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Accelerated solvent extraction applications

Breithanpt, D.E., Simultaneons HPLC determination of carotenoids nsed as food coloring additives applicability of accelerated solvent extraction. Food Chem., 86, 449, 2004. [Pg.472]

MAE simply involves placing the sample with the solvent in specialized containers and heating the solvent using microwave energy. MAE is also sometimes called MASE, which can stand for microwave-assisted solvent extraction or microwave-accelerated solvent extraction. In any event, the extraction process is more rapid than Soxhlet extractions, can be run in batches, and reduces solvent consumption. As in the case of sonication, MAE may overcome retention of the analyte by the matrix, but analyte degradation can be a problem at higher temperatures in certain applications. [Pg.757]

Another method (EPA 3545, accelerated solvent extraction) has been validated using a variety of soil matrixes, ranging from sand to clay. In the method, conventional solvents such as methylene chloride (or a hexane-acetone mixture) are heated [100°C, (212°E)] and pressurized (2000 psi), then passed through the soil sample (this technique is also suitable for application to petroleum sludge and petroleum sediment). The method has the advantage of requiring smaller solvent volumes than is required by traditional solvent extraction techniques. [Pg.164]

Holler et al. [98] also studied the application of accelerated solvent extraction with an organic solvent, followed by clean-up and preconcentration procedures. [Pg.9]

Popp P, Keil P, Moeder M, et al. 1997. Application of accelerated solvent extraction followed by gas chromatography, high-performance liquid chromatography and gas chromatography-mass spectrometry for the determination of polycyclic aromatic hydrocarbons, chlorinated pesticides and polychlorinated dibenzo-p-dioxins and dibenzofurans in solid wastes. Journal of Chromatography A 774(l-2) 203-211. [Pg.674]

This chapter covers techniques for the extraction of semivolatile organics from solid matrices. The focus is on commonly used and commercially available techniques, which include Soxhlet extraction, automated Soxhlet extraction, ultrasonic extraction, supercritical fluid extraction (SFE), accelerated solvent extraction (ASE), and microwave-assisted extraction (MAE). The underlying principles, instrumentation, operational procedures, and selected applications of these techniques are described. In a given application, probably all the methods mentioned above will work, so it often boils down to identifying the most suitable one. Consequently, an effort is made to compare these methodologies. [Pg.139]

Accelerated solvent extraction as implemented in commercial equipment is basically discrete in nature, so it is rarely coupled to other operations of the analytical process. In fact, only in two reported applications was the static mode coupled on-line to other operations such as chromatographic separation, preconcentration and detection. Both used custom extractors as the compact design of the commercial models precluded their adaptation. [Pg.247]

Traditional methods of extraction, such as Soxhlet, have been replaced by modern techniques as supercritical fluid extraction (SFE), microwave-assisted extraction (MAE), ultrasonic extraction, and accelerated solvent extraction (ASE) during recent years. The application of specific methods to these kinds of samples has permitted the development of a great number of other extraction methods. In the following list, a brief description is given ... [Pg.1228]

Accelerated solvent extraction (ASE), also referred to as pressurized liquid extraction,53-55 is a relative newcomer to the battery of extraction techniques. This technique has been applied successfully to problems in environmental analysis56-58 and has recently begun to find a few applications in pharmaceutical analysis as well. Some of these applications have involved biological samples59,60 and solid-dosage forms such as transdermal patches.61... [Pg.189]

ISO 14507, Pretreatment of Samples for Determination of Organic Contaminants, pp. 1-15, 2003. Dionex, Extraction of Organophosphorus Pesticides Using Accelerated Solvent Extraction (ASE), Application note 319, 1-3, 1996. [Pg.886]

A sensitive HPLC multimethod was developed by BreithaupT for the determination of the carotenoid food additives (CFA) norbixin, bixin, capsanthin, lutein, canthaxanthin, b-apo-80-carotenal, b-apo-80-carotenoic acid ethyl ester, b-carotene, and lycopene in processed food using an RP C30 column. For unequivocal identification, the mass spectra of all analytes were recorded using LC-(APcl) MS. For extraction, a manual process as well as accelerated solvent extraction (ASE) was applied. Important ASE parameters were optimized. ASE was used for the first time to extract CEA from various food matrices. Average recoveries for all analytes ranged from 88.7% to 103.3% (manual extraction) and from 91.0% to 99.6% (ASE), with the exception of norbixin using ASE (67.4%). Limits of quantitation (LOQ) ranged from 0.53 to 0.79 mg/L. The presented ASE method can be used to monitor both, forbidden application of CFA or the compliance of food with legal limits. [Pg.425]

As with most chromatographic methods applied to solid samples, sample digestion and analyte extraction methods are all important. IC is finding application in the analysis of foodstuffs following sample preparation using such techniques as microwave digestion, supercritical fluid extraction, accelerated solvent extraction, and pyrohydrolysis. [Pg.2298]

In an interesting recent application, the determination of acrylamide in foodstuffs has been shown using accelerated solvent extraction followed by IC... [Pg.2298]

