Phosphoric acid for industrial use — Determination of calcium content — Titrimetric method
The general method is applicable to phosphoric acid not containing polyphosphoric acids and to products having a calcium content equal to or greater than 0.020 % (m/m). In special cases a preliminary hydrolysis of polyphosphoric acids is carried out by prolonged boiling in the presence of hydrochloric acid. Precipitation of calcium as calcium oxalate at pH 4 0.3, filtration of the precipitate,…
Manganese ores — Determination of vanadium content — Titrimetric method and phosphotungstovanadate p...
Method I is applicable to manganese ores having vanadium contents greater than 0.05 % (m/m), method II is applicable to manganese ores having vanadium contents less than 0.05 % (m/m). This second edition cancels and replaces the first edition (i.e. ISO 553-1975). Should be read in conjunction with ISO 4297.
This second edition cancels and replaces the first edition (i.e. ISO 548-1975). Should be read in conjunction with ISO 4297. Specifies principle, reagents, apparatus, sample, procedure and expression of results.
Aluminium and aluminium alloys — Determination of zinc content — Flame atomic absorption spectrometr...
The method is applicable to products having zinc contents between 0,002 and 6 % (m/m). Specifies principle, reagents, apparatus, sampling, procedure, expression of results and test report.
Wood — Determination of radial and tangential shrinkage
Specifies a method which determines the linear dimensions of test pieces after drying at a moisture content in equilibrium with the normal environment and at a moisture content equal to or greater than the saturation point of the cellular wall of wood.
Should be read in conjunction with ISO 4297. Specifies principle, reagents, apparatus, sample, procedure and expression of results. A figure gives an example of apparatus.
