Showing papers in "Analytica Chimica Acta in 1989"

TL;DR: In this article, a two-phase model for the interpretation of Proton and Metal Ion Interaction with Charged Polyelectrolyte Gels and Their Linear Analogs is presented.

TL;DR: In this article, the steady-state voltammogram of an inlaid disc microelectrode of area A, where A is the diffusion coefficient of the reactant.

TL;DR: A glucose microsensor based on quinoprotein glucose dehydrogenase (GDH) and electron mediators is described, which is unaffected by the concentration of dissolved oxygen and has insensitivity to oxygen.

TL;DR: In this paper, the authors reviewed the theory and practice of using hair as a biopsy tissue for trace elements and discussed the pros and cons of this methodology and examined the past and present use of hair trace-element levels as indicators of nutritional status, disease, heavy-metal poisoning and environmental exposure.

TL;DR: The general principles underlying multi-analyte “ microspot” immunoassay methodology, which relies on the measurement of the ratio of fluorescent signals from individual antibody “microspots” forming a microspot array on a suitable plastic surface, are outlined.

TL;DR: Cleanup methods individual pesticide residue analytical methods multiple pesticide residues analytical methods for water multiple pesticides analytical methods using the AMD technique as discussed by the authors, which is a technique used in many of the above methods.

TL;DR: In this article, a chelate is formed in the flow stream, sorbed on C-18 bonded silica and then eluted for transfer to the atomic absorption spectrometer.

TL;DR: In this paper, a method for the determination of ten rare earth elements (La, Ce, Nd, Sm, Eu, Gd, Dy, Er, Yb, Lu) in natural waters by isotope-dilution mass spectrometry is described.

TL;DR: In this paper, the intrinsic green fluorescence of glucose oxidase (GOD) was used to provide the analytical information for a new type of glucose biosensor, which is compatible with glass and plastic fibres.

TL;DR: In this paper, the tetraalkylammonium sulfonates of functionalized sulfonic acids N, N-bis(2-hydroxy- ethyl)-2-2-aminoethanesulfonic acid, 2-(cyclohexylamino)ethane sulfonic acid and 2-hydrox-4-morpholinopropane-morpholine-morpholopropanes-sulphonic acid were synthesized and their solvent properties were characterized by physical, spectroscopic and chromatographic methods.

TL;DR: In this article, a stable isotope-dilution method using resonance ionization mass spectrometry is used for the determination of rhenium and osmium abundances and isotopic composition in carbonaceous chondrites and iron meteorites.

TL;DR: In this paper, an atomospheric sampling glow-discharge ionization source has been interfaced with an ion-trap mass spectrometer, and the efficiency of ion injection is 1-5%.

TL;DR: A broad view of the role of kinetics in analytical chemistry is presented in this paper, where a classification of measurement and data-processing approaches that have been developed can be found here.

TL;DR: In this paper, a procedure for determining Se(IV) and total dissolved Se in sea water using cathodic stripping voltammetry in the presence of added copper was presented, where the prior step consists in adsorption of a Cu(I)2Se complex species on the hanging mercury drop electrode.

TL;DR: In this article, Nitrate-selective microelectrodes (1-μm tip diameter) with a liquid membrane ion exchanger were prepared, and the response of the electrode is linear from 10 −1 to 10 −5 M nitrate and the time is 30 s.

TL;DR: An online column preconcentration technique for flow-injection atomic absorption spectrometry was developed in this paper, where diverse metal ions (Cd2+, Zn2+, Cu2+, Mn2+, Pb2+, Fe3+ and Cr3+) in solution were concentrated quantitatively by a microcolumn (7-mm × 4-mm id) packed with Muromac A-1, which is an iminodiacetate chelate resin, in a flowinjection system from the pH dependence of the uptake of the ions, all the divalent

TL;DR: The most sensitive spectrophotometric procedure for the determination of ammonium is based on the conversion from ammonium into the intense blue indophenol complex (IPC) by means of salicylate and nitroprusside as discussed by the authors.

TL;DR: In this article, a voltammetric method is proposed to determine folic acid in sea and estuarine waters based on cathodic stripping voltammetry (CSV) preceded by adsorptive collection on a hanging mercury drop electrode.

TL;DR: In this paper, an HCl/HNO 3 /HF PTFE bomb dissolution technique using microwave heating was tested on several environmental and biological materials, and nearly 25 elements in the dissolved samples were determined mainly by inductively coupled plasma.

TL;DR: In this article, the authors present a separation mechanism for size exclusion in aqueous separable separable separation process (SEC) and apply it to biopolymer assemblies, and show that it can be applied to a wide range of applications.

TL;DR: In this paper, the authors describe the evolution of modem ion chromatography and the application of ion-chromophoric compounds in the characterization of some Biological Calcium Phosphates.

TL;DR: In this article, methylmercury was preconcentrated from water on to a sulph-hydryl cotton fibre adsorbent, using the column technique or the batch-column two-stage technique.

TL;DR: In this article, a voltammetric method is reported for the determination of low uranium concentrations in natural waters using a very strongly adsorbed mixed complex of uranyl ion with 2-thenoyltrifluoroacetone and tri-n-butyl phosphate.

TL;DR: In this article, a column packed with macroporous polystyrene-divinylbenzene resin after complexation with quinolin-8-ol was used for the determination of chromium(III) and chromium-VI in sea water by graphite furnace AAS.

TL;DR: The field of plasma source/mass spectrometry is critically reviewed and its current status assessed in this paper, where an overview of PS/MS applications is provided and a discussion is offered of key problem areas that currently exist in the field.