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  1. No Access

    Article

    Spectralanalyse

    H. Osann, Dr. Garthe, O. N. Rood, D. Brewster… in Zeitschrift für analytische Chemie (1863)

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    Article

    Photochemical estimation of mercuric chloride by Eder's reaction with ceric ion as sensitiser

    It has been shown that the sensitising action of ceric salts on Eder's reaction could be employed for the quantitative estimation of mercuric chloride by determining the calomel formed iodometrically. The photoch...

    M. N. Sastri, Ch. Kalidas in Fresenius' Zeitschrift für analytische Chemie (1955)

  3. No Access

    Article

    Volumetric determination of iron by reduction with hypophosphite

    A new method for the reduction of Iron (III) to Iron (II) with hypophosphite is suggested. The iron solution is treated with an excess of sodium hypophosphite and hydrochloric acid (overall concentration 2 N) ...

    M. N. Sastri, Ch. Radhakrishnamurti in Fresenius' Zeitschrift für analytische Chemie (1955)

  4. No Access

    Article

    Colorimetric estimation of thorium with carmine red

    The use of carmine red as a colorimetric reagent for thorium in presence of a 20 fold excess of cerite earths or a 5 fold excess of uranyl salts is described, pH of 2.5 and the wavelength 560 mμ were found most s...

    N. Eswaranarayana, Bh. S. V. Raghava Rao in Fresenius' Zeitschrift für analytische Chemie (1955)

  5. No Access

    Article

    Estimation of ferric salts through photochemical reduction with oxalic and lactic acids

    1. The photochemical reduction of ferric sulphate in sunlight by oxalic and lactic acids has been studied with a...

    G. Gopala Rao, G. Aravamudan… in Fresenius' Zeitschrift für analytische Che… (1955)

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    Article

    Gravimetric estimation of uranium as oxinate using complexone as a masking agent

    The scope of complexone (disodium salt of ethylenediamine tetraacetic acid) as masking agent has been further extended. Uranium is estimated as oxinate in presence of Th, R. E. and Zr. Uranium is also estimate...

    R. N. Sen Sarma, A. K. Mallik in Fresenius' Zeitschrift für analytische Chemie (1955)

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    Article

    A new volumetric method for the estimation of uranium VI through photochemical reduction with alcohol

    1. A new volumetric method for the estimation of uranium VI has now been developed. The method consists in expos...

    G. Gopala Rao, V. Panduranga Rao… in Fresenius' Zeitschrift für analytische Che… (1956)

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    Article

    Rapid volumetric method for the estimation of iron in presence of interfering ions

    It has been shown that in the photochemical reduction method for the volumetric estimation of iron, there is no interference by chromium, titanium, tungsten, molybdenum, manganese, cobalt, nickel and fluoride....

    M. N. Sastri, Ch. Kalida in Fresenius' Zeitschrift für analytische Chemie (1956)

  9. No Access

    Article

    Cerimetric estimation of indigo carmine

    1. The possibility of determining indigo carmine by direct titration with a standard solution of ceric sulphate ...

    G. Gopala Rao, N. Venkateswara Rao… in Fresenius' Zeitschrift für analytische Che… (1956)

  10. No Access

    Article

    Volumetric estimation of indigo and indigo sulphonic acid with potassium dichromate

    The reaction between indigo sulphonate and chromic acid has been studied under various conditions, with a view to its analytical application. When indigo sulphonate is treated with an excess of chromic acid in...

    G. Gopala Rao, N. Venkateswara Rao in Fresenius' Zeitschrift für analytische Chemie (1956)

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    Article

    Potentiometric determination of Silver (I) by potassium iodate

    A potentiometric method has been described for the determination of Silver(I) using standard Iodate solution with pure metallic silver plate as the indicator electrode. Accurate results have been obtained at a...

    M. N. Radhakrishna in Fresenius' Zeitschrift für analytische Chemie (1956)

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    Article

    Cerate-chromate oxidimetry

    Oxalic acid is oxidised to carbon dioxide and water with sulphatocerate in dilute sulphuric acid medium. Formic acid is not affected by ceric sulphate under the above conditions. Both oxalic and formic acids a...

    N. N. Sharma in Fresenius' Zeitschrift für analytische Chemie (1957)

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    Article

    Induced reactions in cerimetry

    1. We have found that oxalic acid interferes in the cerimetric estimation of indigo sulphonate. The induction fa...

    G. Gopala Rao, N. Venkateswara Rao in Fresenius' Zeitschrift für analytische Chemie (1957)

  14. No Access

    Article

    Cerate-Chromate oxidimetry

    1. Sulphato-cerate solution in the presence of chromium ions and sulphuric acid has been suggested as a new oxid...

    N. N. Sharma in Fresenius' Zeitschrift für analytische Chemie (1957)

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    Article

    Induced reactions in cerimetry Part II

    1. Contrary to the customary belief that cerimetric titrations of iron(II) are not affected by induced reactions...

    G. Gopala Rao, P. Jagan Mohan… in Fresenius' Zeitschrift für analytische Chemie (1957)

  16. No Access

    Article

    Separation of thorium from rare earths

    A method for separation of thorium from rare earths in monazite based on the difference of stability of EDTA complexes towards oxine is described.

    T. Suryanarayana Murthy, D. V. N. Sarma in Fresenius' Zeitschrift für analytische Chemie (1958)

  17. No Access

    Article

    Cerate-chromate oxidimetry

    In dilute sulphuric acid medium formaldehyde is oxidised to formic acid. Formic acid does not reduce any ceric sulphate under the above conditions. However formic acid is oxidised quantitatively to carbon diox...

    N. N. Sharma in Fresenius' Zeitschrift für analytische Chemie (1958)

  18. No Access

    Article

    A rapid method for the separation of tantalum from niobium and of the mixed oxides from zirconia

    B. S. Krishna Rao, D. V. N. Sarma… in Fresenius' Zeitschrift für analytische Che… (1958)

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    Article

    Separation of lanthanum from other cerite earths excluding cerium

    Employing the differences in pH for the precipitation of chromates of the lanthanons, lanthanum has been successfully separated from the rest of the family. Cerium however should be absent. A pH of 5.7 is best su...

    P. Jayarama Reddy, D. V. N. Sarma… in Fresenius' Zeitschrift für analytische Che… (1958)

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    Article

    Use of p-Cresotic acid and its various derivatives for the estimation of thorium and zirconium

    p-Cresotic acid and its nitro, bromo, sulfo, acetyl, benzoyl and hydrazine derivatives and 5-methyl salicylic-o-aeetic acid have been used for the estimation of thorium and zirconium. The precipitates obtained...

    S. P. Agrawal, Prof. Dr. R. C. Aggrawal… in Fresenius' Zeitschrift für analytische Che… (1959)

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