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Critical Reviews in Analytical Chemistry

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https://www.readbyqxmd.com/read/28453309/combination-of-cyclodextrin-and-ionic-liquid-in-analytical-chemistry-current-and-future-perspectives
#1
Y H Boon, M Raoov, N N M Zain, S Mohamad, H Osman
The growth in driving force and popularity of cyclodextrin (CDs) and ionic liquids (ILs) as promising materials in the field of analytical chemistry has resulted in an exponentially increase of their exploitation and production in analytical chemistry field. Cyclodextrins belong to the family of cyclic oligosaccharides composing of α-(1,4) linked glucopyranose subunits and possess a cage-like supramolecular structure. This structure enables chemical reactions to proceed between interacting ions, radical or molecules in the absence of covalent bonds...
April 28, 2017: Critical Reviews in Analytical Chemistry
https://www.readbyqxmd.com/read/28448158/corrigendum
#2
Rúbia Sversut
No abstract text is available yet for this article.
April 27, 2017: Critical Reviews in Analytical Chemistry
https://www.readbyqxmd.com/read/28441028/application-of-gc-ms-soft-ionization-for-isomeric-biological-compound-analysis
#3
Takeshi Furuhashi, Koji Okuda
Isomers are compounds with the same molecular formula. Many different types of isomers are ubiquitous and play important roles in living organisms. Despite their early discovery, the actual analysis of isomers has been tricky and has confounded researchers. Using mass spectrometry (MS) to distinguish or identify isomers is an emergent topic and challenge for analytical chemists. We review some techniques for analyzing isomers with emphasis on MS, e.g., the roles of ion reaction, hydrogen-deuterium exchange, ion mobility mass spectrometry, ion spectroscopy and energy change in producing isomer-specific fragments...
April 25, 2017: Critical Reviews in Analytical Chemistry
https://www.readbyqxmd.com/read/28426249/non-enzymatic-electrochemistry-in-characterization-and-analysis-of-steroid-compounds
#4
Jan Klouda, Jiří Barek, Karel Nesměrák, Karolina Schwarzová-Pecková
This review summarizes achievements in electrochemistry-related research of steroid-based compounds in clinical, pharmaceutical, and environmental analysis. Special attention is paid to compounds possessing none or only isolated double bonds at the steroid core. Their direct redox activity is limited to far positive/negative potentials under variety of conditions and electrode materials and relies on the functional groups attached to the steroid skeleton, or as the case may be its double bond, or moieties present at the side chain...
April 20, 2017: Critical Reviews in Analytical Chemistry
https://www.readbyqxmd.com/read/28398080/new-polymeric-materials-for-solid-phase-extraction
#5
Justyna Płotka-Wasylka, Mariusz Marć, Natalia Szczepańska, Jacek Namieśnik
Solid phase extraction (SPE) is a popular sample preparation technique, which can be applied directly in gas-solid phase and liquid-solid phase, or indirectly to solid samples by using, e.g., thermodesorption with subsequent chromatographic analysis. Although SPE can be described as a physical extraction process involving a liquid phase and a solid phase, the increased use of packed sorbent formats seems to have led to a bias toward packed sorbent SPE devices. Without any doubt, the heart of the SPE technique is the sorbent material as it has a direct influence on the selectivity, sorptive capacity, and the format or the configuration of the resultant SPE device...
April 11, 2017: Critical Reviews in Analytical Chemistry
https://www.readbyqxmd.com/read/28340309/analytical-techniques-in-lipidomics-state-of-the-art
#6
Kamil Jurowski, Kamila Kochan, Justyna Walczak, Małgorzata Barańska, Wojciech Piekoszewski, Bogusław Buszewski
Current studies related to lipid identification and determination, or lipidomics in biological samples, are one of the most important issues in modern bioanalytical chemistry. There are many articles dedicated to specific analytical strategies used in lipidomics in various kinds of biological samples. However, in such literature, there is a lack of articles dedicated to a comprehensive review of the actual analytical methodologies used in lipidomics. The aim of this article is to characterize the lipidomics methods used in modern bioanalysis according to the methodological point of view: (1) chromatography/separation methods, (2) spectroscopic methods and (3) mass spectrometry and also hyphenated methods...
March 24, 2017: Critical Reviews in Analytical Chemistry
https://www.readbyqxmd.com/read/28304192/direct-analysis-of-samples-of-various-origin-and-composition-using-specific-types-of-mass-spectrometry
#7
Hubert Byliński, Jacek Gębicki, Tomasz Dymerski, Jacek Namieśnik
One of the major sources of error that occur during chemical analysis utilizing the more conventional and established analytical techniques is the possibility of losing part of the analytes during the sample preparation stage. Unfortunately, this sample preparation stage is required to improve analytical sensitivity and precision. Direct techniques have helped to shorten or even bypass the sample preparation stage; and in this review, we comment of some of the new direct techniques that are mass-spectrometry based...
