Showing papers in "Analytica Chimica Acta in 1961"

TL;DR: In this paper, the chelate formed between lanthanum and alizarin complexone has been used as the basis for a method for the determination of fluoride in natural waters, with special reference to sea water.

TL;DR: In this article, the major factors that control the silicomolybdate reaction are the polymer species and acidity of the reaction, which is controlled largely by the pH of the stock solution, the concentration of molybddate, and the ratio of acid to molyddate in reaction; and the type of acid used in the reaction.

TL;DR: The saturated calomel electrode is the reference electrode in aqueous polarographic studies as mentioned in this paper, however, it is not the case in nonaqueous polarogasnographic studies.

TL;DR: PAN(1-(2-pyridylazo)-2-naphthol) was proposed for the solvent extraction and spectrophotometric determination of manganese, iron, cadmium, mercury, gallium, and yttrium.

TL;DR: In this article, 19 reactifs ou colorants differents ont ainsi ete essayes, and 6 seulement se sont montres utilisables.

TL;DR: A method for calculating the end point and the ionization constant in a potentiometric titration was developed in this article, which was compared with the procedure of KOLTHOFF and that of HAHN.

TL;DR: A sensitive spectrophotometric method has been developed for deternination of pallaudium, busing 5(p -dimethylaminobenxylidene) rhodanine reagent in formic, hydrochloric, or propionic acid solution as mentioned in this paper.

TL;DR: In this article, a rapid and simple method for estimating starch in wood is described, which is suitable for carrying out large numbers of determinations and can be used to carry out large-scale determinations.

TL;DR: In this paper, the abundances of rare earths were determined in chondritic, achondritic and iron meteorites by neutron activation analysis, after exposure to a thermal-neutron flux of 2.1012 neutrons/cm2/sec for 2 h.

TL;DR: In this article, a procedure for the direct determination of lead in gasoline by atomic absorption spectroscopy was developed, which does not require expensive equipment, is remarkably free from interference by other trace elements present, and allows considerable variation in the sulfur and nitrogen content of the gasoline.

TL;DR: In this article, the principle of atomic absorption spectrophotometry has been exploited as an analytical technique and details are given of the development of a procedure for determining lead in copper-base alloys and leaded steels.

TL;DR: In this paper, the kinetics of the decomposition of yttrium, cerous and zirconyl oxalates have been studied thermogravimetrically and also by differential thermal analysis.

TL;DR: An exhaustive study of linear diffusion techniques has been carried out at B4C electrodes for both practical and theoretical investigations, some novel interrelationships between modern electrochemical techniques have been developed, and the validity of the R andles-S evcik equation has been established for slow scan rates as discussed by the authors.

TL;DR: N-Benzoylphenylhydroxylamine has been employed in the gravimetric determination of beryllium and in its separation from iron, aluminium and titanium.

TL;DR: In this article, the pattern of uranium extraction from nitric acid media was investigated, and the extraction was affected by the nature of the organic substituents attached to the phosphoryl group as well as by the solvent structure.

TL;DR: In this article, the negatively charged chloride complex of uranium is adsorbed on the strongly basic anion exchanger Dowex 1 X8 (chloride form) from a solution containing 80% methanol and 20% 6 N hydrochloric acid.

TL;DR: In this article, the authors used a flame photometric determination of sodium and potassium in plant ash extracts with particular reference to interferences; the instrument used was a Beckman spectrophotometer model DU, with a flame attachment of the total consumption burner type.

TL;DR: In this paper, gas-liquid chromatography coupled with infrared and ultraviolet spectrophotometry was used to analyze aromatic hydrocarbons boiling between 202° and 280° in the neutral oil portion of a low-temparature coal tar.

TL;DR: In this paper, N-Benzoylphenylphenylhydroxylamine is employed as a precipitant for the determination of molybdenum (VI) trioxide after ignition.

TL;DR: In this paper, the amines studied are absorbed in excess of the exchange capacity by sulfonated polystyrene resins from aqueous solutions; the absorption is greatest with benzylamine, whose molecular structure is the closest to that of the monomer of the resin.

TL;DR: In this article, a new catalytic oxidation procedure involving the use of a cerium(IV) sulfate reagent in perchloric acid with a mixed silver(I)-manganese(II) perchlorate catalyst was developed for the determination of phosphite, hypophosphite, and tellurium.

TL;DR: In this paper, the isotopes radioactifs de mercure, platine, iridium, osmium, rhenium, and rhenia are discussed.

TL;DR: In this article, selective elution with acetone-hydrochloric acid mixtures is used to concentrate the constituents of biological ashes and to separate them into the groups: MoO4-2, SO4 -2, PO4-3, Fe+3, Zn+2, Pb+2.

TL;DR: In this paper, the titration of cysteine (RSH), glutathione (GSH), thioglycolic acid (TSH), and 2-mercaptoethanol (ESH) at the RMPE at pH 9 yields a sharply defined end-point corresponding to the composition (XS)2Hg.