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The Special Issue of Separations, “Development of Alternative Green Sample Preparation Techniques”, provides an overview on recent trends in green sample preparation. This Special Issue of Separations collates 11 impressive contributions that describe the state-of-the-art in the development of green extraction technologies, from green materials for microextraction to the development of new sampling devices geometries for enhanced extraction efficiency and analysis throughput.

Research & information: general --- Gac --- seeds --- Momordica cochinchinensis --- extraction --- trypsin inhibitors --- optimisation --- freeze drying --- response surface methodology --- metal-organic frameworks --- analytical chemistry --- sorbent materials --- stationary phases --- sensors --- sample preparation --- green considerations --- biosorbents --- microextraction --- organic compounds --- green extraction phases --- TF-SPME --- thermal desorption --- environmental analysis --- flavor and fragrance --- onsite sampling --- in vivo analysis --- ultra-trace analysis --- bar adsorptive microextraction --- floating sampling technology --- high-performance liquid chromatography --- polar UV filters --- real matrices --- foodomics --- Brazilian yeast --- craft beer --- sensomics --- automation --- sample handling --- chemical warfare agent --- SPE --- LLE --- non-invasive sampling --- wearable devices --- extractive patches --- skin sampling --- passive sampling --- green sampling technologies --- microextraction techniques --- body fluids --- bioactive compounds --- clinical and forensic analysis --- metal extraction --- liquid–liquid extraction --- solid-phase extraction --- solid-phase microextraction --- green extraction methods --- SPME --- green chemistry --- air sampling --- complex matrices --- mass spectrometry --- n/a --- liquid-liquid extraction

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Five years of Separations are celebrated by a collection of ten feature articles: one review and nine research articles on topics of current interest. Applications of Gas Chromatography for the Analysis of Tricyclic Antidepressants in Biological Matrices are presented focusing on novel extraction techniques and novel materials used for sample preparation due to the great demand for method development for the determination of TCAs in biofluids, especially for therapeutic drug monitoring. Original research articles include the following: 1. Insights into the Mechanism of Separation of Bisphosphonates by Zwitterionic Hydrophilic Interaction Liquid Chromatography: Application to the Quantitation of Risedronate in Pharmaceuticals. 2. A method based on micro-matrix solid-phase dispersion (μ-MSPD) followed by gas-chromatography tandem mass spectrometry (GC–MS/MS), developed to analyze UV filters in personal care products. 3. The performance of a vibratory shear-enhanced process (VSEP) combined with an appropriate membrane unit for the treatment of simulated or industrial tannery wastewaters. 4. A method for the analysis of thyroid hormones by liquid chromatography-mass spectrometry that was used for the dissolution testing of single- and dual-component thyroid hormone supplements via a two-stage biorelevant dissolution procedure. 5. A method involving the collection and determination of organic and inorganic gunshot residues on hands using online in-tube solid-phase microextraction (IT-SPME) coupled to miniaturized capillary liquid chromatography with diode array detection (CapLC-DAD) and scanning electron microscopy coupled to energy dispersion X-ray (SEM-EDX), respectively, for quantifying both residues. 6. The gas chromatographic retention behavior of 16 polycyclic aromatic hydrocarbons (PAHs) and alkylated PAHs on a new ionic liquid stationary phase, 1,12-di(tripropylphosphonium) dodecane bis(trifluoromethanesulfonyl)imide (SLB®-ILPAH) intended for the separation of PAH mixtures, which was compared with the elution pattern on more traditional stationary phases: a non-polar phenyl arylene (DB-5ms) and a semipolar 50% phenyl dimethyl siloxane (SLB PAHms) column. 7. The Multiple-Stage Precursor Ion Separation and High Resolution Mass Spectrometry toward Structural Characterization of 2,3-Diacyltrehalose Family from Mycobacterium tuberculosis 8. The use of micellar electrokinetic chromatography (MEKC) for studying the hydrophobic character of modified Monomethyl Auristatin E derivatives, as Novel Candidates for the Design of Antibody–Drug Conjugates, which are promising state-of-the-art biopharmaceutical drugs for selective drug-delivery applications and the treatment of diseases such as cancer. 9. The use of recycled diatomaceous earth as the extraction phase in solid phase microextraction (SPME) technique for the determination of polycyclic aromatic hydrocarbons (PAHs) in river water samples, with separation/detection performed by gas chromatography-mass spectrometry (GC-MS).

