摘要:

It is first necessary to attempt to state what defines an “Irish Analytical Chemist” and secondly for the reasons of space, select for discussion from the many, so defined.1,2

ISSN:0003-2719    

DOI:10.1080/00032717908055684

出版商:Taylor & Francis Group    

年代:1979

数据来源: Taylor

摘要:

A combined chemical information system based on three different spectrometries, i. e. IR, MS and CNMR adapted for the minicomputer PDP 11/34 is described. The data base of the system consists of 1000 compounds each one being completely defined by the two dimensional structure image, WLN, chemical name, molecular formula and all three types of spectra (IR, MS and CNMR). The data file organization and system philosophy are described and discussed.

ISSN:0003-2719    

DOI:10.1080/00032717908055685

出版商:Taylor & Francis Group    

年代:1979

数据来源: Taylor

摘要:

The influence of the ethanol in ethanol-aqueous mixtures on the formation of Cu(II) -EDTA and Fe(III) -EDTA complexes was investigated. A solid membrane cupric ion-selective electrode as the titration sensor was used for direct determination of copper(II) in the presence of different quantity of iron(III) in non-aqueous media. The direct determination of copper(II) ion is based on the formation of Cu(II) -EDTA complex, which is quantified by measurements with a cupric electrode. The measurements were carried out in 45% v/v ethanol.

ISSN:0003-2719    

DOI:10.1080/00032717908055686

出版商:Taylor & Francis Group    

年代:1979

数据来源: Taylor

摘要:

Total chlorine residuals of wastewater effluents as determined by an Orion 97–70 residual chlorine electrode and the phenylarsine oxide (PAO) back-titration were compared. At ≤1 ppm levels, the electrode and titrimetric methods compared favorably, but at>l ppm chlorine concentration the electrode was preferred. Use of the electrode for measuring chlorine residuals was limited to samples with a biochemical oxygen demand ≥50 mg/1 oxygen, while the PAO back-titration could be employed above this limit. The electrode was useful for field analysis; however, the electrode reading was strongly dependent upon temperature. An empirical graph was developed which allowed a post-analysis correction for the temperature differential between samples and standards.

ISSN:0003-2719    

DOI:10.1080/00032717908055687

出版商:Taylor & Francis Group    

年代:1979

数据来源: Taylor

摘要:

A TLC/HPLC procedure for the determination of polycyclic aromatic hydrocarbons (PAH), occuring in asphalt fumes (adsorbed on particular matter), is described. The method is based on extraction of asphalt fume particles, collected on glass fibre filters, using CCK4. Following a clean up step by the aid of a TLC procedure on Al2O3thinlayer plates, using a mixture of cyclohexane/acetone/ether as the mobile phase. Under UV-light, occuring PAH are indicated as fluorescent spots. A separation of the collected PAH into individual components and their identification is performed by the aid of a HPLC procedure. Futher-more, an approach was made to verify the separated PAH by their fluorescence spectra and their mass spectra.

ISSN:0003-2719    

DOI:10.1080/00032717908055688

出版商:Taylor & Francis Group    

年代:1979

数据来源: Taylor

摘要:

Sulfate emission measurements were conducted on a hog-fired boiler. The boiler utilized both hogged bark and No. 6 residual fuel oil in various usage ratios. Sampling was conducted both at the boiler outlet and at the particulate control device outlet using a total sulfate sampling train. The sulfate emissions were proportional to the combustion of the residual fuel and were not influenced by the presence of hogged fuel. The work also indicated that sulfates are partially controlled by the condensation of sulfuric acid prior to the particulate control device.

ISSN:0003-2719    

DOI:10.1080/00032717908055689

出版商:Taylor & Francis Group    

年代:1979

数据来源: Taylor

摘要:

A scheme for some representative separations of metal ions Ag(l), Tl(I), Cu(II), Cd(II), Hg(II), Be(II), Zn(II), Pb(II), Mn(II), Fe(II), Co(II), Ni(II), Al(III), As(III), Sb(III), Cr(III), Th(IV), Zr(IV). Sn(IV), Ti(IV), V(V), U(V), Mo(VI) and Se(VI) of ternary, quaternary, pentnary and hexanary type on NTA (Nitrilo triacetic acid) imnreg-nated plates using 5 % aq. ammonia, ethanol, acetone and acetic acid of different compositions as developing systems and 0.5 % dithizone (in chloroform) for visualisation, is reported.

ISSN:0003-2719    

DOI:10.1080/00032717908055690

出版商:Taylor & Francis Group    

年代:1979

数据来源: Taylor

摘要:

An electrochemical HPLC-detector based on the Hg-drop principle is described. The new features of this detectro comprise a horizontally placed Hg-capillary and a pin moveable against the capillary opening to reduce the dropping time. The performance and price compare favourably with U. V. -dectors. While of lower sensitivity than a solid electrode detector it is advantageous with regard to simplicity of handling and absence of surface poisoning problems.

ISSN:0003-2719    

DOI:10.1080/00032717908055691

出版商:Taylor & Francis Group    

年代:1979

数据来源: Taylor

摘要:

Surface deactivation in the preparation of glass capillary columns was studied using different acid leaching procedures. Surface analysis by Auger electron spectroscopy both before and after heat treatment of these capillaries provided information on the extent of leaching associated 1 Present address, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37830 with each procedure. Results suggest that Pyrex glass which has been leached with 19% HC1 solution at 100°C is essentially pure SiO2except for a significant amount of surface carbon contamination. Furthermore, heat treatment of soda-lime glass with gaseous HC1 followed by formic acid leaching achieves nearly complete deactivation. Chromatographic results verify these observations.

ISSN:0003-2719    

DOI:10.1080/00032717908055692

出版商:Taylor & Francis Group    

年代:1979

数据来源: Taylor

摘要:

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

ISSN:0003-2719    

DOI:10.1080/00032717908055683

出版商:Taylor & Francis Group    

年代:1979

数据来源: Taylor