ISO 5400:1984 Preview
Leather -- Determination of total silicon content -- Reduced molybdosilicate spectrometric method
This standard was last reviewed and confirmed in 2016. Therefore this version remains current.
Principle: oxydation of a test portion in a Parr bomb under alkaline conditions to destroy organic matter and to solubilize the mineral matter. Formation of molybdosilicate complex and spectrometric measurement at a wavelength of 630 nm.
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