摘要:

Mössbauer spectroscopy is applied to a system of a polymeric iron phthalocyanine complex bonded to activated carbon via an imidazol molecule. This is covalently bonded to the carbon. It is concluded that the imidazol nitrogen coordinates1 primairly to iron in a central position of the condensed poly-ring system.

ISSN:0038-7010    

DOI:10.1080/00387018508076912

出版商:Taylor & Francis Group    

年代:1985

数据来源: Taylor

摘要:

The complex of lead (II) with the reagent 3-methyl-1, 2-cyclopentanodione dithiosemicarbazone, 3-Me-CPDT, has been studied. The composition, stability constant, and free energy change of formation of the complex have been determined. A sensitive spectrophotometric method for the determination of lead in aqueous solutions has been developed and applied for a range of concentration of 0–60μg/ml of lead using the complex Pb-3-Me-CPDT. The optimum conditions for maximum sensitivity of analysis such as standing time, pH, and wavelength have been determined. The effect of foreign ions on this method has also been studied.

ISSN:0038-7010    

DOI:10.1080/00387018508076913

出版商:Taylor & Francis Group    

年代:1985

数据来源: Taylor

摘要:

The complex of silver (I) with the reagent 3-methyl-1, 2-cyclopentanodione dithiosemicarbazone, 3-Me-CPDT, has been studied spectrophotometrically. Few properties of the complex such as its composition, stability, and free energy of formation have been determined. A sensitive method of analysis for silver in aqueous solutions has been developed based on the spectrophotometric measurement of the absorption of the Ag-3-Me-CPDT complex. The optimum conditions for applying this method for the determination of Ag(I) have been determined. These conditions include the standing time, pH, wavelength, and the effect of interfering ions.

ISSN:0038-7010    

DOI:10.1080/00387018508076914

出版商:Taylor & Francis Group    

年代:1985

数据来源: Taylor

摘要:

The title compound has been prepared, characterized and its IR and Raman Spectra recorded and interpreted in terms of a halogenbridged dimeric structure.

ISSN:0038-7010    

DOI:10.1080/00387018508076915

出版商:Taylor & Francis Group    

年代:1985

数据来源: Taylor

摘要:

The applicability of the microwave-coupled hollow cathode excitation source to the determination of minor elements in metals and alloys was tested in the case of Cu (0.019 - 0.060%), Fe (0.30 - 0.34%), Mg (1.29 - 5.85%), Mn (0.12 - 0.58%), Ti (0.014 - 0.042%) and Zn (0.012 - 0.040%). The combined discharge permitted the intensity of analyte spectral lines to be increased, whereas a decrease was observed in background level as well as in the intensity of the carrier gas spectrum. Higher signal-to-noise ratios could thus be obtained without sacrificing any of the properties possessed by the hollow cathode discharge.

ISSN:0038-7010    

DOI:10.1080/00387018508076916

出版商:Taylor & Francis Group    

年代:1985

数据来源: Taylor

摘要:

Infrared (IR) photoacoustic1spectra are usually ‘‘source-compensated,'’ i.e., normalized to account for the variation in the intensity of emission of the source at various wavelengths. Such compensation or normalizing is done by comparing the single-beam spectrum of a sample with the emission spectrum of the source measured with a detector or, more commonly, with the single-beam spectrum of a ‘‘reference'’ carbon. The latter is assumed to be a flat black absorber. We showed, however, that this assumption was not generally valid because different carbons gave different spectra, and concluded that it would be better to avoid carbons and to use direct measurements of the exciting source for the compensation of spectra2. These conclusions were supported by the data of Riseman and Eyring.3They examined different carbons and found not only that the spectra differed but that changes in the interferometer scan speed would bring about further differences, and also concluded that no form of carbon was suitable for source normalization. They suggested using a detector whose response function closely matched that of an ideal photoacoustic black body absorber, i.e., in practice, a DTGS (deuterated triglycine sulfate) detector.3

ISSN:0038-7010    

DOI:10.1080/00387018508076917

出版商:Taylor & Francis Group    

年代:1985

数据来源: Taylor

摘要:

The use of manganese microwave excited electrodeless discharge lamps is examined in a commercial atomic absorption instrument with Zeeman background correction. The EDLs are compared to hollow cathode lamps for stability, intensity and linearity of calibration curves in atomic absorption.

ISSN:0038-7010    

DOI:10.1080/00387018508076918

出版商:Taylor & Francis Group    

年代:1985

数据来源: Taylor

摘要:

Major trace elements (K, Ca, Mg, P, Na), minor trace minerals (B, Sr, Mo, Fe, Cu, Ni, Ba, Zn, Mn, Al, Cr, Sn, Rb), and ultra trace metals (Ti, V, Co, Li) in fresh ‘Marsh’ grapefruit peel samples collected during two consecutive seasons (1981–82 and 1982–83) were determined by an automated fast sequential multielement spectrometer using Inductively Coupled Plasma (ICP) as an excitation source for Atomic Emission Spectrometry (AES). Among the major elements K showed a range of 2000–3200 ppm with a significant difference of concentration fluctuations in both seasons. Within the ultra trace metal group, concentrations were found at constant levels for both periods. In the minor trace group, elements such as Sr, Mo, Fe, Cu, Ni, Ba, Al, and Cr showed slight concentration differences during the 1981–82 season when compared to the 1982–83 period.

ISSN:0038-7010    

DOI:10.1080/00387018508076919

出版商:Taylor & Francis Group    

年代:1985

数据来源: Taylor

摘要:

This is a scanned image of the original Editorial Board page(s) for this issue.

ISSN:0038-7010    

DOI:10.1080/00387018508076911

出版商:Taylor & Francis Group    

年代:1985

数据来源: Taylor