摘要:

This study describes the determination of Cd, Cr, Cu, Ni and Zn in a sample of city waste incinerator ash distributed in 1983 by the European Community Bureau for Reference Materials (sample BCR No. 176) for certification. The sample treatment and the analysis procedure are discussed. The results obtained are evaluated and compared with the values which were later certified.

ISSN:0003-2719    

DOI:10.1080/00032718508082577

出版商:Taylor & Francis Group    

年代:1985

数据来源: Taylor

摘要:

The quantitative determination of glutaraldehyde, formaldehyde and acrolein in air samples, taken at hospitals, engine shops and at one garage is described. Known volumes of air were drawn through sampling tubes, containing Amberlite XAD-2, coated with 2.4-dinitrophenylhydrazine as adsorption material. The hydrazones formed were desorbed using acetonitrile as eluent. The separation of these compounds was performed on a RP C-18 column; for detection at λ = 365 ran an UV spectrofotometer was used.

ISSN:0003-2719    

DOI:10.1080/00032718508082578

出版商:Taylor & Francis Group    

年代:1985

数据来源: Taylor

摘要:

A method was developed for determining lewisite vapor in air. The method entails the collection of lewisite in an impinger or solid-sorbent sampler, conversion of the trapped lewisite to arsenite ion, oxidation of arsenite to arsenate, and determination of the arsenate ion by molybdenum-blue spectrophotometry. Relative to other available techniques, the one described here requires a minimum of instrumentation and can be executed without the use of highly toxic lewisite solutions for instrument calibration.

ISSN:0003-2719    

DOI:10.1080/00032718508082579

出版商:Taylor & Francis Group    

年代:1985

数据来源: Taylor

摘要:

The vigorous evolution of oxygen from the surface of Cu(II) catalyzed 3-substituted-2,5-poly(thienylene) on exposure to solutions of strongly oxidizing metal cations, M+n, and the degradation of the polymer matrix has been observed and investigated. In all cases, a simultaneous degradation of the electronic conductivity and its physical stability were observed. The general mechanism of this redox reaction of M+nwith the polymer material and the redox potentials involved have been elucidated.

ISSN:0003-2719    

DOI:10.1080/00032718508082580

出版商:Taylor & Francis Group    

年代:1985

数据来源: Taylor

摘要:

High performance reverse-phase liquid chromatography with UV-detection can be used to determine trace levels of Pd and Co as their dithiocarbamate complexes by direct injection of aqueous acetonitrile solutions of the metal containing dithiocarbamate. An excess of ligand, at least four times that required to form the neutral metal complex, was necessary for complete metal-complex formation. The presence of other metal species and the solution acidity depleted the amount of ligand available for complexation. Detection limits for Pd(II) and Co(III) from aqueous solution as their dithiocarbamate complexes were 2.7 ng/mL and 9.5 ng/mL respectively. Trace levels of Pd in Platinum powder (62 ug/g)have been determined. A solution of cobalt platonic chloride was analyzed for cobalt content.

ISSN:0003-2719    

DOI:10.1080/00032718508082581

出版商:Taylor & Francis Group    

年代:1985

数据来源: Taylor

摘要:

31P NMR was employed to examine the solution interactions of lithium and potassium ions with sodium phytate. The phytate molecular conformation was found to be pH and concentration dependent. The conformational equilibria of sodium phytate in aqueous solution was not affected by the addition of potassium ions, however, it was influenced by added lithium ions and was dependent on lithium ion concentration. Furthesmore, the phytate molecule showed some selectivity for lithium ion association over potassium and sodium ions. Possible implications in the physiological effects of lithium are discussed.

ISSN:0003-2719    

DOI:10.1080/00032718508082582

出版商:Taylor & Francis Group    

年代:1985

数据来源: Taylor

摘要:

A new spectrophotometric method for vanadium determination is proposed. The method is based on the extraction in Adogen-toluene solution of the complex formed between V(V) and o-Aminobenzohydraxámic acid

ISSN:0003-2719    

DOI:10.1080/00032718508082583

出版商:Taylor & Francis Group    

年代:1985

数据来源: Taylor

摘要:

A sensitive method for the simultaneous determination of osmium(VIII) and Palladium(II) (up to 15 μ9/ml of Os and 11 μ9/ml of Pd) in mixtures, by first and second derivative spectrophotometry, using allyl thiourea as reagent, is described.

ISSN:0003-2719    

DOI:10.1080/00032718508082584

出版商:Taylor & Francis Group    

年代:1985

数据来源: Taylor

摘要:

The use of dicyclohexyl-18-crown-6 methyl isobutyl ketone solution in extraction and flamelessatomic absorption spectrophotometry (AAS) determination of germanium in lignite fly ashes have been studied.

ISSN:0003-2719    

DOI:10.1080/00032718508082585

出版商:Taylor & Francis Group    

年代:1985

数据来源: Taylor

摘要:

This paper describes the determination of Co in two samples of high purity Ni by means of ion-exchange in combination with Inductively Coupled Plasma-Atomic Emission Spectrometry (ICP-AES) and by means of Graphite Furnace - Atomic Absorption Spectrometry (GF-AAS). These samples were both Nickel metal of 99.75%. nominal purity of which one was in the form of a 0.1 mm thick foil and the other a 0.5 mm diameter wire. The Co content in these; samples was determined in the process of a certification campaign and these samples are intended to serve as reference material for Reactor Neutron Dosimetry. The sample treatment and the detection of Co both via ICP-AES and GF-AAS are discussed. The values obtained for both Nickel samples are in accordance with the later certified value.

ISSN:0003-2719    

DOI:10.1080/00032718508082586

出版商:Taylor & Francis Group    

年代:1985

数据来源: Taylor