recycled diatomaceous earth --- solid phase microextraction --- polycyclic aromatic hydrocarbons --- gas chromatography-mass spectrometry --- antibody-drug conjugate --- biopharmaceutical --- cytotoxicity --- hydrophobicity --- micellar electrokinetic chromatography --- tandem mass spectrometry --- linear ion trap --- glycolipid --- diacyltrehalose --- Mycobacterium tuberculosis --- bisphosphonates --- risedronate --- zoledronate --- tiludronate --- ZIC-HILIC --- PDA --- quantitation --- tablets --- ionic liquid stationary phase --- gas chromatography --- chromatographic selectivity --- alkylated polycyclic aromatic hydrocarbons (alkylated PAHs) --- diphenylamine --- gunshot residues --- hands --- dry cotton swab --- in-tube solid-phase extraction --- capillary liquid chromatography --- SEM-EDX --- thyroid --- dissolution --- liquid chromatography-mass spectrometry --- membrane filtration-treatment --- membrane type-operation --- membrane fouling mechanism --- tannery industrial wastewater --- vibratory shear-enhanced process (VSEP) --- tricyclic antidepressants (TCAs) --- sample treatment --- biological fluids --- UV filters --- matrix solid-phase dispersion --- μ-MSPD --- miniaturized extraction technique --- GC–MS/MS --- cosmetic analysis --- personal care products --- fragrance allergens --- preservatives --- plasticizers --- synthetic musks

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The Special Issue of Separations, “Development of Alternative Green Sample Preparation Techniques”, provides an overview on recent trends in green sample preparation. This Special Issue of Separations collates 11 impressive contributions that describe the state-of-the-art in the development of green extraction technologies, from green materials for microextraction to the development of new sampling devices geometries for enhanced extraction efficiency and analysis throughput.

Research & information: general --- Gac --- seeds --- Momordica cochinchinensis --- extraction --- trypsin inhibitors --- optimisation --- freeze drying --- response surface methodology --- metal-organic frameworks --- analytical chemistry --- sorbent materials --- stationary phases --- sensors --- sample preparation --- green considerations --- biosorbents --- microextraction --- organic compounds --- green extraction phases --- TF-SPME --- thermal desorption --- environmental analysis --- flavor and fragrance --- onsite sampling --- in vivo analysis --- ultra-trace analysis --- bar adsorptive microextraction --- floating sampling technology --- high-performance liquid chromatography --- polar UV filters --- real matrices --- foodomics --- Brazilian yeast --- craft beer --- sensomics --- automation --- sample handling --- chemical warfare agent --- SPE --- LLE --- non-invasive sampling --- wearable devices --- extractive patches --- skin sampling --- passive sampling --- green sampling technologies --- microextraction techniques --- body fluids --- bioactive compounds --- clinical and forensic analysis --- metal extraction --- liquid-liquid extraction --- solid-phase extraction --- solid-phase microextraction --- green extraction methods --- SPME --- green chemistry --- air sampling --- complex matrices --- mass spectrometry

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Nanotechnologies leverage different hierarchical levels of novel technological applications by introducing molecular functionalities into the macroworld. A novel set of applications emerges by integrating photons and quantum information with the nanoworld. The current Special Issue “Dynamics and Applications of Photon Nanostructured Systems” is shaped by innovative ideas with strong, interdisciplinary, fundamental, theoretical, and applied characteristics, and the content covers a wide range of thematic areas in physics, chemistry and engineering. The book comprises twelve original studies and three review articles addressing novel nanodevices, functionalities, nanothermodynamics, chaos, non-linear dynamics, nanoresonators and applications based on photonic nanostructured devices and photon–nanomaterial interactions.

