CHEMICAL PURITY and TRACE OF IMPURITIES
Analysis of our Copper requires methods appropriate to this level of purity, very good preparation of equipment, super-quality and super-pure materials and instruments (chemical substances, cutters and other work tools) for preparation of the copper sample for analysis, and the highest qualification level of the laboratory personnel.
Chemical purity, maximum impurity content, current grades / grades are determined according to the methods and tests performed:
- Basic Grade - basic quality. The process parameters were studied and established to achieve a quality of at least Cu OF 5N5 according to GOST 859-2001 and ASTM B170 (USA).There are difficulties in measuring this level with available methods and laboratories.
- Extra Grade - additional quality, an experimental process to achieve OF 6N and above according to GOST 859-2001, ASTM B170. There are no accessible methods and laboratories capable of the required level of measurement.
Max- and Typical- impurities by SSMS+GDMS are not for the best tests, some possible inaccuracies and small possible mistakes were taken into account and added, but still they are for the sufficiently qualified measurement. For Min of impurities there is need for the highest level of testing, also possibly by other methods appropriate to this level. Limits of sensitivity " <x - <0.00x " were considered (were subtracted from 100 %) at calculation of purity as corresponding quantity of impurities.
Wishes of the customer to additional restrictions of impurities besides our specified current standards can be considered, if it is possible to fulfil it. Own technology, an opportunity of achievement of the specified parameters.