scholarly journals FIRST EDITION

2017 ◽  
Vol 1 (1) ◽  
Author(s):  
Martin Steppe
Keyword(s):  
Systematic Review ◽  
Analytical Methods ◽  
Analytical Techniques ◽  
Editorial Team ◽  
Analytical Determination ◽  
Porto Alegre ◽  
Analytical Research

Analysis of drugs requires standing search for reliable analytical techniques, essential to assure their identification and concentration in several matrices. In this context, the edition of scientific works has the objective of contributing with the researchers of the analytical area collaborating with the diffusion and knowledge related to this subject.The editorial team is celebrating the first volume of the journal Drug Analytical Research, a result of the effort of professors and collaborators who have taken up the challenge of expanding the analytical research involving therapeutic substances.The scope of the journal is focused on the analytical determination of drugs in different matrices, impurities, propositions of new analytical methods, as well as the systematic review of issues of separation and quantitative determination.At this moment, we would like to invite to access the website of the journal through the address (http://seer.ufrgs.br/index/php/dar) and appreciate the articles and reviews included in this first edition.Finally, we thank all those who supported this project, especially to Dra. Amanda Thomas Barden, who helped effectively in all stages of publication of this journal. Porto Alegre, August 28th, 2017Martin SteppeLead Editor                                                                                                                                                                                                                               

Analytical Methods in Tracing Honey Authenticity

2017 ◽  
Vol 100 (4) ◽  
pp. 827-839 ◽  
Author(s):  
Jelena Trifković ◽  
Filip Andrić ◽  
Petar Ristivojević ◽  
Etil Guzelmeric ◽  
Erdem Yesilada
Keyword(s):  
Stable Isotopes ◽  
Natural Product ◽  
Cross Section ◽  
Analytical Methods ◽  
Scientific Community ◽  
Analytical Techniques ◽  
Consumer Health ◽  
Wide Range ◽  
Medicinal Properties

Abstract Honey is a precious natural product that is marketed with a wide range of nutritional and medicinal properties. However, it is also a product subjected to frequent adulteration through mislabeling and mixing with cheaper and lower-quality honeys and various sugar syrups. In that sense, honey authentication regarding its genuine botanical and geographical origins, as well as the detection of any adulteration, is essential in order to protect consumer health and to avoid competition that could create a destabilized market. Various analytical techniques have been developed to detect adulterations in honey, including measuring the ratios of stable isotopes (mostly 13C/12C) and the use of different spectroscopic, chromatographic, and electrochemical methods. This review aims to provide a cross-section of contemporary analytical methods used for the determination of honey authenticity in order to help the scientific community engaged in the field of honey chemistry make appropriate choices and select the best applications that should lead to improvements in the detection and elimination of fraudulent practices in honey manufacturing.

scholarly journals An Overview of the Analytical Methods for the Determination of Organic Ultraviolet Filters in Cosmetic Products and Human Samples

Molecules ◽  
2021 ◽  
Vol 26 (16) ◽  
pp. 4780
Author(s):  
Izabela Narloch ◽  
Grażyna Wejnerowska
Keyword(s):  
Analytical Methods ◽  
Limit Of Detection ◽  
Biological Fluids ◽  
Analytical Techniques ◽  
Detection Accuracy ◽  
Uv Filters ◽  
Cosmetic Products ◽  
Monitoring Protocols ◽  
Accuracy And Repeatability

UV filters are a group of compounds commonly used in different cosmetic products to absorb UV radiation. They are classified into a variety of chemical groups, such as benzophenones, salicylates, benzotriazoles, cinnamates, p-aminobenzoates, triazines, camphor derivatives, etc. Different tests have shown that some of these chemicals are absorbed through the skin and metabolised or bioaccumulated. These processes can cause negative health effects, including mutagenic and cancerogenic ones. Due to the absence of official monitoring protocols, there is an increased number of analytical methods that enable the determination of those compounds in cosmetic samples to ensure user safety, as well as in biological fluids and tissues samples, to obtain more information regarding their behaviour in the human body. This review aimed to show and discuss the published studies concerning analytical methods for the determination of organic UV filters in cosmetic and biological samples. It focused on sample preparation, analytical techniques, and analytical performance (limit of detection, accuracy, and repeatability).

