ASSAYING CARRYING OUT CHEMICAL

Brand Owner (click to sort) Address Description
XRAL SGS Supervision Services Inc./Services de Surveillance SGS Inc. Suite 1003, Scotia Plaza 100 Yonge Street Toronto, Ontario M5C 2W1 Canada assaying and carrying out chemical and other analyses of various materials;
XRAL SGS SOCIETE GENERALE DE SURVEILLANCE S.A. 1, Place des Alpes CH-1201 Geneve Switzerland assaying carrying out chemical and other analyses of various materials;
 

Where the owner name is not linked, that owner no longer owns the brand

    
Technical Examples
  1. The invention provides a method of assaying at least one element in a material including silicon. The method includes the steps of decomposing a portion of the material with an etching agent to form a solution containing hexafluorosilicic acid and at least one element to be assayed, heating the solution to a temperature sufficient to transform a substantial portion of the hexafluorosilicic acid into silicon tetrafluoride and to cause at least some of the silicon tetrafluoride to evaporate, such that a solution for assaying is obtained in which the silicon content is reduced while and the elements to be assayed are conserved; and assaying at least one element contained in the solution. The invention is applicable to the field of manufacturing substrates or components for optics, electronics, or optoelectronics, and in particular to the field of quality control.