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Testing Laboratory Directorate (TLD) is accredited to perform the testing of moisture content and the determination of the purity of xanthogenate, which is used in the ore-processing industry.
Validated intralaboratory methods are used for the determination of the purity of the xanthate: Hirchkind method, lead-acetate method and the iodometric method.
The water content (moisture) is determined using the departmental titrimetric method with an automated titrator (volume titration by Karl Fisher.)

If the client requires it, the test reports can also be issued both in Bulgarian and in English.