Analytical determination of bifurcations in an impact oscillator

1994 ◽  
Vol 347 (1683) ◽  
pp. 353-364 ◽  
Keyword(s):  
Analytical Methods ◽  
Coefficient Of Restitution ◽  
Analytical Determination ◽  
Impact Oscillator ◽  
Grazing Bifurcation ◽  
Codimension Two ◽  
Dimension One ◽  
Codimension Two Bifurcation ◽  
Grazing Bifurcations

It is well known that some solutions for a sinusoidally driven oscillator with linear stiffness and impacts at rigid stops modelled with a coefficient of restitution impact law can be located analytically. Recently, new co-dimension one bifurcations called grazing bifurcations have been found in such systems. Here we present analytical results which show how the type of grazing bifurcation changes with parameter, and that when the type of grazing bifurcation changes a codimension two bifurcation occurs. The simplest grazing bifurcations involve orbits of period-1, but we show that the same analytical methods can be used to locate some subharmonics and their bifurcations.

scholarly journals A Review of Analytical Methods for Codeine Determination

Molecules ◽  
2021 ◽  
Vol 26 (4) ◽  
pp. 800
Author(s):  
Rimadani Pratiwi ◽  
Eka Noviana ◽  
Rizky Fauziati ◽  
Daniel Blascke Carrão ◽  
Firas Adinda Gandhi ◽  
...  
Keyword(s):  
Analytical Methods ◽  
Opioid Analgesic ◽  
Analytical Techniques ◽  
Pharmaceutical Formulations ◽  
Drug Misuse ◽  
Public Health Issue ◽  
Over The Counter ◽  
Parent Molecule ◽  
Opioid Drugs

Codeine is derived from morphine, an opioid analgesic, and has weaker analgesic and sedative effects than the parent molecule. This weak opioid is commonly used in combination with other drugs for over-the-counter cough relief medication. Due to the psychoactive properties of opioid drugs, the easily obtained codeine often becomes subject to misuse. Codeine misuse has emerged as a concerning public health issue due to its associated adverse effects such as headache, nausea, vomiting, and hemorrhage. Thus, it is very important to develop reliable analytical techniques to detect codeine for both quality control of pharmaceutical formulations and identifying drug misuse in the community. This review aims to provide critical outlooks on analytical methods applicable to the determination of codeine.

scholarly journals Modern Analytical Techniques for Detection of Bacteria in Surface and Wastewaters

2021 ◽  
Vol 13 (13) ◽  
pp. 7229
Author(s):  
Alexandra Canciu ◽  
Mihaela Tertis ◽  
Oana Hosu ◽  
Andreea Cernat ◽  
Cecilia Cristea ◽  
...  
Keyword(s):  
Water Resources ◽  
Analytical Methods ◽  
Electrochemical Sensors ◽  
Analytical Techniques ◽  
Alternative Methods ◽  
Surface Enhanced ◽  
Surface Enhanced Raman ◽  
Enhanced Raman Scattering ◽  
All Diseases

Contamination of surface waters with pathogens as well as all diseases associated with such events are a significant concern worldwide. In recent decades, there has been a growing interest in developing analytical methods with good performance for the detection of this category of contaminants. The most important analytical methods applied for the determination of bacteria in waters are traditional ones (such as bacterial culturing methods, enzyme-linked immunoassay, polymerase chain reaction, and loop-mediated isothermal amplification) and advanced alternative methods (such as spectrometry, chromatography, capillary electrophoresis, surface-enhanced Raman scattering, and magnetic field-assisted and hyphenated techniques). In addition, optical and electrochemical sensors have gained much attention as essential alternatives for the conventional detection of bacteria. The large number of available methods have been materialized by many publications in this field aimed to ensure the control of water quality in water resources. This study represents a critical synthesis of the literature regarding the latest analytical methods covering comparative aspects of pathogen contamination of water resources. All these aspects are presented as representative examples, focusing on two important bacteria with essential implications on the health of the population, namely Pseudomonas aeruginosa and Escherichia coli.

