Tìm thấy 14+ kết quả cho từ khóa "Solid phase extraction"
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Magnetic solid phase extraction Water Pb . Magnetic solid phase extraction Water, food Pb: 2.3. Solid phase extraction Water, cereal Cu . Solid phase extraction Water, herb, fish Pb . Vortex-assisted micro solid phase extraction Water Pb:42. Magnetic solid phase extraction Herb Pb:16.6. Journal of Hepatology 2005. Journal of Pharmaceutical Sciences and Research 2014. Commonly used herbal medicines in the United States: a review. The American Journal of Medicine 2004.
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Polyaniline-coated core-shell silica microspheres-based dispersive-solid phase extraction for detection of benzophenone-type UV filters in environmental water samples. Polyaniline-modified core-shell mesoporous silica (CSMS@PANI) nanocomposite microspheres are synthesized as adsorbent in dispersion-solid phase extraction (d-SPE) for enrichment and purification of benzophenone-type UV filters.
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A glass column having a reservoir of 250 mL on top of the column (15 cm length and 8 mm i.d.) was used as the solid phase extraction system, and 200 mg of nano-ZrO 2 /B 2 O 3 composite material was placed onto glass wool already placed in the column.
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Development of a new method for determination of aluminum (Al) in Jordanian foods and drinks: solid phase extraction and adsorption of Al 3+ -D-mannitol on carbon nanotubes.. doi: 10.1016/j.jfca . 10.1016/j.desal . doi: 10.1016/j.biopha . doi: 10.1016/j.joad . doi: 10.1515/aiht . doi: 10.1016/j.fuel . doi: 10.1007/s . 10.1016/j.saa . doi: 10.1016/j.cej .
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The accuracy of the suggested method was verified by analyzing NIST SRM 1643e, Trace Elements in Water. proposed magnetic nanoparticles as a solid phase adsorbent for the speciation of Cr(III) and Cr(VI). The accuracy of the proposed method was checked by analyzing the CRM GSBZ50009-88. The linear working range for the Cr(acac)(3) aqueous solutions was 0.1 to 1 ng. The LOD of Cr was 20 pg. FAAS was used for the determination of Cr species..
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To be aware of the important variables in performing solid phase extraction.. To be aware of the potential of solid phase extraction for on-line operation.. To be aware of the practical applications of solid phase extraction.. It is the nature of the functional groups that determines the classification of the sorbent. Figure 3.4 The five stages of operation of solid phase extraction. conditioning of the sorbent;. loading of the aqueous sample;. elution of the compound of interest..
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Microextraction methods use separation-preconcentration technique when compared to classical sample preparation techniques such as solid phase extraction and liquid phase extraction.
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The separation of the pure organic phase remains an essential obstacle in liquid phase extraction methods. The magnetic dispersive solid phase extraction method was reported to extract four dyes while our process could extract eight dyes simultaneously (Wang, Chen et al. extraction of azo dyes, including carmoisine, ponceau 4R, sunset Yellow, and Allura red from food dyes (Jangju, Farhadi et al. 5 Allura Red. 10.49.
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Residues in Fruits and Vegetables by Three- Cartridge Solid Phase Extraction/ GC- MS and LC- MS- MS. Extraction – Solid Phase Extraction/GC-MS and LC-MS-MS. GB/T Simultaneous Determination of 437 Pesticide Residues in Animal Tissues by GPC Cleanup/ GC- MS and. LC/MS/MS. GB/T Simultaneous Determination of 304 Pesticides Residues in Honey, Fruit Juice and Wine by Double- Cartridge Solid Phase Extraction/ GC- MS and LC- MS- MS.
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The structure of carmoisine is given in Figure 1. 7 Determination of food dyes in various food and in high consumption products such as beverages is an important subject in analytical chemistry and therefore various separation and preconcentration methods, including cloud point extraction (CPE), 7 − 10 solid phase extraction (SPE), 11,12 dispersive liquid–liquid microextraction (DLLME), 13 and determination techniques such as spectrophotometry differential pulse polarography, 17,18 and chromatographic
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A number of sample preparation methods have been used for the separation and preconcentration of trace analytes, such as liquid–liquid extraction (LLE), solid phase extraction (SPE), co-precipitation, and cloud point extraction (CPE). 15 The most significant advantage of these methods is that almost all of the microliter volumes of the organic extraction phase can be introduced into the detection systems while only limited volume of the concentrated solvent is introduced in conventional preconcentration
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The preconcentration and determination of metal ions in aqueous solutions have been evaluated by several techniques such as solid phase extraction (SPE), liquid-liquid extraction (LLE) and micelle mediated cloud point extraction (CPE) [7,8]. ME is divided into two categories due to the types of the extraction media as solid phase microextraction (SPME) [12,13] and liquid-liquid microextraction (LLME) [14–16]..
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“Speciation of selenium in cells by HPLC-ICP-MS after (on-chip) magnetic solid phase extraction”, Show Affiliations, 28, pp. (2012), “Nanometer-sized alumina packed microcolumn solid-phase extraction combined with field-amplified sample stacking- capillary electrophoresis for the speciation analysis of inorganic selenium in environmental water samples”, Electrophoresis pp.
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For this, 25 mL of CRM-TMDW-500 Drinking Water was taken and the solid phase extraction methods given above were applied separately.
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Recently, the development of various methods for the separation and enrichment of trace levels of Cd 2+. and Pb 2+ was reported in the literature, such as solid-phase, 7 − 9 dispersive liquid-liquid, 10 − 13 and single- drop 14 − 16 microextractions and cloud point 17 − 19 extraction and coprecipitation.
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Solid-phase microextraction.TrAC Trends in Analytical Chemistry 1999. doi: 10.1016/S . doi: 10.1016/j.trac . Aniline-silica nanocomposite as a novel solid phase microextraction fiber coating. Applications of graphene-based materials in solid-phase extraction and solid-phase microextraction..
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Molecularly imprinted polymer based on magnetic ionic liquid for. solid-phase extraction of phenolic acids. Mixture design and Doehlert matrix for optimization of the ultrasonic assisted extraction. Simultaneous GC-MS determination of free and bound phenolic acids in Slovenian red wines and chemometric characterization. Automated solid-phase extraction of phenolic acids using layered double hydroxide–alumina–polymer disk.
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Th e automatic pretreatment instruments have been constructed for both liquid-liquid ex- traction and solid-phase extraction. 8) Thurman EM, Mills MS (1998) Solid-Phase Extraction-Principles and Practice. Sons, New York 9) Pawliszyn J (1997) Solid Phase Microextraction-Theory and Practice. 10) Pawliszyn J (ed) (1999) Applications of Solid Phase Microextraction
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The proposed green analytical extraction method was applied to the analysis of tetracycline antibiotics in milk and honey samples with recovery of 50%–110% and 68%–117%, respectively.. 6 − 8 Before chro- matographic analysis, separation and preconcentration of tetracyclines in food samples have been accomplished by different extraction techniques like liquid–liquid extraction 9 and solid-phase extraction.
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Solid-phase total synthesis of cyclic peptide brachystemin A and its immunomodulating activity. The current study describes the complete solid-phase total synthesis of peptide 1 by using Kenner’s sulfonamide safety-catch linker strategy. Synthetic peptide 1 was tested for its immunomodulatory effect on different inflammatory parameters, including production of inflammatory cytokines, interleukin 2 (IL-2), tumor necrosis factor- α (TNF- α. and IL-1 β (7.5%) at a concentration of 25 µ M.