March 17, 2017: Critical Reviews in Analytical Chemistry
https://www.readbyqxmd.com/read/28287269/a-critical-review-of-analytical-methods-for-quantification-of-cefotaxime
#8
Lívia Paganini Consortti, Hérida Regina Nunes Salgado
Bacterial resistance to antibiotics is a growing phenomenon in the world. Considering the relevance of antimicrobials for population and the reduction in the registration of new antimicrobials by regulatory, proper quality control is required in order to minimize the spread of bacterial resistance and ensure the effectiveness of a treatment, as well as safety for the patient. Among the antimicrobials is cefotaxime, a drug belonging to third-generation cephalosporins, which is highly active against Gram-negative bactéria and is used to treat central nervous system infections such as meningitis and septicemia...
March 13, 2017: Critical Reviews in Analytical Chemistry
https://www.readbyqxmd.com/read/28282223/analytical-methods-for-metformin-estimation
#9
Durgawati Patel, Puspendra Kumar, Swapnil Sharma, Jaya Dwivedi
Metformin is a widely prescribed oral anti-hyperglycemic agent used in the management of non-insulin dependent diabetes mellitus (NIDDM) or type II diabetes. This article accentuates various analytical methods viz. HPLC, HPTLC, spectrophotometric, electrochemical, capillary electrophoresis and LC-MS for the estimation of metformin in pharmaceutical formulations and in biological matrices.
March 10, 2017: Critical Reviews in Analytical Chemistry
https://www.readbyqxmd.com/read/28080135/characteristics-properties-and-analytical-methods-of-amoxicillin-a-review-with-green-approach
#10
Bianca Aparecida de Marco, Jéssica Sayuri Hisano Natori, Stefany Fanelli, Eliane Gandolpho Tótoli, Hérida Regina Nunes Salgado
Bacterial infections are the second leading cause of global mortality. Considering this fact, it is extremely important studying the antimicrobial agents. Amoxicillin is an antimicrobial agent that belongs to the class of penicillins; it has bactericidal activity and is widely used in the Brazilian health system. In literature, some analytical methods are found for the identification and quantification of this penicillin, which are essential for its quality control, which ensures maintaining the product characteristics, therapeutic efficacy and patient's safety...
May 4, 2017: Critical Reviews in Analytical Chemistry
https://www.readbyqxmd.com/read/27905857/recent-development-in-sample-preparation-and-analytical-techniques-for-determination-of-quinolone-residues-in-food-products
#11
Zhichao Zhang, Hefa Cheng
Used heavily in food animal production, quinolones occur widely in food products of animal origin. Development of highly sensitive and selective analytical techniques for the detection of quinolone residues, often at trace levels, in food samples is necessary to ensure food safety and understand their public health risk. With complex matrices, food samples typically require a series of pre-treatment steps, such as powdering, homogenization, deproteinization, and filtration. This review summarizes the recent advances in extraction, concentration, and detection techniques for quinolones in food product samples, and briefly compares the advantages and limitations of major techniques...
May 4, 2017: Critical Reviews in Analytical Chemistry
https://www.readbyqxmd.com/read/27905825/saliva-volatile-biomarkers-and-profiles
#12
Maciej Milanowski, Paweł Pomastowski, Tomasz Ligor, Bogusław Buszewski
Saliva is an aqueous fluid found in the oral cavity playing fundamental role in the preservation and maintenance of oral health. Apart from higher molecular-weight constituents, it contains volatile organic compounds (VOCs) that may origin from such sources such as blood or be a result of bacterial metabolism. They can also reach the oral fluid through dissolving of volatiles from breath and consumed foods. Some of them may serve as biomarkers of various diseases, such as dimethyl disulfide (halitosis), pyridine (periodontal disease) and trimethylamine (trimethylaminuria) or occupational exposure...
May 4, 2017: Critical Reviews in Analytical Chemistry
https://www.readbyqxmd.com/read/27841672/calibration-of-passive-samplers-for-the-monitoring-of-pharmaceuticals-in-water-sampling-rate-variation
#13
Hanna Męczykowska, Paulina Kobylis, Piotr Stepnowski, Magda Caban
Passive sampling is one of the most efficient methods of monitoring pharmaceuticals in environmental water. The reliability of the process relies on a correctly performed calibration experiment and a well-defined sampling rate (Rs) for target analytes. Therefore, in this review the state-of-the-art methods of passive sampler calibration for the most popular pharmaceuticals: antibiotics, hormones, β-blockers and non-steroidal anti-inflammatory drugs (NSAIDs), along with the sampling rate variation, were presented...
May 4, 2017: Critical Reviews in Analytical Chemistry
https://www.readbyqxmd.com/read/27786540/vibrational-micro-spectroscopy-of-human-tissues-analysis-review
#14
Andrei A Bunaciu, Vu Dang Hoang, Hassan Y Aboul-Enein
Vibrational spectroscopy (Infrared (IR) and Raman) and, in particular, micro-spectroscopy and micro-spectroscopic imaging have been used to characterize developmental changes in tissues, to monitor these changes in cell cultures and to detect disease and drug-induced modifications. The conventional methods for biochemical and histophatological tissue characterization necessitate complex and "time-consuming" sample manipulations and the results are rarely quantifiable. The spectroscopy of molecular vibrations using mid-IR or Raman techniques has been applied to samples of human tissue...
