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Since its early introduction by the Russian botanist Mikhail Semyonovich Tsvet, chromatography has been undoubtedly the most powerful analytical tool in analytical chemistry. Separation, qualitative analysis, and quantitative analysis can be achieved by choosing the right conditions. Thus, numerous gas chromatographic, liquid chromatographic, and supercritical fluid chromatographic methods have been developed and applied for most types of samples and most kinds of analytes. Additionally, older varieties such as paper chromatography and thin-layer chromatography were pioneer analytical techniques in many laboratories. Especially when hyphenated to spectrometric techniques, chromatography also allows the identification of separated analytes in a single run. Highly sophisticated equipment can answer all analytical problems very quickly. Chromatographers cooperate with many scientific fields and give their lights to medical doctors, veterinarians, food scientists, biologists, dentists, archaeologists, etc. In this Special Issue, analytical chemists were invited to prove that chromatography-based separation techniques are the ultimate analytical tool and their significant contribution is reflected in ten interesting articles.

Research & information: general --- Chemistry --- Analytical chemistry --- polyamine --- steroid --- breast cancer --- liquid chromatography–tandem mass spectrometry --- serum --- photoaging --- proteomics --- genomics --- Swietenia macrophylla --- UV irradiation --- keratinocytes --- epidermal layer --- cosmetics --- natural product --- LC-MS/MS --- metabolomics --- targeted analysis --- nontargeted analysis --- sample preparation --- derivatization --- validation --- biomarkers --- mycophenolate mofetil --- mycophenolic acid --- pediatric patients --- limited sampling strategy --- multiple linear regression --- therapeutic drug monitoring --- almonds --- HPLC --- authenticity --- PCA --- tocopherols --- phenolics --- method validation --- Miang --- catechins --- caffeine --- gallic acid --- walnut septum --- UAE --- SPE --- flavonoids --- functional --- HPLC-DAD --- biotin acceptor peptide (BAP) --- biotin ligase BirA --- liquid chromatography tandem mass spectrometry (LC-MS/MS) --- multiple reaction monitoring (MRM) --- protein–protein interactions (PPIs) --- proximity utilizing biotinylation (PUB) --- greener HPTLC --- paracetamol --- simultaneous determination --- microflow LC-MS --- mLC-MS/MS --- liver fibrosis --- hemopexin --- biomarker --- polyamine --- steroid --- breast cancer --- liquid chromatography–tandem mass spectrometry --- serum --- photoaging --- proteomics --- genomics --- Swietenia macrophylla --- UV irradiation --- keratinocytes --- epidermal layer --- cosmetics --- natural product --- LC-MS/MS --- metabolomics --- targeted analysis --- nontargeted analysis --- sample preparation --- derivatization --- validation --- biomarkers --- mycophenolate mofetil --- mycophenolic acid --- pediatric patients --- limited sampling strategy --- multiple linear regression --- therapeutic drug monitoring --- almonds --- HPLC --- authenticity --- PCA --- tocopherols --- phenolics --- method validation --- Miang --- catechins --- caffeine --- gallic acid --- walnut septum --- UAE --- SPE --- flavonoids --- functional --- HPLC-DAD --- biotin acceptor peptide (BAP) --- biotin ligase BirA --- liquid chromatography tandem mass spectrometry (LC-MS/MS) --- multiple reaction monitoring (MRM) --- protein–protein interactions (PPIs) --- proximity utilizing biotinylation (PUB) --- greener HPTLC --- paracetamol --- simultaneous determination --- microflow LC-MS --- mLC-MS/MS --- liver fibrosis --- hemopexin --- biomarker

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Since its early introduction by the Russian botanist Mikhail Semyonovich Tsvet, chromatography has been undoubtedly the most powerful analytical tool in analytical chemistry. Separation, qualitative analysis, and quantitative analysis can be achieved by choosing the right conditions. Thus, numerous gas chromatographic, liquid chromatographic, and supercritical fluid chromatographic methods have been developed and applied for most types of samples and most kinds of analytes. Additionally, older varieties such as paper chromatography and thin-layer chromatography were pioneer analytical techniques in many laboratories. Especially when hyphenated to spectrometric techniques, chromatography also allows the identification of separated analytes in a single run. Highly sophisticated equipment can answer all analytical problems very quickly. Chromatographers cooperate with many scientific fields and give their lights to medical doctors, veterinarians, food scientists, biologists, dentists, archaeologists, etc. In this Special Issue, analytical chemists were invited to prove that chromatography-based separation techniques are the ultimate analytical tool and their significant contribution is reflected in ten interesting articles.

