Semivolatile organic compounds determining

Semivolatile Organic Compounds Determined Using Altenative Detectors... 

SW-846, is used to measure emissions of semivolatile principal organic constituents. Method 0010 is designed to determine destruction and removal efficiency (DRE) of POHCs from incineration systems. The method involves a modification of the EPA Method 5 sampling train and may be used to determine particulate emission rates from stationary sources. The method is applied to semivolatile compounds, including polychlorinated biphenyls (PCBs), chlorinated dibenzodioxins and dibenzofurans, polycyclic organic matter, and other semivolatile organic compounds. 

Pankow JF, Eigocki MP, Rosen ME, et al. 1988. Adsorption/thermal desorption with small cartridges for the determination of trace aqueous semivolatile organic compounds. Anal Chem 60 40-47. 

Clausen, P.A. and Wolkoff, P. (1997b) Evaluation of automatic thermal desorption-capillary GC for determination of semivolatile organic compounds (SVOCs) in indoor air. Journal of High Resolution Chromatography, 20, 99-108. 

Yoshida, T., Matsunaga, I. and Oda, H. (2004) Simultaneous determination of semivolatile organic compounds in indoor air by gas chromatography-mass spectrometry after solid-phase extraction. Journal of Chromatography A, 1023, 255-69. 

Hippelein M, Kaupp H, Doerr G, et al. 1993. Testing of a sampling system and analytical method for determination of semivolatile organic compounds in ambient air. Chemosphere 26(12) 2255-2263. 

An innovative technology, the Low Temperature Thermal Treatment (LT ) System was developed by Roy F. Weston, Inc. to treat soils, sludges and sediments contaminated with volatile and semivolatile organic compounds. The LT process was utilized to remediate a contaminated site near Crows Landing, CA. The processed soil was treated to less than 5 ppm of total petroleum hydrocarbons. During operation stack emissions were analyzed to determine emission characteristics. 

Liao W, Smith WD, Chiang TC, et al. 1988. Rapid, low-cost cleanup procedure for determination of semivolatile organic compounds in human and bovine adipose tissues. J Assoc Off Anal Chem 71 742- 747. 

Staniszewska M, Wolska L, NamiesnikJ. Advantages and limitations of methods for determination of volatile and semivolatile organic compounds in water samples. Pol Wiadomosci Chemiczne 2003 57 185-222 (in Polish). 

The experiments carried out diuing the January 2005 EUPHORE campaign consisted mostly of D-1, D4, D-5 and D-7 nms (Table 1). To determine the particle size, number and volume concentrations the Scanning Mobility Particle Analyzer (SMPS) was used and the particle mass was continuously monitored using TEOM. NOx and NOy species were monitored using chemiluminescence and Foiuier Transfer Infrared (FTIR) instruments. After several hours of exposure, the samples for semivolatile organic compound s (SVOC) analysis... 

The newly developed solid-phase microextraction (SPME) technique, first reported by Pawliszyn in 1989, is increasingly used for the gas chromatographic determination of a wide variety of volatile and semivolatile organic compounds in water or aqueous extracts of different substrates. Basically, it involves the extraction of specific organic analytes directly from aqueous samples or from the headspace of these samples in closed vials. The extraction is achieved onto a fused-silica fiber coated with a polymeric liquid phase. After equilibration, the fiber containing the absorbed or adsorbed analyte is removed and thermally desorbed in the hot injector port of a gas chromatograph or in an appropriate interface of a liquid chromatograph. ... 

Similar to EPA method 8270, the U.S. DOE method OMIOOR describes the determination of semivolatile organic compounds, including phthalate esters, in extracts from all types of solid waste matrices, sods, and ground water. Method OMIOOR incorporates the use of an ion trap mass detector in place of the quadrupole, typically used in earlier versions of the EPA method. 

Portable GCs GC and GC-MS remain dominant techniques for the determination of multiple volatile and semivolatile organic compounds in workplace air analysis. Portable gas chromatographs were introduced in the late 1970s and the technology has continued to evolve ever since. Most field GCs consist of an injection system with either syringe... 

Extraction processes for determining semivolatile organic compounds in food samples are not very discriminating, and the other constituents of a sample can be detrimental to the performance of the analytical method, causing deposits in the injectors of GC and GC-MS instrumentation. However, gel permeation chromatography (GPC) cleanup extracts the analyte very well from any number of other constituents. 

Kos G, Ariya PA (2006) Determination of a wide range of volatile and semivolatile organic compounds in snow by use of solid-phase micro-extraction (SPME). Anal Bioanal Chem 385 57... 

GAS CHROMATOGRAPHIC METHODS FOR THE DETERMINATION OF SEMIVOLATILE ORGANIC COMPOUNDS... 

The Determination of Semivolatile Organic Compounds by Gas Chromatography and Mass Spectrometry... 

The pressure in PLE is not a significant variable to optimize, because its role is simply to maintain the solvent in its liquid state. The main variables to optimize are extraction time and temperature, which considerably simplifies the experimental design. The main advantages of PLE are fastness (around 15 min), low amounts of toxic organic solvents are required (between 15 and 40 mL), and several samples can be extracted simultaneously (up to 24). However, the instrumentation is much more expensive than Soxhlet or even microwaves. EPA method 3545 uses PLE in the determination of semivolatile organic compounds from solid samples [139], which can be extended to solid devices used to trap PAHs in air monitoring. Furthermore, PLE has proven to be an efficient method to extract analytes from complex samples, with efficiencies comparable to Soxhlet extraction [140],... 

---