What is BS 1728-18 – Aluminium and aluminium alloys about?
BS 1728-18 standard is a part of the BS 1728 series that discusses the determination of zinc using EDTA or polarographic method for the analysis of aluminium and aluminium alloys. Aluminium alloys are widely used in engineering structures and components requiring lightweight or corrosion resistance.
Who is BS 1728-18 – Aluminium and aluminium alloys for?
BS 1728-18 on zinc applies to:
- Manufacturer of zinc and aluminium alloys
- Quality testing personnel
- Design engineers
Why should you use BS 1728-18 – Aluminium and aluminium alloys?
Aluminium alloys are widely used in engineering structures and components requiring lightweight or corrosion resistance. The methods of polarography can be used to follow the progress of a titration that produces or consumes some electroactive species. The voltage applied to the working electrode is constant and sufficient to provide the diffusion-limited current for the observable analyte.
BS 1728-18 provides you with the principle of the polarographic method in which the sample is dissolved in hydrochloric acid and zinc is separated from other elements by absorption onto an anion exchange resin from a 2N hydrochloric acid solution. Zinc is removed from the resin with N/200 hydrochloric acid and determined either volumetrically with EDTA or polarographically. This method is recommended for zinc contents between 0.01 and 0.25 %, and the volumetric method for zinc contents between 0.10 and 12.0 %.
Overall, BS 1728-18 exemplifies zinc using polarographic for the analysis of aluminium and aluminium alloys.
