Integration of a microextraction system

Tokeshi, Manabu; Minagawa, Tomoko; Kitamori, Takehiko

doi:10.1016/s0021-9673(00)00683-x

Cited by 99 publications

(66 citation statements)

References 11 publications

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“…6 We applied the multilayer system to the solvent extraction of CoDMAP. For the present experiment, a microchip with a 200-µm-wide and 30-µm-deep microchannel was fabricated by the wet-etching method.…”

Section: Solvent Extraction In Multilayer Flowmentioning

confidence: 99%

“…Micro systems utilizing microchips are well known as micro total analysis systems, labs-on-a-chip or integrated chemistry labs. 1,2 In our previous papers, we demonstrated the advantages of microchips in many applications, including flow-injection analysis, 3,4 solvent extraction, 5,6 immunoassay, 7 organic synthesis 8 and laser reaction control. 9 The microchannels in the microchips were characterized by small volume, short diffusion length, large specific interface (solid/liquid or liquid/liquid), and small heat capacity.…”

Section: Introductionmentioning

confidence: 99%

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Integrated Multilayer Flow System on a Microchip

et al. 2001

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Section: Solvent Extraction In Multilayer Flowmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Integrated Multilayer Flow System on a Microchip

et al. 2001

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“…(3), are at the same level for aqueous, organo-aqueous, and organo-aqueous extraction systems: the average normalized LOD of the latter is only 20% lower than that of the former. This shows that an actual increase in the sensitivity of extraction procedures results from high εTL and high excitation powers in these studies, [25][26][27][28][29][30][31][32][33][34] and not from the solvent properties. On the contrary, the normalized LODs for organo-aqueous mixtures exhibit the same LOD decrease as do the extraction procedures, but with much less changes in methodology compared to aqueous solutions.…”

Section: Normalized Limits Of Detectionmentioning

confidence: 84%

“…The molar absorptivity of water-insoluble Co(III) tris(2-nitroso-1-naphtholate) is much higher in its PEG-or surfactant-containing solutions than its alkaline aqueous solutions (4 × 10 3 L/(mol cm)) due to micellar solubilization of the chelate in these solutions. 9 The following procedures were described previously: Co with diethyldithiocarbaminate; 39 Co and Fe with 4-(2-pyridylazo)resorcinol (PAR), 40 4-(2-thiazolylazo)resorcinol (TAR) and Xylenol Orange, 41 and dithizone; 42 Co with 2-nitroso-5-dimethylaminophenol, 29 2-nitroso-5-(N-propyl-3-sulfopropylamino)phenol (Nitroso-PSAP), 43 chiral Co complex with triethylenediamine; 31 and Fe with 1,10-phenanthroline, 32 bathophenanthroline, 44 and bathophenanthroline disulfonic acid. 45 Below, we briefly describe newly developed procedures.…”

Section: Procedures Developmentmentioning

confidence: 99%

“…We have chosen Co and Fe determination because (i) the photometric methods for these metals are both sensitive and reliable; 24 (ii) they are based on the same reaction type, chelation; (iii) these methods cover all of the selected procedure types; and (iv) optimized TLS/TLM procedures have low practical LODs under batch and flow conditions. 3,4,[25][26][27][28][29][30][31][32][33][34][35][36] A total of 39 procedures (16 for Fe and 23 for Co) were considered.…”

Section: Introductionmentioning

confidence: 99%

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Comparison of Performance Parameters of Photothermal Procedures in Homogeneous and Heterogeneous Systems

et al. 2011

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The main types of analytical procedures used in thermal-lens spectroscopy and microscopy, which are based on photometric reactions in (i) aqueous solutions, (ii) organo-aqueous mixtures, (iii) polymer-containing (nonionic surfactants or polyethylene glycol) aqueous solutions, (iv) water-organic extraction systems, and (v) two-phase aqueous extraction systems, were compared from the viewpoint of both reproducibility and sensitivity. This comparison was made by examples of the determination of cobalt and iron for batch conditions, flow determination, and detection in HPLC, flow-injection analysis (FIA), and μFIA. It was revealed that for all five types, the real analytical efficiency (a decrease in the limit of detection (LOD) as compared to spectrophotometry) is primarily determined by the reaction conditions, provided that excitation of the thermal lens is the same. Aqueous solutions provide more efficient optimization of reaction conditions than do those in organo-aqueous solutions and solvent-extraction water-organic mixtures. The best results are achieved when shifting to polymer-containing aqueous solutions and two-phase aqueous extraction systems, which decreases in the LODs by a factor of 20 -100%.

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Micro Process Technology, 2. Processing

Hessel

Noël

2012

Ullmann's Encyclopedia of Industrial Chemistry

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The article contains sections titled: 1. Reaction Engineering Potential–Transport Intensification 2. Reaction Engineering Potential—Chemical Intensification (Novel Process Windows) 2.1. Chemical Applicability 2.2. Chemical Intensification through Harsh Conditions: Novel Process Windows 2.3. Chemical Intensification through Highly Reactive Intermediates: Flash Chemistry 3. Process‐Design Intensification (Novel Process Windows) 4. Micromixers 4.1. Mixing Principles 4.2. Active and Passive Micromixers 4.3. Diffusion‐Based Micromixers 4.3.1. Y‐ and T‐Type Lamination Mixing 4.3.2. Hydrodynamic and Geometric Focusing for Lamellae Flows 4.3.3. Multilaminating Mixing 4.3.4. Cyclone Mixing 4.4. Split‐and‐Recombine Micromixers 4.4.1. Recycle‐Flow Coanda‐Effect Micromixer 4.4.2. Barrier‐Embedded Micromixer 4.4.3. Caterpillar Micromixer 4.5. Chaotic Advection Micromixers 4.5.1. Herringbone Groove Micromixer 4.5.2. Bended Micromixer 4.6. Turbulent Micromixers—Jet Mixing 4.7. Design and Fabrication of Micromixers 4.7.1. Microfabrication 4.7.2. Modeling 4.7.3. Micromixer Design Development and Related New Microfluidic Principles 4.8. Mixing Characterization 4.8.1. Analytical Techniques 4.8.2. Hydrodynamics and Mixing 4.8.3. Residence Time Distribution 4.9. Applications of Micromixer Technologies 4.9.1. Polymerization 4.9.2. Organic and Bioorganic Reactions 4.9.3. Particle Generation 4.9.4. Droplet Generation, Encapsulation, and Polymer Particle Production 4.9.5. Scale‐out and Fluid Distribution 5. Micro Heat Exchangers 5.1. Heat Exchange Fundamentals 5.2. Classification of Micro Heat Exchangers 5.2.1. Cross‐Flow Heat Exchanger 5.2.2. Counterflow Heat Exchanger 5.2.3. Electrically Powered Heat Exchangers 5.2.4. Microwave Heat Exchanger 5.2.5. Heat‐Pipe Heat Exchanger 5.3. Heat‐Transfer Characterization and Enhancement 5.4. Fouling of Micro Heat Exchangers 5.5. Scale‐out of Micro Heat Exchangers 6. Microevaporators 7. Flow Separation 7.1. State of the Art in Flow Separation 7.2. Micro Extractors 7.3. Micro Distillators/Rectificators 7.4. Micro Chromatography Devices 7.5. Micro Membrane Devices 7.6. Integrated Reaction–Separation Devices

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Integration of a microextraction system

Cited by 99 publications

References 11 publications

Integrated Multilayer Flow System on a Microchip

Integrated Multilayer Flow System on a Microchip

Comparison of Performance Parameters of Photothermal Procedures in Homogeneous and Heterogeneous Systems

Micro Process Technology, 2. Processing

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