Showing papers in "Analytica Chimica Acta in 2011"

TL;DR: This review serves to describe the physical theory of LSPR formation at the surface of nanostructures, and the potential for this optical technology to serve as a basis for the development bioassays and biosensing of high sensitivity.

TL;DR: This review shows that highly enhancing SERS substrates with a high degree of reliability and reproducibility can now be fabricated at relative low cost, indicating that SERS may finally realize its full potential as a very sensitive tool for routine analytical applications.

TL;DR: This work discusses how different studies used Pressurized liquid extraction to enrich phenolic compounds, lignans, carotenoids, oils and lipids, essential oils and other nutraceuticals from foods and herbal plants.

TL;DR: This review deals with recent advances in the development of HILIC phase separation systems with special attention to the properties of stationary phases.

TL;DR: A section highlighting nanomaterials with interesting catalytic properties that can be used in the design of future devices for analytical chemistry is included, including fullerenes, carbon nanotubes, graphene, and composite materials.

TL;DR: This paper compares the performance of 16 different feature selection methods for the prediction of properties of biodiesel fuel, including density, viscosity, methanol content, and water concentration.

TL;DR: This tutorial paper provides a review of the publications related to ambient ionization techniques and describes the underlying principles of operation, ionization processes, detecting mass ranges, sensitivity, and representative applications of these techniques.

TL;DR: The evolution of the regulations and guidelines on the quality control of herbal medicines is considered, and the established analytical techniques for herbal fingerprinting are reviewed with an emphasis on the most recent developments, such as miniaturized techniques, new stationary phases, analysis at high temperatures and multi-dimensional chromatography.

TL;DR: Examples of bioanalytical applications of DNAzymes with peroxidase-like activity include nucleic acid probes with DNAzyme labels for the detection of specific DNA sequences in colorimetric or chemiluminescent assays and tests for telomerase or methyltransferase activity, which are potential targets in anticancer therapy.

TL;DR: This review highlights the application of ionic liquids and PILs as innovative sorbent materials for SPME by gathering available experimental data and exploring the sensitivity, linear calibration range, as well as detection limits for a variety of target analytes in the methods that have been developed.

TL;DR: The SVC model achieved a data reduction of 92.5% for redesigning the future monitoring program and the SVR model provided a tool for the prediction of the water BOD using set of a few measurable variables.

TL;DR: Some of the clinical evidence for the potential application of miRNAs as biomarkers in diagnostics is summarized, providing some general perspectives on the use of mi RNAs in clinical situations, including therapeutic applications.

TL;DR: In this tutorial the main concepts of MEPS will be elucidated, different practical aspects in MEPS are addressed, and a comparison between MEPS and other extraction techniques such as SPE, LLE, SPME and SBSE will be discussed.

TL;DR: The most important and broadly used chiral stationary phases (CSPs) for high performance liquid chromatography (HPLC) are reviewed and emphasis is given to new, emerging CSPs that seem to possess all requisites to be considered potentially successful chiral separation media in the next future.

TL;DR: A comprehensive study of the influence of pre-processing procedures on statistical models and a method based on genetic algorithms (GAs) is introduced, which results in models, which have a higher precision and are more stable against corrupting effects.

TL;DR: G-Fe(3)O(4) magnetic nanoparticles was used as the adsorbent for the magnetic solid-phase extraction of some triazine herbicides in environmental water samples followed by high performance liquid chromatography-diode array detection (HPLC-DAD).

TL;DR: The developments in the technologies behind commercial BGMD, especially those in the areas of chemistries, mediators and other components are reviewed, to review the trends in blood glucose monitoring and future trends are discussed.

TL;DR: The applications of ion mobility spectrometry have grown exponentially beyond its uses for explosive, illicit drug and chemical warfare agent monitoring in recent years, and coupling IMS with MS(n) has enabled the analysis of very complex samples and the extraction of knowledge unavailable from isolated MS measurements.

TL;DR: An automated on-line solid-phase extraction coupled to fast liquid chromatography-tandem mass spectrometry (on-line SPE fast LC-MS/MS) method was developed for the simultaneous analysis of bisphenol A (BPA), bispenol F (BPF), bistonhenol E (BPE), bishenol B (BPB) and bisphensol S (BPS) in canned soft drinks without any previous sample treatment.

TL;DR: An organophosphorus biosensor fabricated using this AChE/Fe(3)O(4)/c-MWCNT/Au electrode as a working electrode, Ag/AgCl as standard and Pt wire as an auxiliary electrode connected through a potentiostat was suitable for trace detection of OP pesticide residues in milk and water.

TL;DR: The recent innovations made in the field are due to the freedom in operational conditions and practicability to exploit chemical principals for optimum extraction and sensitive determination of analytes.

TL;DR: Developments in the analysis of urine encompassing both classical approaches of urinalysis and metabolomics are covered, it must be emphasized that these approaches are not orthogonal - they both have their uses and are complementary.

TL;DR: Methods for assessing aptamer-protein binding using separation based techniques such as dialysis, ultrafiltration, gel and capillary electrophoresis, and HPLC; as well as mixture based techniques, including fluorescence intensity and anisotropy, UV-vis absorption and circular dichroism, surface plasmon resonance, and isothermal titration calorimetry are reviewed.

TL;DR: Fundamental research on non-spectroscopic interferences in inductively coupled plasma (ICP) mass spectrometry with sample introduction using nebulization is critically and exclusively examined in this review.

TL;DR: The analysis of wastewater samples revealed the high selectivity of the synthesized polymer which was able to recognize and retain the target analytes by both extraction methods and the semi-automated MEPS packed with MIP material.

TL;DR: The proposed CdTe QDs-based sensitive and selective probe exhibited a high selectivity for Zn(2+) and Cd(2%) over other metal ions and was successfully used in the detection of Zn (2+) or Cd-2+) in real water samples.

TL;DR: A fast HPLC method with diode-array absorbance detector and fluorescence detector for the analysis of 19 phenolic acids, flavan-3-ols, flavones, flavonols and caffeine in different types of samples revealed excellent reproducibility, resolution, selectivity and peak symmetry.

TL;DR: The recent microfluidic hybridization method shows the advantages of less sample usage and reduced incubation time and the high surface-to-volume ratio in microchannels of nanolitre volume greatly enhanced the sensitivity as obtained with the bulk solution method.

TL;DR: An improved metabolic profile obtained by combining MS and NMR by this approach may be useful to achieve more accurate disease detection and gain more insight regarding disease mechanisms and biology.

TL;DR: Various types of separation techniques are presented, with the express goal of emphasizing time and cost-effective methods that isolate and quantify trace-levels of multiple endocrine disruptors from aqueous systems.