摘要:

The paper deals with the results of studies concerning the effect of acid treatment, with l-4N HCl solutions, on natural zeolitic tuff from Mǐrid deposite (Romania) and on their structure and adsorption properties. The effect of thermal treatment on clinoptilolite acid resistance is also studied.

ISSN:0003-2719    

DOI:10.1080/00032718808066356

出版商:Taylor & Francis Group    

年代:1988

数据来源: Taylor

摘要:

This work characterizes a newly developed, sensitive and convenient spectrophotometric procedure for determination of sub-ppm concentrations of hydrazine and its organic derivatives. The method is based on formation of the cuprous neocuproine chelate after reaction of hydrazines with a prepared aqueous solution of the copper (II)-neocuproine complex. The cuprous chelate is then directly measured in aqueous solution at 458 nm. The effect of several experimental conditions influencing the reaction are presented and the method was employed for the analyis of 5 different hydrazine compounds. The standard deviation did not exceed ± 0.47%.

ISSN:0003-2719    

DOI:10.1080/00032718808066357

出版商:Taylor & Francis Group    

年代:1988

数据来源: Taylor

摘要:

High molecular weight amines have been used for the extraction of citrate complexes of Ce(III), Gd(III) and Yb(III). The effect of different variables on extraction has been studied. The citrate species extracted in the organic phase have been proposed as [(RNH3+)3] [M(Cit)2]3-.

ISSN:0003-2719    

DOI:10.1080/00032718808066358

出版商:Taylor & Francis Group    

年代:1988

数据来源: Taylor

摘要:

Fifteen new hydroxamic acids were explored in conjunction with trioctyimethylammonium cation for the extractive separation of manganese into MIBK from the anions and cations commonly associated with the metal in environmental samples. The most rapid extraction with the maximum selectivity and sensitivity for the atomic absorption spectrometric determination of the metal in the MIBK extract was achieved with N-p-aminophenyl-2-furylacrylohydroxamic acid. The method enabled the determination of manganese at sub-ppb levels and was applied in the analysis of coal, manganese ore, plant tissue, animal tissue and natural waters.

ISSN:0003-2719    

DOI:10.1080/00032718808066359

出版商:Taylor & Francis Group    

年代:1988

数据来源: Taylor

ISSN:0003-2719    

DOI:10.1080/00032718808066360

出版商:Taylor & Francis Group    

年代:1988

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:10.1080/00032718808066345

出版商:Taylor & Francis Group    

年代:1988

数据来源: Taylor