Proton pump inhibitors: recent developments in analytical methodologies

2015 ◽  
Vol 34 (1-2) ◽  
Author(s):  
Mehul M. Patel ◽  
Satish D. Bhuva ◽  
Miketa M. Patel
Keyword(s):  
Liquid Chromatography ◽  
Proton Pump Inhibitors ◽  
Proton Pump ◽  
Analytical Methods ◽  
High Performance ◽  
Biological Fluids ◽  
Ultra Violet ◽  
Analytical Techniques ◽  
Pharmaceutical Chemistry

AbstractAn extensive survey of the literature published in various analytical and pharmaceutical chemistry-related journals have been conducted, and the instrumental analytical methods that were developed and used for the determination of proton pump inhibitors in bulk drugs, formulations, and biological fluids have been reviewed. This review covers the time period from 1990 to 2011 during which 80 analytical methods, including all types of spectrophotometric and chromatographic techniques were reported. High-performance liquid chromatography (HPLC) with ultra violet (UV) detection was found to be the technique of choice for many workers, and more than 50 methods were based on liquid chromatography (LC) and ultra violet (UV). A critical analysis of the reported data was carried out and the present state of the art of the analytical techniques for the determination of omeprazole, esomeprazole, pantoprazole, rabeprazole, dexrabeprazole, tenatoprazole, lansoprazole, and dexlansoprazole is discussed.

Computation of Stresses, Strains, and Deformations of Tires

1980 ◽  
Vol 53 (4) ◽  
pp. 849-902 ◽  
Author(s):  
R. A. Ridha
Keyword(s):  
Structural Analysis ◽  
Experimental Studies ◽  
Analytical Techniques ◽  
Complete Characterization ◽  
Analytical Determination ◽  
Analytical Technique ◽  
Long Time ◽  
Structural Responses

Abstract The pneumatic tire is often taken for granted as a simple and reliable component of the vehicle. A closer look, however, shows that the tire in service is subjected to severe stresses and deformations whose quantities must be determined in order to accurately predict tire performance. Modern tire structures have evolved through a series of modifications of the original pneumatic rubber tire. These modifications were based on field experiences and on mostly experimental studies of tire behavior. The use of analytical techniques to calculate tire stresses and deformations remained limited in scope for a long time because the complexity of the tire structure placed it beyond the domain of available methods of analysis. The recent emphasis on analytical techniques is due, at least partly, to their potential for becoming less time consuming and less expensive than experimental methods, the need for predicting a tire's behavior before its manufacture, and the notable advances in computational and structural analysis methods. In this paper, these methods are described and applied to the calculation of tire stresses and deformations. Structural analysis is the analytical determination of structural responses to a prescribed set of applied loads. The responses may be displacements or distortions if force loads are known, or forces if displacement or distortions are known. Given the geometry of a structure (shape, dimensions), the relevant properties of its component materials, the magnitude and distribution of applied loads, and any constraints from boundary conditions, then structural analysis is used to calculate displacements, strains, or stresses at any chosen location in or on the structure. These calculated values may be compared to those required for functionality of the structure. Although structural analysis is not directly applicable to determining the most efficient configuration of the structural components, the analysis of successive well chosen modifications can often optimize compositions or geometries. The application of structural analysis to a tire requires (a) knowledge of the relevant physical properties of the component materials, and their configuration in the tire, (b) complete characterization of the applied loads, and (c) an analytical technique (i.e. theory) for calculating the required responses. These requirements are explained in the following sections.

scholarly journals Current Methods for the Extraction and Analysis of Isothiocyanates and Indoles in Cruciferous Vegetables

Analytica ◽  
2021 ◽  
Vol 2 (4) ◽  
pp. 93-120
Author(s):  
Sofia Karanikolopoulou ◽  
Panagiota-Kyriaki Revelou ◽  
Marinos Xagoraris ◽  
Maroula G. Kokotou ◽  
Violetta Constantinou-Kokotou
Keyword(s):  
High Performance ◽  
Degradation Products ◽  
Analytical Techniques ◽  
Extraction Methods ◽  
Analytical Determination ◽  
Cruciferous Vegetables ◽  
Plant Metabolites ◽  
Secondary Plant Metabolites ◽  
Wide Range

