Supercritical fluid extraction of pesticides and phthalate esters
Apr 5, 2004 ... Esters Following Solid Phase Extraction from Water ... prior to supercritical fluid extraction (SFE) of pesticides or phthalate esters from spiked.
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Determination of Phthalate Esters in Soil Samples by Microwave
Key Laboratory of Pesticide & Chemical Biology of Ministry of Education, College of ... Phthalate esters in the extract were determined by high performance liquid ... These techniques comprise supercritical fluid extraction (SFE), pressurized liquid ... After extraction, the vessels were removed from the microwave sample ...
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Method 3500C: Organic Extraction and Sample Preparation, part of
pressurized extraction techniques such as supercritical fluid extraction, pressurized fluid extraction, or ... Phthalate esters contaminate many types of products commonly found in the .... following pesticides at the concentrations listed below.
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Method 8081B: Organochlorine Pesticides by Gas Chromatography
The following RCRA compounds have been determined by this method .... 3550 ( ultrasonic extraction), Method 3562 (supercritical fluid extraction), or other ... Interferences by phthalate esters introduced during sample preparation can pose a.
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METHOD 3500B ORGANIC EXTRACTION AND SAMPLE
1.2 The following table lists the extraction methods, the matrix and the ... techniques such as supercritical fluid extraction or heated pressurized fluid extraction. ... 3.3 Phthalate esters contaminate many types of products commonly found in the ... The concentration for semivolatile/nonvolatile organic and pesticide analyses.
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A Guide to the Analysis of Halogenated Environmental - Restek
extraction (EPA Method 3535) can be used to extract pesticide compounds from aqueous samples that ... Pressurized Fluid/Microwave/Supercritical Fluid Extraction. Several automated .... After drying the sample extract, the extraction solvent must be reduced in volume to ... compounds, and phthalate esters. Plant and biota ...
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6. ANALYTICAL METHODS The purpose of this chapter is to
Recently, supercritical carbon dioxide as the extraction medium has received some attention (Lopez-Avila et al. 1990a; Nam et al. 1989, 1990). Methods using supercritical fluid extraction ... laboratories to collect airborne pesticides, chromosorb 102, ORB0 44, ... Interferences by phthalate esters can pose a serious problem.
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Empore Bibliography by Publication Code for: Food - 3M
Solid Phase Extraction for Polar Pesticides from High Moisture Food Crops ..... Supercritical Fluid Extraction of Pesticides and Phthalate Esters Following Solid ...
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(2‐Ethylhexyl) Phthalate (DEHP) in Municipal and Industrial Sludges
Jan 23, 2008 ... Keywords: Supercritical fluid extraction, sewage sludge, soil ... Di-(2-ethylhexyl) phthalate (DEHP) is widely used as a plasticizer in the ... extracted (after spiking) to minimize the risk of decomposition and/or ..... environmental fate of phthalate esters: a literature review. .... organochlorine pesticides from soil.
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Comprehensive Review of Applicable Supercritical Fluid Extraction
Literature pertaining to supercritical fluid extraction (SFE) is summarized in the ... The following report is organized according to the seven literature searches that ... the actual literature abstracts or, in the case of Appendix 7 (pesticides from plant and .... Nitrate esters decomposed in the modulator; however, the system.
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Analysis of Pesticides - Taylor & Francis Online
Solid-Phase microextraction (SPME), was developed in 1990 using a fused silica fiber coated on the outside with ... The analytical methods must overcome the following basic .... ater sample. NA. PA. NA. Supercritical fluid-CO. 2. NA. Methanol/w ater. (4/1). NA. NA ...... phthalate esters in foods contacted with plastics. Journal ...
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Organic waste products in agriculture ‐ monitoring the waste
A method is described for monitoring phthalate esters in organic waste ... crops after plant-uptake or leaching to groundwater. ... system can be through atmospheric deposition, pesticide ... extraction of soil with super critical fluids ( SFE) .
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Pesticide Residue Analysis in Food - Food Safety and Standards
Extraction and Clean-Up Methods in Pesticide Residue Analysis. 35. 7 ..... electron-capture detectors to phthalate esters and of phoshorus-selective detectors to ... following information is repeated from the FAO Food Inspection manual. ...... In the supercritical fluid extraction (SFE) method carbon dioxide gas is passed under.
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A Review of EPA Sample Preparation Techniques for Organic
Aug 22, 2014 ... samples are injected as an extracted liquid,. I first will discuss ... After loading a sam- ple into the ... Supercritical fluid extraction (EPA Meth- ods 3560 ..... phthalate esters. 3630C ... volatile organic compounds and pesticides.
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method 8270d - AccuStandard
The following compounds ..... hydrocarbons and pesticides, phthalate esters, organophosphate esters, nitrosamines, haloethers, aldehydes ... 3545) or supercritical fluid extraction, which involve smaller extract volumes, thereby reducing.
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Introduction. Following the initial and critical step of designing a sampling plan ( Chapter Nine) is .... Semivolatile organics (including pesticides, PCBs and herbicides) ... of samples due to the possibility of sample contamination from the phthalate esters and ..... Supercritical Fluid Extraction of Total Recoverable Petroleum.
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phthalates - ECN
Feb 1, 2004 ... benzenedicarboxylic acid, the phthalic acid esters. ..... extracted sludge and sediment, resp., by supercritical fluid extraction (SFE) with carbon ...
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Sensitive Detection of Organophosphorus Pesticides in Medicinal
Jan 12, 2016 ... Microextraction Combined with Sweeping Micellar Electrokinetic. Chromatography ... supercritical fluid chromatography (SFC),9 coupled with different ..... evaluate the extraction efficiency according to the following equation: = ..... of four phthalate esters in bottled water using ultrasound-assisted dispersive ...
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phthalate ester database references - CPSC.gov
concentrations: measurements from specimens after long-term frozen storage”. ... (DEHP) in municipal and industrial sludges of Taiwan by supercritical fluid extraction ... “Determination of phthalate esters in wine using solid-phase extraction and gas ..... “Urinary metabolite concentrations of organophosphorous pesticides, ...
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Occurrence and Fate of Organic Contaminants in Wastes
The present thesis is based on the following papers, which will be referred to by their Roman numerals. I. 11. .... improve the analytical methods for determination of pesticides and persistent organic .... efficiency and selectivity inspired us to use the supercritical fluid extraction ...... fate of phthalate esters: A literature review.
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