polyamine --- steroid --- breast cancer --- liquid chromatography–tandem mass spectrometry --- serum --- photoaging --- proteomics --- genomics --- Swietenia macrophylla --- UV irradiation --- keratinocytes --- epidermal layer --- cosmetics --- natural product --- LC-MS/MS --- metabolomics --- targeted analysis --- nontargeted analysis --- sample preparation --- derivatization --- validation --- biomarkers --- mycophenolate mofetil --- mycophenolic acid --- pediatric patients --- limited sampling strategy --- multiple linear regression --- therapeutic drug monitoring --- almonds --- HPLC --- authenticity --- PCA --- tocopherols --- phenolics --- method validation --- Miang --- catechins --- caffeine --- gallic acid --- walnut septum --- UAE --- SPE --- flavonoids --- functional --- HPLC-DAD --- biotin acceptor peptide (BAP) --- biotin ligase BirA --- liquid chromatography tandem mass spectrometry (LC-MS/MS) --- multiple reaction monitoring (MRM) --- protein–protein interactions (PPIs) --- proximity utilizing biotinylation (PUB) --- greener HPTLC --- paracetamol --- simultaneous determination --- microflow LC-MS --- mLC-MS/MS --- liver fibrosis --- hemopexin --- biomarker

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Marine biotoxins may pose a threat to the human consumption of seafood and seafood products. The increasing global trade and higher demand for seafood products worldwide represents a challenge for food safety authorities, policy makers, food business operators, and the scientific community, in particular, researchers devoted to environmental sciences, toxicology, and analytical chemistry. In addition, due to changes in climate conditions and technological developments, new and emerging marine toxins are being detected in regions where they were previously unknown. This Special Issue highlight studies aiming to the develop detection methods for marine biotoxins for better understanding the dynamics of accumulation/elimination of marine biotoxins and their effects on marine organisms, as well as toxin exposure studies that aim to evaluate the risks associated with the consumption of contaminated seafood.

mass mortality --- marine biotoxin --- n/a --- alamethicin --- synergy --- seafood toxin --- patulin --- Paralytic shellfish toxin --- greater blue-ringed octopus --- Alexandrium catenella --- paralytic toxicity --- Ishigaki Island --- depuration --- okadaic acid --- serum biomarker --- ecotoxicological responses --- Hapalochlaena lunulata --- sydowinin A --- purification --- PSP outbreak --- southern Chile --- posterior salivary gland --- saxitoxin --- harmful algal blooms --- gliotoxin --- seafood safety --- uptake --- immunoaffinity column --- Alexandrium --- sydowinol --- chronic exposure --- environmental neurotoxin --- assimilation --- shellfish --- LC-MS --- biotransformation --- Perna viridis --- domoic acid --- fish --- algal toxin --- warming --- tetrodotoxin --- Mesodesma donacium --- combination index --- ultrahigh high performance liquid chromatography tandem mass spectrometry

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Pesticides are used worldwide, and despite the fact that organic farming is increasing, they are still widely applied in different countries with pesticide regulations and monitoring programs. This Special Issue will cover the topic of the presence of pesticide residues in food, paying special attention to the use of modern analytical techniques based on chromatographic techniques coupled to mass spectrometry. Generic extraction methods are needed to allow the detection of pesticides with different physic-chemical properties, as well as different families of contaminants can be extracted simultaneously. Nevertheless, pluriresidue methods are still necessary for “orphan” compounds that cannot be included in multiresidue methods. Thus, in addition to targeted pesticides, the scope of this analysis can be increased and nowadays, metabolites are also detected, evaluating the degradation of pesticide residues in different food matrices.

