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Extraction and Characterization of Surfactants from Atmospheric Aerosols
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Extraction and Characterization of Surfactants from Atmospheric Aerosols

Published on: April 21, 2017

[Surfacant sensitizing kinetic spectrophotometric determination of trace platinum]

J Li1, X Wang

  • 1Department of Applied Chemistry, Guilin Institue of Technology, 541004 Guilin.

Guang Pu Xue Yu Guang Pu Fen Xi = Guang Pu
|September 10, 2003
PubMed

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Precipitation Titration: Endpoint Detection Methods01:19

Precipitation Titration: Endpoint Detection Methods

In argentometric precipitation titrations, endpoints can be detected visually by the Mohr, Volhard, and Fajans methods. In the Mohr method, adding a soluble chromate indicator gives an initial yellow color to the analyte solution. As the titrant is added, the first excess of silver ions forms a red silver chromate precipitate, marking the endpoint. The solution pH should be maintained at about 8 by adding solid CaCO3.
In the Volhard method, a standard excess of AgNO3 is first added to the...