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This book is a collection of 13 innovative papers describing the state of the art and the future perspectives in solid-phase extraction covering several analytical fields prior to the use of gas or liquid chromatographic analysis. New sorptive materials are presented including carbon nanohorn suprastructures on paper support, melamine sponge functionalized with urea–formaldehyde co-oligomers, chiral metal–organic frameworks, UiO-66-based metal–organic frameworks, and fabric phase sorptive media for various applications. Solid-phase extraction can be applied in several formats aside from the conventional cartridges or mini-column approach, e.g., online solid-phase extraction, dispersive solid-phase microextraction, and in-syringe micro-solid-phase extraction can be very helpful for analyte pre-concentration and sample clean-up. Polycyclic musks in aqueous samples, 8-Nitroguanine in DNA by chemical derivatization antibacterial diterpenes from the roots of salvia prattii, perfluoroalkyl substances (PFASs) in aater samples by bamboo charcoal-based SPE, parabens in environmental water samples, benzotriazoles as environmental pollutants, organochlorine pesticide residues in various fruit juices and water samples and synthetic peptide purification are among the applications cited in this collection. All these outstanding contributions highlight the necessity of this analytical step, present the advantages and disadvantages of each method and focus on the green analytical chemistry guidelines that have to be fulfilled in current analytical practices.

method validation --- nitrated DNA lesion --- benzotriazoles --- microextraction --- LC-MS/MS --- perfluoroalkyl acids --- antibacterial diterpenes --- in-house loaded SPE --- isotope-dilution --- polycyclic musks --- wastewater --- peptide --- HPLC-DAD --- chiral compounds --- derivatization --- extraction --- water --- enantiomeric excess --- sample preparation --- metal-organic frameworks --- solid-phase extraction --- FPSE --- melamine sponge --- preparative high-performance liquid chromatography --- GC–MS/MS --- solid phase peptide synthesis --- HPLC-PDA --- Salvia prattii --- in-syringe micro solid-phase extraction --- organochlorine pesticides --- hydrophilic solid-phase extraction --- response surface methodology --- IBD --- graphene --- sorptive phase --- paper --- liquid chromatography–tandem mass spectrometry --- carbon nanohorns --- gradient elution --- peroxynitrite --- bamboo charcoal --- gas chromatography-mass spectrometry --- environmental samples --- parabens --- solid phase extraction (SPE) --- preparative purification --- antidepressants --- online solid-phase extraction --- organic pollutants --- urea-formaldehyde co-oligomers --- personal care products --- dispersive solid-phase extraction --- fabric phase sorptive extraction --- analyte partitioning

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Sample preparation is and will always be the most important step in chemical analysis. Numerous techniques, methods, methodologies, and approaches are published in the literature offering a wide range of analytical tools to the lab practitioner. Analytical scientists all over the world are trying to develop protocols for a plethora of analytes in various sample matrices. In the last decade, sample pre-treatment advances have followed green chemistry and green analytical chemistry demands, focusing on miniaturization and automation, using the least possible amount of organic solvents. The question is how far we have been till now, and what the future perspectives are. To answer this question, analytical chemists were invited to share their experience in the field and report on the recent advances in sample-preparation approaches. The outcome of our invitation was eleven excellent manuscripts, including four review articles and seven original research articles in the first edition of the Special Issue “Sample Preparation-Quo Vadis: Current Status of Sample Preparation Approaches”.The second edition is a collection of ten significant contributions to the field of sample preparation. It includes two highly interesting and comprehensive review articles and eight innovative research articles.

Research & information: general --- Chemistry --- Analytical chemistry --- sample preparation --- matrix solid-phase dispersion --- salting-out --- homogenous liquid-liquid extraction --- bisphenol --- bee pollen --- tricyclic antidepressants --- urine samples --- bar adsorptive microextraction (BAμE) --- novel sorbent phases --- biomaterials waste --- flotation sampling technology --- GC-MS --- amino acids --- chocolate --- derivatization --- HPLC --- fluorescence --- automation --- flow injection --- inductively coupled plasma --- sol-gel --- solid-phase extraction --- metals --- molecular imprinted polymer --- interaction mechanism --- template-monomer interaction --- MIP-template interaction --- microwave-assisted extraction --- tocopherols --- phenolics --- flavonoids --- authenticity --- HPLC-UV --- bismuth oxide --- API particle size --- API morphology --- film-coated tablets --- Raman spectroscopy --- ImageJ --- tablet disintegration --- green extraction techniques --- microextraction techniques --- biological samples --- food samples --- environmental samples --- carbaryl --- cassia bark (Senna siamea Lam.) --- smartphone-based digital image analysis --- 1-naphthol --- peroxidase enzyme --- raman spectroscopy --- carriers --- sample holders --- gold layer --- cuvette --- ethanol --- urine --- volatile compounds --- biological fluids --- n/a