scispace - formally typeset
Search or ask a question

Showing papers in "Analytica Chimica Acta in 1998"


Journal ArticleDOI
TL;DR: An overview of the evolution of Soxhlet extraction of solid materials and its comparison with the performance of other conventional and new extraction techniques is presented in this article, where a discussion on both conventional SoxHlet as compared with other conventional extraction techniques and some minor improvements of the former for specific applications is done.

606 citations


Journal ArticleDOI
TL;DR: In this paper, diffusive gradients in thin-films (DGT) has been used for the in situ measurement of reactive phosphorus species in natural waters, sediments and potentially soils.

342 citations


Journal ArticleDOI
TL;DR: In this article, the pseudototal metal content of the trail pit was determined following a microwave-assisted digestion with aqua regia, which was performed using the BCR three-step sequential extraction procedure.

323 citations


Journal ArticleDOI
TL;DR: The knowledge and the fundamentals of Immunoassay methods are given in order to make good use of immunoassays, especially of ELISA tests, and quality assurance and guidelines for validation and use are given.

239 citations


Journal ArticleDOI
TL;DR: In this paper, a pH sensitive fluorescent sol-gels were obtained by both covalent immobilization of aminofluorescein (AF) via isocyanate or epoxy groups, and by co-condensation of tetramethoxysilane (TMOS) and phenyltrimethyltranslated threedextrin (Ph-TriMOS) in the presence of AF.

224 citations


Journal ArticleDOI
TL;DR: In this article, Wu and Boyle used low-blank Mg(OH) 2 coprecipitation to preconcentrate Fe from seawater, and used isotope dilution high-resolution ICPMS detection to ensure accuracy and enable high sensitivity.

217 citations


Journal ArticleDOI
TL;DR: A comprehensive and critical compendium of the pKa values in methanol of phenol derivatives, carboxylic acids, both aliphatic and aromatic acid derivatives, protonated amines and nitrogen-protonated heterocyclic bases is given in this paper.

214 citations


Journal ArticleDOI
TL;DR: A method using ultrasonication extraction and solid phase extraction (SPE) clean-up for determination of US EPA 16 priority pollutant polycyclic aromatic hydrocarbons (PAHs) in soils by reversed-phase liquid chromatography (RP-LC) with ultraviolet (UV) absorption detection was studied as mentioned in this paper.

206 citations


Journal ArticleDOI
TL;DR: A use of the intrinsic DNA electrochemical response for monitoring hybridization events offers several advantages, including the appearance of a new peak, a flat background, or simplicity.

195 citations


Journal ArticleDOI
TL;DR: In this paper, an accelerated solvent extraction (ASE) system and a modified Folch procedure were compared in their ability to extract lipids from cereal, egg yolk and chicken breast muscle samples.

178 citations


Journal ArticleDOI
TL;DR: In this article, the authors developed a highly sensitive system for shipboard determination of dissolved iron at the sub-nM level, based on a flow injection method coupled with luminol chemiluminescence detection.

Journal ArticleDOI
TL;DR: In this article, principal component analysis and discriminant analysis were applied to gas chromatographic data for fatty acids composition of commercial edible vegetable oils including sesame, perilla, soybean, corn germ, canola, rapeseed, olive and coconut oils.

Journal ArticleDOI
TL;DR: In this paper, two sequential extraction procedures (a 3-step protocol proposed by the Standards, Measurements and Testing programme (SMT this CRM has been recently certified for the content of Cd, Cr, Cu, Ni, Pb and Zn in the three fractions resulting by applying the SM&T three-step procedure.

Journal ArticleDOI
TL;DR: In this paper, a small prototype instrument that employs an array of four polymer-coated surface acoustic wave (SAW) sensors and a thermally desorbable adsorbent preconcentrator for rapid breath analysis is described.

Journal ArticleDOI
TL;DR: In this paper, a near-infrared calibration model for the measurement of total protein, albumin protein, globulin protein, triglycerides, cholesterol, urea, glucose, and lactate is described.

