C10–C28), ranging from 170–430 ?C. These heavy compounds are amenable to GC-FID analysis; however, important considerations should be taken to ensure reproducible results over repeated injections.
The Analysis of 1,4-Dioxane for EPA Method 522 and UCMR 3
June 1st 2012This application note will demonstrate the extraction of 1,4-dioxane from an aqueous matrix using option 1 of EPA Method 522 for 500 mL initial volume sample. It will make use of the SmartPrep Cartridge Extraction system to produce a valid initial demonstration of precision (IDP) and initial demonstration of accuracy (IDA).
This application demonstrates that stringent sensitivity requirements for the detection of potentially harmful primary aromatic amines can be fulfilled when using an Agilent 1290 Infinity LC system equipped with the 1290 large volume injection kit.
Purge-and-Trap GC Analysis of Methane in Water Samples Associated with Hydraulic Fracturing
June 1st 2012Shale gas reservoirs, such as the Marcellus shale reserve in Pennsylvania and Barnett shale reserve in Texas are a growing source of natural gas in the United States. Hydraulic fracturing or "fracking" involves pumping water, sand, and chemicals at extremely high pressure into deep underground wells to crack open hydrocarbon-rich shale formations and extract natural gas.
Microwave Assisted Extraction of Dioxins and Furans Compared to Soxhlet
February 1st 2012Microwave assisted extraction (MAE) offers significant benefits over traditional soxhlet extraction for dioxins and furans determination from environmental samples including higher sample throughput, time savings, reduced solvent and great reproducibility.
Fast Cap IC Determinations of Inorganic Anions and Cations in Drinking Water
February 1st 2012The determination of common inorganic anions and cations in drinking water is important due to the toxicity of anions (e.g., fluoride, nitrite, and nitrate) and secondary contaminants (e.g., chloride and sulfate) which can affect the water's aesthetics.