May 4, 2017: Critical Reviews in Analytical Chemistry
https://www.readbyqxmd.com/read/27686474/impurities-in-drug-products-and-active-pharmaceutical-ingredients
#15
M Kątny, M Frankowski
Analytical methods should be selective and fast. In modern times, scientists strive to meet the criteria of green chemistry, so they choose analytical procedures that are as short as possible and use the least toxic solvents. It is quite obvious that the products intended for human consumption should be characterized as completely as possible. The safety of a drug is dependent mainly on the impurities that it contains. High pressure liquid chromatography and ultra-high pressure liquid chromatography have been proposed as the main techniques for forced degradation and impurity profiling...
May 4, 2017: Critical Reviews in Analytical Chemistry
https://www.readbyqxmd.com/read/27681987/application-of-microextraction-techniques-including-spme-and-mesi-to-the-thermal-degradation-of-polymers-a-review
#16
REVIEW
Massoud Kaykhaii, Matthew R Linford
Here, we discuss the newly developed micro and solventless sample preparation techniques SPME (Solid Phase Microextraction) and MESI (Membrane Extraction with a Sorbent Interface) as applied to the qualitative and quantitative analysis of thermal oxidative degradation products of polymers and their stabilizers. The coupling of these systems to analytical instruments is also described. Our comprehensive literature search revealed that there is no previously published review article on this topic. It is shown that these extraction techniques are valuable sample preparation tools for identifying complex series of degradation products in polymers...
March 4, 2017: Critical Reviews in Analytical Chemistry
https://www.readbyqxmd.com/read/27650368/a-critical-review-of-properties-and-analytical-methods-for-the-determination-of-oxytetracyline-in-biological-and-pharmaceutical-matrices
#17
REVIEW
Rúbia Adrieli Sversut, Adriane Andrade da Silva, Teófilo Fernando Mazon Cardoso, Nájla Mohamad Kassab, Marcos Serrou do Amaral, Hérida Regina Nunes Salgado
Antibiotics have an unquestionable importance in the treatment of many infections. Oxytetracycline is an antibiotic belonging to the class of tetracyclines, available for use in human and veterinary medicine. Development of analytical methods that prove the quality and efficacy of these drugs is fundamentally important to the pharmaceutical industry. In this context, the research presents an overview of the analytical profile of oxytetracycline, describing its chemical and pharmacological properties, and analytical methods for quantification of this drug in biological samples and pharmaceutical products...
March 4, 2017: Critical Reviews in Analytical Chemistry
https://www.readbyqxmd.com/read/27636675/colorimetric-sensor-arrays-for-the-detection-and-identification-of-chemical-weapons-and-explosives
#18
REVIEW
Michael J Kangas, Raychelle M Burks, Jordyn Atwater, Rachel M Lukowicz, Pat Williams, Andrea E Holmes
There is a significant demand for devices that can rapidly detect chemical-biological-explosive (CBE) threats on-site and allow for immediate responders to mitigate spread, risk, and loss. The key to an effective reconnaissance mission is a unified detection technology that analyzes potential threats in real time. In addition to reviewing the current state of the art in the field, this review illustrates the practicality of colorimetric arrays composed of sensors that change colors in the presence of analytes...
March 4, 2017: Critical Reviews in Analytical Chemistry
https://www.readbyqxmd.com/read/27547997/supercritical-fluid-extraction-of-metal-chelate-a-review
#19
REVIEW
Xin Ding, Qinli Liu, Xiongpo Hou, Tao Fang
Supercritical fluid extraction (SFE), as a new green extraction technology, has been used in extracting various metal species. The solubilities of chelating agents and corresponding metal chelates are the key factors which influence the efficiency of SFE. Other main properties of them such as stability and selectivity are also reviewed. The extraction mechanisms of mainly used chelating agents are explained by typical examples in this paper. This is the important aspect of SFE of metal ions. Moreover, the extraction efficiencies of metal species also depend on other factors such as temperature, pressure, extraction time and matrix effect...
March 4, 2017: Critical Reviews in Analytical Chemistry
https://www.readbyqxmd.com/read/27541433/recent-application-of-solid-phase-based-techniques-for-extraction-and-preconcentration-of-cyanotoxins-in-environmental-matrices
#20
REVIEW
Geaneth Pertunia Mashile, Philiswa N Nomngongo
Cyanotoxins are toxic and are found in eutrophic, municipal, and residential water supplies. For this reason, their occurrence in drinking water systems has become a global concern. Therefore, monitoring, control, risk assessment, and prevention of these contaminants in the environmental bodies are important subjects associated with public health. Thus, rapid, sensitive, selective, simple, and accurate analytical methods for the identification and determination of cyanotoxins are required. In this paper, the sampling methodologies and applications of solid phase-based sample preparation methods for the determination of cyanotoxins in environmental matrices are reviewed...
March 4, 2017: Critical Reviews in Analytical Chemistry
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