Journal ArticleDOI
TL;DR: The biogeochemistry of iron was investigated in remote waters of the Antarctic ocean in the austral summer of 1995/1996 as mentioned in this paper, where a sensitive flow injection analyser, based on in-line preconcentration and luminol chemiluminescence detection (FIA-CL), was used for underway surface measurements and vertical profiling during a fine scale survey in the Polar Front (PF) in the Atlantic sector of the Southern Ocean.

Journal ArticleDOI
TL;DR: In this paper, the authors used stable oxo-peroxo-pyridine-2,6-dicarboxylatovanadate(V) complex (OPDV) in acid media to detect hydrogen peroxide in rainwater.

Journal ArticleDOI
TL;DR: In this paper, the excitation-emission fluorescence spectra (EEM) of mixtures of 10 polycyclic aromatic hydrocarbons (PAHs) have been analyzed using different multivariate calibration procedures (partial least squares regression, PLSR; and parallel factor analysis, PARAFAC).

Journal ArticleDOI
TL;DR: In this paper, a method is described which is based on the use of a magnetic sector field inductively coupled plasma-mass spectrometry (ICP-MS) for the determination of Pd, Pt and Rh at ng l −1 levels in urine preliminarily digested by UV irradiation.

Journal ArticleDOI
TL;DR: In this paper, the sedative properties of linalool were examined using the optically active linalools, (R)-(−)-, (S)-(+)- and (RS)-(±)-forms.

Journal ArticleDOI
TL;DR: In this article, a novel technique has been developed for the determination of benzophenone-3 and its metabolites in urine using solid-phase microextraction (SPME) combined with gas chromatography-quadrupole ion trap mass spectrometry (GC-MS).

Journal ArticleDOI
TL;DR: An amperometric enzyme electrode for phenolic compounds was developed via an easy and effective immobilization method using the sol–gel technique and retained ca.

Journal ArticleDOI
TL;DR: In this article, the first report of the determination of nucleic acids based on their template roles for long range assembly of organic dyes was presented, where a Scatchard plot has been constructed at first with the data obtained by using the resonance light scattering (RLS) technique.

Journal ArticleDOI
TL;DR: In this article, a three-stage sequential extraction procedure has been applied for speciation of copper, chromium, nickel, lead and zinc in a sludge sample collected from an urban wastewater treatment plant.

Journal ArticleDOI
TL;DR: In this article, a borate fusion of U and Pu was used for soil, sediments and other materials to determine the presence of actinide elements (Th, Am, etc.) in soil.

Journal ArticleDOI
TL;DR: In this article, a new spectrophotometric method was developed for the simultaneous analysis of a ternary mixture, without prior separation, which is based on the use of the derivative of the ratio spectrum obtained by dividing the absorption spectrum of the mixture by a standard spectrum of a mixture of two of the three compounds in the title mixture.

Journal ArticleDOI
TL;DR: An overview of the state-of-the-art of capillary electrophoresis (CE) for metal speciation analysis is presented in this paper, where various CE separation approaches and detection modes applied are discussed.

Journal ArticleDOI
TL;DR: In this paper, a solgel biosensor based on the chemiluminescence reaction of the hydrogen peroxide−luminol−Horseradish peroxidase (HRP) system was developed.

Journal ArticleDOI
TL;DR: An overview of the forms of phosphorus species likely to be encountered in natural waters and the implications for the measurement of filterable and total phosphorus is given in this paper, where procedures reported in the literature for the storage and digestion of water samples for filterable reactive phosphorus (FRP), total filterable phosphorus (TFP) and overall phosphorus (TP) measurements are summarised and the advantages and limitations of methods discussed.

Journal ArticleDOI
TL;DR: A nonlinear method for fitting acid-base potentiometric titration data was applied to commercial and vermicompost humic acids in order to determine the concentration and conditional p K a's of the ionizable sites.