Technology: general issues --- nanomechanical resonator --- superconducting resonator --- wave function --- unitary transformation --- Hamiltonian --- probability density --- adiabatic condition --- quantum solution --- nanohole --- microsphere --- subwavelength-scale light focusing --- high-responsivity --- ultraviolet photodetectors --- nano-scale fin isolation --- wide-band gap semiconductors --- ZnO nanorods --- two-dimensional electron gas --- visible-blind --- whispering-gallery-mode (WGM) --- sensor --- water-immersion-objective (WIO) --- microdisk --- laser --- inorganic boron-based nanostructures --- boron monoelement nanowire and nanotube --- borophene --- rare-earth boride (REB6) --- optoelectronic properties --- guided mode resonance --- figure of merit --- biosensor --- detection limits --- transition metal --- surface plasmon --- nanoparticle --- nanophotonics --- hydrogen storage --- sensing --- nuclear fusion --- energy device --- microdisk laser --- spectral modulation --- optofluidic --- coupled microdisk --- nanostructures --- optical pillar gratings --- photonic crystals --- two-photon lithography --- direct laser writing --- laser induced subwavelength ripples --- surface plasmon polaritons --- coulomb explosion --- stainless steel --- photonic nanoscience --- nanotechnology --- porous Si-SiO2 --- UV filters --- responsivity --- photodetectors --- interface/interface engineering --- charge carriers --- nanowire --- nanolaser --- metal grating --- nanocavities --- non-thermal equilibrium --- water --- entropy --- nanothermodynamics --- nanoindentation --- AFM --- electric dipole interactions --- VUV irradiation --- random walk --- EUV lithography --- chemically amplified resists --- inorganic resists --- main chain scission resists --- electron-induced chemistry --- n/a

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Nanotechnologies leverage different hierarchical levels of novel technological applications by introducing molecular functionalities into the macroworld. A novel set of applications emerges by integrating photons and quantum information with the nanoworld. The current Special Issue “Dynamics and Applications of Photon Nanostructured Systems” is shaped by innovative ideas with strong, interdisciplinary, fundamental, theoretical, and applied characteristics, and the content covers a wide range of thematic areas in physics, chemistry and engineering. The book comprises twelve original studies and three review articles addressing novel nanodevices, functionalities, nanothermodynamics, chaos, non-linear dynamics, nanoresonators and applications based on photonic nanostructured devices and photon–nanomaterial interactions.

Technology: general issues --- nanomechanical resonator --- superconducting resonator --- wave function --- unitary transformation --- Hamiltonian --- probability density --- adiabatic condition --- quantum solution --- nanohole --- microsphere --- subwavelength-scale light focusing --- high-responsivity --- ultraviolet photodetectors --- nano-scale fin isolation --- wide-band gap semiconductors --- ZnO nanorods --- two-dimensional electron gas --- visible-blind --- whispering-gallery-mode (WGM) --- sensor --- water-immersion-objective (WIO) --- microdisk --- laser --- inorganic boron-based nanostructures --- boron monoelement nanowire and nanotube --- borophene --- rare-earth boride (REB6) --- optoelectronic properties --- guided mode resonance --- figure of merit --- biosensor --- detection limits --- transition metal --- surface plasmon --- nanoparticle --- nanophotonics --- hydrogen storage --- sensing --- nuclear fusion --- energy device --- microdisk laser --- spectral modulation --- optofluidic --- coupled microdisk --- nanostructures --- optical pillar gratings --- photonic crystals --- two-photon lithography --- direct laser writing --- laser induced subwavelength ripples --- surface plasmon polaritons --- coulomb explosion --- stainless steel --- photonic nanoscience --- nanotechnology --- porous Si-SiO2 --- UV filters --- responsivity --- photodetectors --- interface/interface engineering --- charge carriers --- nanowire --- nanolaser --- metal grating --- nanocavities --- non-thermal equilibrium --- water --- entropy --- nanothermodynamics --- nanoindentation --- AFM --- electric dipole interactions --- VUV irradiation --- random walk --- EUV lithography --- chemically amplified resists --- inorganic resists --- main chain scission resists --- electron-induced chemistry