“…184 limestone specimens were analysed for calcium, magnesium and insoluble residue using basically the method of Archer, Fli nt and Jordan (1958), an undated manual by E. Merck,and Bisque (196 1), but incorporating modifications after Morris (1961) and Lewis, Nardozzi and Melnick (1961). The detailed procedure is fully described in Hutchison (1966).…”
A large and representative collection of specimens from each of the Malayan limestone formations was analysed chemically, mineralogically and petrographically in an attempt to find a criterion for differentiation independent of palaeontology. Limited success has been obtained only where the limestones are sufficiently far removed from granitic intrusions-in Perlis and Kedah, where significant lithological differences occur between limestones of different formations. Unfortunately the results cannot be extended to other areas and no generally applicable criterion for differentiation has been found. Extensive studies of the thermoluminescence of limestones show that all collected specimens have been recrystallised during the revolutionary phase of the Thai-Malayan orogeny so that thermoluminescence cannot be used in Malaya to differentiate limestones stratigraphically. It must therefore be concluded that the differentiation of Malayan limestones must continue to be based on fossils.
“…184 limestone specimens were analysed for calcium, magnesium and insoluble residue using basically the method of Archer, Fli nt and Jordan (1958), an undated manual by E. Merck,and Bisque (196 1), but incorporating modifications after Morris (1961) and Lewis, Nardozzi and Melnick (1961). The detailed procedure is fully described in Hutchison (1966).…”
A large and representative collection of specimens from each of the Malayan limestone formations was analysed chemically, mineralogically and petrographically in an attempt to find a criterion for differentiation independent of palaeontology. Limited success has been obtained only where the limestones are sufficiently far removed from granitic intrusions-in Perlis and Kedah, where significant lithological differences occur between limestones of different formations. Unfortunately the results cannot be extended to other areas and no generally applicable criterion for differentiation has been found. Extensive studies of the thermoluminescence of limestones show that all collected specimens have been recrystallised during the revolutionary phase of the Thai-Malayan orogeny so that thermoluminescence cannot be used in Malaya to differentiate limestones stratigraphically. It must therefore be concluded that the differentiation of Malayan limestones must continue to be based on fossils.
“…Cobalt was determined potentiometrically after its selective precipitation with a combination of 4-phenyl-3thiohvdantonic and thioglycollic acids (160a); it was determined colorimetrically with Nitroso-R salt (42) after a precipitation separation, or after solvent extraction separations (206,276) as the thiocyanate complex (104), as the stable thioglycolic acid complex (6), or as the phenazone-thiocyanate complex (206). Also a combination of ion exchange and solvent extraction separation \vas used before colorimetric determination (296).…”
Section: Cobaltmentioning
confidence: 99%
“…The use of EDTA in the analysis of slags and ores increased (44,75,77,146,197,206,244,371,SOI,317,330).…”
“…The composition of the samples was identified by the thermogravimetric analyzer (TG/DSC, Mettler Toledo, Switzerland). The concentration of the soluble Al ion was analyzed by the EDTA complex-Zn 2+ titration method[12].…”
A facile method was developed to synthesize Al(OH)3nanostructures from Al(OH)3microagglomerates by dissolution in 9.0 mol·L−1NaOH at 115°C followed by dilution and aging of the solution at room temperature. The influence of Al(OH)3nanoseed and surfactants as sodium dodecyl sulfate (SDS), polyethylene glycol 6000 (PEG6000), and cetyltrimethylammonium bromide (CTAB) on the formation of the Al(OH)3nano-structures was investigated. The experimental results indicated that the Al(OH)3microspheres composed of nanoparticles were prepared in the blank experiment, while dispersive Al(OH)3nano-particles with a diameter of 80–100 nm were produced in the presence of Al(OH)3nano-seed and CTAB.
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