Differential Dissolution Phase Analysis (DDPA)

Objects of study

• Solid inorganic substances both crystalline and amorphous.
• Crystals, powders, ceramics, thin films and others may be studied by this method.

Applications

• The qualitative and quantitative phase analysis.
• Microphase analysis is possible:
  • phase determination in the sample with the weight up to 1 mg;
  • determination of the extrinsic phases;
  • definition of the phase extrinsic component distribution.

The method may be used in regulation of phase composition during preparation and exploitation of the heterogeneous catalysts, high temperature superconductors, luminescent solids, magnetic materials, inorganic pigments, products of mechanochemical activation, for the study of archeological findings and others.

Simultaneous phase classification of 38 chemical components is possible.

The sensibility of component determination is up to 10^–3 mkg/ml.

An error of the stoichiometric coefficient estimation in the phase formula is up to 10%.

Method uniqueness: determination of the empirical phase formula and their quantitative content in multi-phase samples is performed without reference samples of the corresponding individual phases.

Instrument facilities

The method is based on the regularities of stoichiography and dynamic diffusion regime. Inductively coupled plasma atomic-emission spectrometer (PST “Baird”) is used as a detector.

Samples requirements

Sample weight – from milligrams up to grams.

Leading scientists and their research interests

Prof. V.V. Malakhov and Dr. A.A. Vlasov. Phase analysis of the solid inorganic substances.