Sampling, sample handling, and storage and sample preparation methods are extensively covered, and modern methods such as accelerated solvent extraction, solid-phase microextraction (SPME), QuEChERS, and microwave techniques are included. Instrumentation, the analysis of liquids and solids, and applications of NMR are discussed in detail. A section on hyphenated NMR techniques is included, along with an expanded section on MRI and advanced imaging. The IR instrumentation section is focused on FTIR instrumentation. Absorption, emission, and reflectance spectroscopy are discussed, as is ETIR microscopy. ATR has been expanded. Near-IR instrumentation and applications are presented, and the topic of chemometrics is introduced. Coverage of Raman spectroscopy includes resonance Raman, surface-enhanced Raman, and Raman microscopy. [Pg.1241]

Table 5.3 The application of accelerated solvent extraction for environmental samples... Table 5.3 The application of accelerated solvent extraction for environmental samples...
Pressurized liquid extraction (PLE) is also known as pressurized solvent extraction (PSE), enhanced solvent extraction (ESE), pressurized fluid extraction (PEE), or accelerated solvent extraction (ASE ) in the literature. PLE is considered an environmentally friendly extraction technique because it requires only small volumes of solvents. PLE was primarily used for the extraction of environmental samples, such as soils and sediments. Elevated temperatures (usually between 50 and 200 °C) and pressures (between 10 and 15 MPa) are used in closed vessels, which allow extractions to be completed in a very short time. High pressure allows the solvent to remain in its liquid state even at temperatures above its boiling point, and forces it into the matrix pores. High temperatures decrease the solvent viscosity and increase metabolite solubilization, the diffusion rate, and mass transfer kinetics, thus facilitating desorption of the analytes from the plant material. Most PLE applications reported in the literature employ the same organic solvents as those commonly used in conventional solid-liquid extraction techniques. When water is used as the extraction solvent, the technique is referred to as pressurized hot water extraction (PHWE). Extractions are carried out in stainless steel extraction cells of various volumes (typically 1-250 mL). One extraction cycle is generally applied for 5-20 min at temperatures ranging from 50 to 140 °C in the vast majority of applications. [Pg.1017]

Yoshimine RV, Carreira RS, Scofield AL, Wagener ALR (2012) Regional assessment of PAHs contamination in SE Brazil using brown mussels (Perna perna Linnaeus 1758). Mar Pollut BuU http //dx. doi.org/10.1016/j. marpolbul.2012.07.013 Yusa V, Pardo O, Marti P, Pastor A (2005) Application of accelerated solvent extraction followed by gel performance chromatography and high-performance liquid chromatography for the determination of polycyclic aromatic hydrocarbons in mussel tissue. Food Addit Contam 22 482-489... [Pg.234]

Jansen, B., Nierop, K G. J., Kotte, M C., De Voogt, P., and Verstraten, J. M., 2006a. The application of Accelerated Solvent Extraction (ASE) to extract hpad biomarkers from soils. Applied Geochemistry 21,1006-1015. [Pg.112]

On the other hand, single-residue methods developed by the applicants give basic information about appropriate cleanup steps and specific determination procedures. In addition, not many laboratories other than those from the applicants are able to test the real solvent extraction efficiency. The reason is that extraction studies need radio-labeled incurred residues instead of fortified samples. Hence enforcement methods provided by the manufacturers accelerate the development of methods which meet the needs of (official) food control laboratories. [Pg.97]

Applications Open-column chromatography was used for polymer/additive analysis mainly in the 1950-1970 period (cf. Vimalasiri et al. [160]). Examples are the application of CC to styrene-butadiene copoly-mer/(additives, low-MW compounds) [530] and rubbers accelerators, antioxidants) [531]. Column chromatography of nine plasticisers in PVC with various elution solvents has been reported [44], as well as the separation of CHCI3 solvent extracts of PE/(BHT, Santonox R) on an alumina column [532]. Similarly, Santonox R and Ionol CP were easily separated using benzene and Topanol CA and dilaurylthiodipropionate using cyclohexane ethyl acetate (9 1 v/v) [533]. CC on neutral alumina has been used for the separation of antioxidants, accelerators and plasticisers in rubber extracts [534]. Column chromatography of polymer additives has been reviewed [160,375,376]. [Pg.232]

Applications As the basic process of electron transfer at an electrode is a fundamental electrochemical principle, polarography can widely be applied. Polarography can be used to determine electroreductible substances such as monomers, organic peroxides, accelerators and antioxidants in solvent extracts of polymers. Residual amounts of monomers remain in manufactured batches of (co)polymers. For food-packaging applications, it is necessary to ensure that the content of such monomers is below regulated level. Polarography has been used for a variety of monomers (styrene, a-methylstyrene, acrylic acid, acrylamide, acrylonitrile, methylmethacrylate) in... [Pg.671]

Phase separation in all solvent extraction systems, including CSSX, is greatly enhanced by the application of relatively high centrifugal forces that are generated in the separating zone of centrifugal solvent extraction contactors. Typical acceleration fields... [Pg.398]


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