Cruciferous vegetables are characterized by the presence of sulfur-containing secondary plant metabolites known as glucosinolates (GLS). The consumption of cruciferous vegetables such as broccoli, cabbage, rocket salad, and cauliflower has been related to the prevention of non-communicable diseases. Their beneficial effects are attributed to the enzymatic degradation products of GLS, e.g., isothiocyanates and indoles. Owing to these properties, there has been a shift in the last few years towards the research of these compounds and a wide range of methods for their extraction and analytical determination have been developed. The aim of this review is to present the sample preparation and extraction procedures of isothiocyanates and indoles from cruciferous vegetables and the analytical methods for their determination. The majority of the references that have been reviewed are from the last decade. Although efforts towards the application of eco-friendly non-conventional extraction methods have been made, the use of conventional solvent extraction is mainly applied. The major analytical techniques employed for the qualitative and quantitative analysis of isothiocyanates and indoles are high-performance liquid chromatography and gas chromatography coupled with or without mass spectrometry detection. Nevertheless, the analytical determination of isothiocyanates presents several problems due to their instability and the absence of chromophores, making the simultaneous determination of isothiocyanates and indoles a challenging task.

scholarly journals A review on analytical methods for the determination of natural colorants (green) in food commodities and beverages

2020 ◽  
Vol 10 (2) ◽  
pp. 4993-5010
Keyword(s):  
Analytical Methods ◽  
Analytical Techniques ◽  
Food Products ◽  
Extraction Methods ◽  
Green Is ◽  
Regulatory Authorities ◽  
Natural Colorants ◽  
Metal Derivatives ◽  
Food Commodities

A wide variety of natural colorants are generally used for coloring food stuffs to make them more attractive, informative and reinstate the original color lost during the production process. However, in many countries the usage of natural colorants is limited due to their low stability. Green is one of the most important secondary colors as far as consumer goods are concerned due to looking fresh and natural. Chlorophyll and its metal derivatives like copper or zinc chlorophylls have been used as green colorant in food and pharmaceuticals. The regulatory authorities and food analysts have adopted precise analytical methods in assessing quality and safety of food products. These techniques mainly deal with determination of quality, quantity, colorant stability, safety and utility limits of colorants in food stuffs. These aspects are sensitively regulated by regulatory authorities as well as domestic and food suppliers. In this review, we discuss various extraction methods that are executed for extracting the chlorophyll and metallochlorophyllins from complex food commodities and beverages. In addition, different extraction methods used for food commodities have been presented. Exclusively the present manuscript reviews various analytical techniques used for the analysis of Na-Cu-Chlorophyllin (Na-Cu-Chl) employed in food products as food colorant.

scholarly journals A Brief Review of Analytical Methods for the Estimation of Allopurinol in Pharmaceutical Formulation and Biological Matrices

2021 ◽  
Vol 2021 ◽  
pp. 1-12
Author(s):  
Hemraj Sharma ◽  
Hari Prasad Sapkota ◽  
Nim Bahadur Dangi
Keyword(s):  
Capillary Electrophoresis ◽  
Analytical Methods ◽  
Analytical Techniques ◽  
Analytical Investigation ◽  
Review Article ◽  
Hyphenated Techniques ◽  
Biological Matrices ◽  
Near Ir ◽  
Uv Visible

This review article represents the collection and discussion of various analytical methods available in the literature for the determination of allopurinol (ALLP) in pharmaceutical and biological samples consisting of HPLC, UV-visible method, near-IR spectroscopy, spectrofluorometry, capillary electrophoresis, polarography, voltammetry, and hyphenated techniques such as LC-MS, LC-MS/MS, UPLC-MS/MS, and GC-MS. The anticipated review provides details about the comparative utilization of various analytical techniques for the determination of ALLP. The present review article can be effectively explored to conduct future analytical investigation for the estimation of ALLP.

Sign in / Sign up

Export Citation Format

Share Document