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Item

Requirement

Chemical method

Physical method

Adsorption   Methylene blue.ml/0.1g≥

                    Vitriol quinin mg/g≥

 11

 11

 120

120 

 PH value

 5-7

5-7 

 Moisture content

 10

10 

 Iron(fe²⁺)%≤

 0.02

0.02 

 Chloride(cl^-)≤

 0.1

0.1 

 Sulfate(SO_4^2-)%≤

 0.1

0.1 

 Ash content%≤

 3

3 

 Acid melting%≤

 0.8

0.8 

 Heavy metal(count as pb²⁺)%≤

 up to grade

  up to grade

 Water-solubility zinc salt(Zn²⁺)≤

 0.005

0.005 

 Sulfide(S^2-)

  up to grade

  up to grade

 Cyanide(CN^{- g/l)}

  up to grade

  up to grade

 Uncarbonized material

  up to grade

  up to grade