CONTENTS

FULL PAPERS

Analytical Chemistry

Comparison of closed-pressurized and open-refluxed vessel digestion systems for trace elements in the residual fuel oil reference material (SRM 1634c)

T. Wondimu and W. Goessler 

99

Abstract

Selective removal of chromium from sulphuric acid leach liquor of ilmenite ore by solvent extraction with trioctylamine

E.O. Olanipekun 

115

Abstract

Inorganic Chemistry

N-Phosphyl derivatives of 2-t-butyl-1,3,2-diazaboracycloalkane ring system

Negussie Retta and Robert H. Neilson 

123 

Abstract

Synthesis and characterization of monomeric and dimeric manganese(II) and zinc(II) complexes of pyridine-2-carbaldoxime