Zinc — Determination of copper content — Spectrophotometric method
Specifies two methods applicable to Zn 99,995, Zn 99,99, Zn 99,95, Zn 99,5 and Zn 98,5. The first method is suitable for the determination of copper contents between 0,0005 and 0,005 %. The second method applies to copper contents between 0,0025 and 0,1 %.
Zinc — Determination of cadmium content — Polarographic method
This method applies to the following types of zinc: Zn 99,95, Zn 99,5, Zn 98,5 and Zn 98 having cadmium contents between 0,01 and 0,5 %. It does not apply to zinc the copper content of which is more than four times higher as the cadmium content.
Zinc and zinc alloys — Determination of iron content — Spectrophotometric method
The method is applicable to the following zinc alloys: Zn Al 4, Zn Al 4 Cu 1, Zn Al 4 Cu 3, Zn Al 11 Cu 1. It is moreover applicable to die castings made from these alloys, and to zinc containing more than 0,01 % of copper. The method is suitable for the determination of iron contents between 0,01 and 0,08 %.
Zinc alloys — Determination of aluminium content — Volumetric method
The method is applicable to certain zinc alloys (see ISO 301) and to die castings made from these alloys. Specifies principle, reagents, apparatus, sampling, procedure, expression of results and test report.
Zinc and zinc alloys — Determination of tin content — Spectrophotometric method
The method is applicable to certain types of zinc (see ISO 752) and to certain zinc alloys (see ISO 301) and to die castings made from these alloys. It allows generally the determination of tin contents between 0,0005 and 0,005 %. Specifies principle, reagents, apparatus, sampling, procedure, expression of results and test report.
Zinc alloys — Determination of copper content — Electrolytic method
The method is applicable to zinc alloy Zn Al 4 Cu 1. It is suitable for the determination of copper contents between 0,5 and 3,5 %. This International Standard specifies principle, reagents, apparatus, sampling, procedure, expression of results and test report.
Sodium hydroxide for industrial use — Determination of carbonates content — Titrimetric method
Applicable to products having contents, expressed as CO2 , of more than 0.01 % (m/m). Relates to a procduct containing neither sulphides nor chlorates or only sulphides or only chlorates. Preliminary test by boiling an acidified test sample in the presence of methyl orange and with a lead acetate paper strip in the vapour. The sulphides blacken the paper and chlorates delolourize the methyl…
