Talanta

Our medical research library holds 5 studies published in Talanta (1967–2018). Each entry links to the study's record on PubMed and, where there is one, to the publisher's page and a free full text. 5 have an abstract, the authors' own summary as PubMed records it: open "Abstract" to read it.

About the journal

• Publisher: Elsevier
• Published: 1958 to the present, Netherlands
• Language: mul
• ISSN: 0039-9140 (print), 1873-3573 (electronic)
• Its record in the NLM Catalog

2010s

• Innovative unattended SEM-EDS analysis for asbestos fiber quantification. R. Cossio, C. Albonico, A. Zanella, et al. 2018;190:158-166. PubMed · Publisher

  Abstract

  Scanning electron microscopy with energy dispersive spectrometry (SEM-EDS) is the only affordable analytical technique that can discriminate both morphology and elemental composition of inorganic fibers. SEM-EDS is indeed required to quantify asbestos in confounding natural matrixes (e.g. ophiolites), but is also time-consuming, operator dependent, and strongly relies on the stochastic distribution of the fibers on the filter surface. The balance between analytical time/cost and the method sensibility allows only about 0.5% of the filter to be analyzed, strongly affecting the statistical significance of results. To improve sensitivity and precision and enhance productivity, an unattended quantitative measurement of the asbestos fibers by SEM-EDS is proposed. The method identifies the particle shape first and determines their chemical composition later, saving EDS analytical time. Our approach was tested on four asbestos standards and the relative error on replicated measurements was < 10%. The proposed unattended method quantifies asbestos in natural confounding matrix, also with a very low asbestos content.

  Copyright © 2018 Elsevier B.V. All rights reserved.

1990s

• Highly specific spectrophotometric method for palladium(II) determination with 3-(5'-tetrazolylazo)-2,6-Diaminotoluene in the presence of chlorides. Kinetic and equilibrium study of reactions. O. Hernández, A.I. Jiménez, F. Jiménez, et al. 1994;41(5):775-82. PubMed · Publisher

  Abstract

  3-(5'-tetrazolylazo)-2,6-Diaminotoluene (TEADAT, H(3)L(2+)) forms stable 1:1 and 1:2 (metal:ligand) pink-red complexes (lambda(max) 506 and 536 nm) with palladium(II). The apparent molar absorptivity of 1:2 complex is 5.2 x 10(4) 1.mol(-1). cm(-1) at 536 nm. Equilibrium constants beta*(nl) for reactions PdCl(2-)(4) + nH(3)L(2+) right harpoon over left harpoonright harpoon over left harpoon PdCl(4-n) (H(2)L)(2n-2)(n) + n Cl(-) + n H(+) were determined: logbeta*(1) = 4.09 +/- 0.05, logbeta*(2) = 8.40 +/- 0.02, corresponding stability conditional constants of PdCl(3)(H(2)L) and PdCl(2)(H(2)L)(2+)(2) were log beta(1) = 19.03, log beta(2) = 26.74. The formation of complexes was rather slow but could be speeded up considerably by the catalytic effect of trace amounts of thiocyanate. Constant absorbance values were thus reached in 2-5 min. A rapid, sensitive and highly specific method for the determination of palladium(II) at pH 1.42 in 0.25M NACl has been worked out with a detection limit of 0.54 mug. Interference of precious and common metal ions have been studied and the method has been applied for the determination of palladium in Pd asbestos, oakay alloys and various catalysts and for the determination of palladium in precious metals.

1960s

• Determination of carbon monoxide in metal carbonyl complexes. A.D. Campbell, P.E. Nelson. 1969;16(7):875-9. PubMed · Publisher

  Abstract

  Carbon monoxide is liberated from carbonyl-containing metal complexes by treatment with various reagents such as pyridinium hydrobromide perbromide in dichloromethane, hydrogen peroxide in acetone, or iodine in pyridine, and oxidized to carbon dioxide by the Schütze iodine pentoxide reagent. The carbon dioxide is determined gravimetrically following absorption on soda asbestos.

• Microdetermination of carbon and hydrogen Automatic combustion in a dynamic system. N. Gel'man. 1969;16(3):464-7. PubMed · Publisher

  Abstract

  An automatic combustion method has been developed for organic and organo-metallic compounds (5-10 mg samples), based on "wide tube" dynamic combustion in a turbulent oxygen atmosphere. Hydrocarbons, carboranes, transition metal carboran complexes, highly fluorinated compounds, silanes, siloxanes and cyclosilazanes, fluoroderivatives of alkyl phosphinic acids, high polymers, etc. have been analysed by it. Silver-plated pumice, magnesium oxide, fibrous asbestos and crushed quartz were used to absorb interfering elements. Advantages over the manual procedure are simplicity of procedure, rapid combustion of difficultly combustible or highly volatile compounds, and better reproducibility of the results. The overall combustion cycle takes 15 min. The standard deviation for hydrogen is 0.01-0.15 % and for carbon is 0.10-0.23 % (carbon content 20-95 %).

• Spectrophotometric determination of channel black in small arms propellants. M. Galan, G. Norwitz. 1967;14(5):603-6. PubMed · Publisher

  Abstract

  A spectrophotometric method is proposed for the determination of Channel Black in small arms propellants. The Channel Black is separated from the nitrocellulose and other organic compounds by dissolution of the propellant in morpholine and filtration through a sintered porcelain crucible containing an asbestos mat. The Channel Black is then dissolved by treating the mat and crucible with boiling nitric acid for 3 hr, the solution is filtered, and the yellow colour is measured. The colour is due to polycarboxylic acids with cyclic nuclei. The range of the method is from 0 to 0.5% of Channel Black.

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