摘要:

AbstractA method is presented for the direct determination of iron in the HCl soluble fraction of carbonate rocks. Use is made of the absorbance‐difference technique as developed by Glasner and Avinur, whereby the chloroferrate absorbance of the solution is measured at two wavelengths and the difference of absorbance between them is made the basis of the determination. Determination of iron by the chloroferrate absorbance when measured at only one wavelength was found to be impeded by the variation of the absorbance with the following factors: the ratio of chloride salt to free HCl; the nature of the chloride salt (Ca or Mg); slight changes in the total chloride concentration; and temperature. All these difficulties were largely overcome by the application of the absorbance‐difference techni

ISSN:0021-2148    

DOI:10.1002/ijch.196600021

出版商:WILEY‐VCH Verlag    

年代:1966

数据来源: WILEY

摘要:

AbstractThe U. V. spectra of the chloro‐complexes of copper (I) and lead (II) were studied in various concentrations of calcium and magnesium chloride. Algebraic formulae were developed for the simultaneous and direct determination of trace amounts of copper and lead in the HCl soluble fraction of carbonate rocks. Interference due to background absorbance was reduced by the use of these formula

ISSN:0021-2148    

DOI:10.1002/ijch.196600022

出版商:WILEY‐VCH Verlag    

年代:1966

数据来源: WILEY

摘要:

AbstractThe synthesis of 1,2,2‐trimethylazacyclodecane is describe

ISSN:0021-2148    

DOI:10.1002/ijch.196600023

出版商:WILEY‐VCH Verlag    

年代:1966

数据来源: WILEY

摘要:

AbstractFragmentation ofN‐substituted morphinans under electron impact has been studied. Substitution affects the fragmentation pattern and the distribution of the charge in the fragments obtained by cleavage of doubly charged molecular ion

ISSN:0021-2148    

DOI:10.1002/ijch.196600024

出版商:WILEY‐VCH Verlag    

年代:1966

数据来源: WILEY

摘要:

Abstract6‐Trifluoromethylindole was prepared by reductive cyclization of 2‐nitro‐4‐trifluoromethylbenzyl cyanide. The indole was converted into the corresponding 3‐aldehyde and 3‐carb

ISSN:0021-2148    

DOI:10.1002/ijch.196600025

出版商:WILEY‐VCH Verlag    

年代:1966

数据来源: WILEY

ISSN:0021-2148    

DOI:10.1002/ijch.196600026

出版商:WILEY‐VCH Verlag    

年代:1966

数据来源: WILEY

ISSN:0021-2148    

DOI:10.1002/ijch.196600027

出版商:WILEY‐VCH Verlag    

年代:1966

数据来源: WILEY

ISSN:0021-2148    

DOI:10.1002/ijch.196600020

出版商:WILEY‐VCH Verlag    

年代:1966

数据来源: WILEY