Public health & preventive medicine --- dispersive solid-liquid extraction --- sulfonylurea herbicides --- QuEChERS --- strawberry --- cleanup --- OCPs --- PCBs --- smoked pork meat products --- pancetta --- pork neck --- pork tenderloin --- sausage --- traditional and industrial smoking --- high polar pesticides --- UHPLC-Orbitrap-MS --- QuPPe --- pluri-residue analysis --- pesticide residues --- low-residue production --- zero-residue production --- half-lives --- pre-harvest interval --- lettuce --- onion --- leek --- carrot --- parsley --- phytohormones --- acidic herbicides --- fruits and vegetables --- multifamily method --- UHPLC-MS/MS --- residues in food --- pesticides --- LC-MS/MS --- GC-MS/MS --- honey --- persistent organic pollutants (POPs) --- glyphosate --- AMPA --- organic honey --- IC-HRMS --- food safety --- tea --- pyrethroid pesticide metabolite --- ultra-high performance liquid chromatography tandem mass spectrometry --- modified QuEChERS --- herbicide residues --- non-residual production --- low-residual production --- pesticide degradation in vegetables --- dispersive solid-liquid extraction --- sulfonylurea herbicides --- QuEChERS --- strawberry --- cleanup --- OCPs --- PCBs --- smoked pork meat products --- pancetta --- pork neck --- pork tenderloin --- sausage --- traditional and industrial smoking --- high polar pesticides --- UHPLC-Orbitrap-MS --- QuPPe --- pluri-residue analysis --- pesticide residues --- low-residue production --- zero-residue production --- half-lives --- pre-harvest interval --- lettuce --- onion --- leek --- carrot --- parsley --- phytohormones --- acidic herbicides --- fruits and vegetables --- multifamily method --- UHPLC-MS/MS --- residues in food --- pesticides --- LC-MS/MS --- GC-MS/MS --- honey --- persistent organic pollutants (POPs) --- glyphosate --- AMPA --- organic honey --- IC-HRMS --- food safety --- tea --- pyrethroid pesticide metabolite --- ultra-high performance liquid chromatography tandem mass spectrometry --- modified QuEChERS --- herbicide residues --- non-residual production --- low-residual production --- pesticide degradation in vegetables

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Drug metabolism/pharmacokinetics and drug interaction studies have been extensively carried out in order to secure the druggability and safety of new chemical entities throughout the development of new drugs. Recently, drug metabolism and transport by phase II drug metabolizing enzymes and drug transporters, respectively, as well as phase I drug metabolizing enzymes, have been studied. A combination of biochemical advances in the function and regulation of drug metabolizing enzymes and automated analytical technologies are revolutionizing drug metabolism research. There are also potential drug–drug interactions with co-administered drugs due to inhibition and/or induction of drug metabolic enzymes and drug transporters. In addition, drug interaction studies have been actively performed to develop substrate cocktails that do not interfere with each other and a simultaneous analytical method of substrate drugs and their metabolites using a tandem mass spectrometer. This Special Issue has the aim of highlighting current progress in drug metabolism/pharmacokinetics, drug interactions, and bioanalysis.

human liver microsomes --- alcohol addiction --- UGT --- ultra-high-pressure liquid chromatography --- adalimumab --- procainamide --- LC-MS/MS --- DA-9805 --- paeonol --- LC-QTOF-MS/MS --- YRA-1909 --- chlorogenic acid --- immunoprecipitation --- Eurycoma longifolia --- CYP --- caffeic acid --- rat --- pharmaceutical excipient --- Korean red ginseng extract --- Stauntonia hexaphylla leaf extract --- bioanalysis --- HPLC-MS/MS --- B6 --- eurycomanone --- bioavailability --- drying technology --- GB3 --- diclofenac --- 129-Glatm1Kul/J --- aglycone --- caffeic acid O-glucuronides --- organic anion transporting polypeptide --- protein precipitation --- metabolic stability --- Fabry disease --- biopharmaceuticals --- imperatorin --- neochlorogenic acid --- gastric ulcer --- saikosaponin a --- hair --- anthraquinone --- acetyl tributyl citrate --- pharmacokinetics --- brain distribution --- mematine --- ethyl glucuronide --- pharmacokinetic --- loxoprofen --- liquid chromatography-quadrupole TOF MS --- glucuronidation --- esomeprazole --- metformin --- cytochrome P450 --- glycoside --- AUDIT score --- protein stability --- efficacy --- LC-HR/MS --- cryptochlorogenic acid --- aceclofenac --- drug interaction --- liquid chromatography-tandem mass spectrometry --- Osthenol --- plasma --- N-acetylprocainamide --- diabetes --- Drugs --- Metabolism. --- Drug metabolism --- Pharmacokinetics