One-step microwave digestion procedures for the determination of aluminium in steels and iron ores by inductively coupled plasma atomic emission spectrometry

Abstract

The use of microwave ovens for the dissolution of samples is widespread and has made it possible to obtain results very rapidly giving precision and accuracy identical with, or better than, than that obtained by classical procedures. Technical publications and instruction manuals, however, rarely give information on the dissolution of insoluble compounds in acids such as, for example, compounds of aluminium the determination of which in iron and steel is important in iron and steel industrial laboratories. Procedures are proposed for the dissolution of aluminium in iron ores and steels; the procedures were tested using certified reference materials. For steels, dissolution is accomplished far faster than with classical procedures. Preliminary dissolution tests on pure alumina, under controlled temperature and pressure conditions, were necessary in order to determine the optimum conditions for the dissolution of iron ores. Complete dissolution of an iron ore sample takes approximately 90 min.

Determination of 135Cs concentration and 135Cs/137Cs ratio in waste samples from nuclear decommissioning by chemical separation and ICP-MS/MS

“…Aqua regia has been widely used for dissolution of steels [22,23], however, it contains huge amount of chloride, and the obtained solution cannot be used for the determination of 36 Cl. If only radiocesium is determined, the steel materials can be dissolved using aqua regia, which is also relatively faster compared to using only H2SO4.…”

Rapid Microwave Digestion Procedures for the Elemental Analysis of Alloy and Slag Samples of Smelted Ocean Bed Polymetallic Nodules

“…Use of microwave digester for sample preparation is gaining substantial important day by day. Many researchers used this method for sample preparation and validated the same [11][12][13][14]. erefore, microwave-assisted closed vessel digestion was tried for alloy and slag samples of smelted manganese nodules.…”