Iron ores — Determination of titanium content — Diantipyrylmethane spectrophotometric method
The method ist applicable to a concentration range of 0,01 to 6,0 % (m/m) of titanium in natural iron ores, and iron ore concentrates and agglomerates including sinter products. Specifies principle, reagents, apparatus, sampling and samples, procedure, expression of results, and test report. ISO 4691 includes three annexes.
Steel and cast iron — Determination of nickel content — Flame atomic absorption spectrometric method
The method is applicable to nickel contents between 0.002 % (m/m) and 0.5 % (m/m). Specifies principle, reagents, apparatus, sampling, procedure, expression of results and test report. Annex A gives additional information on the international co-operative tests, and Annex B represents the precision data graphically.
Nickel — Determination of silver, bismuth, cadmium, cobalt, copper, iron, manganese, lead and zinc c...
Applies to refined, wrought and cast nickel within the ranges specified in table 1. The method is applicable to the independent determination of any one or more of the elements listed. The lower level for iron can be extended to less than 0,0025 % (m/m) provided a special standard solution is prepared. The upper limit for the determination of cobalt and copper can be raised to 2 % (m/m) by a…
Ferronickel — Determination of nickel content — Dimethylglyoxime gravimetric method
Applies to nickel contents in the range 15 to 60 % (m/m). Specifies principle, reagents, apparatus and samples, procedure, expression of results and test report. Annex A is provided for the determination of nickel in combined filtrates by atomic absorption spectrometry. Annex B gives a statistical report of interlaboratory tests.
Applies to the determination of the given elements of high purity, refined, wrought and cast nickel within the ranges specifies in table 1. This method is applicable to the indipendent determination of any one or more of the elements listed. Annex A gives an alternative method for preparation of nickel nitrate solution for electrothermal atomic analysis, and annex B contains a statistical report…
Oils of lemon and petitgrain citronnier, and oil of lime obtained by a mechanical process — Determin...
The method consists in analyzing a small quantity of essential oil on a column of small diameter but great length under specified conditions. The citral content is determined by using the internal standard method. Polyethylene glycol 20000 is used as stationary phase. Operating temperatures: Oven: linear temperature programming from 80 to 180 °C at a rate of 2 °C/min. Injection system: about 190…
Steel and cast iron — Determination of copper content — Flame atomic absorption spectrometric method
The method is applicable to copper contents between 0.004 % (m/m) and 0.5 % (m/m). Specifies principle, reagents, apparatus, sampling, procedure, expression of results and test report. Annex A gives additional information on the international co-operative tests. Annex B includes the graphical representation of precision data.
Nickel — Determination of sulfur content — Methylene blue molecular absorption spectrometric method ...
Applies to the determination of the sulfur content of refined nickel in the range 0,0001 to 0,002 % (m/m). Specifies principle, reagents and materials, apparatus, sampling and samples, procedure, expression of results, some notes and test report.
