This is how the that chemical/reagent is used in gold proccessing laboratory by VAT leaching.

SILVER NITRATE AgNo3.
--This reagent is titrated against cyanide sample solution in determining PPM of the cyanide in the solution

Potassium iodide KI
--It is used as an indicator for testing of cyanide PPM by titration with AgNo3.

Tin metal
--For making of steneous reagent for colour test in measuring gold PPM in the sample solution

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