Thiourea
Test items Index
Thiourea % ≥ 99
Heating Loss % ≤ 0.4
Ash % ≤ 0.1
Water insoluble matter % ≤ 0.02
Thiocyanate % ≤ 0.02
Melting point ℃ 171
Packaging: 25kg、1000kg weaving.
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Hydrochloric acid |
Item Index
Total acidity(HCI) ≥ 31.0
Iron(Fe) ≤ 0.002
Residue on ignition % ≤ 0.05
Free chlorine(CI)% ≤ 0.004
Arsenic(As)% ≤ 0.... |
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Sulphuric acid |
Item Index
Concentrated sulfuric acid Fuming sulfuric acid
Sulphuric acid(H2SO4)% ≥ 92.5or98.0 -
Free sulfur trioxide(SO4)% ≥ - 20.0or25.... |
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Resin-specific adsorption of gold |
Indicator Parameter
Functional group -N+(CH3) 2H2O
Appearance Milky white opaque sphere
Finished form CLˉ
Moisture content % 45-55
Weight... |
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Coconut shell activated carbon |
Item Index
Iodine value(mg/g) ≥ 900
Filling density(g/cm3) 0.45
Loss on drying(%) ≤ 10
Strength(%) ≥ 97
PH value 6-8
Granularity (ey... |
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Sodium cyanide |
Test items Index
Shape Lump
Sodium cyanide (NaCN) % ≥98.0
Sodiun hydroxide (NaOH) % ≤0.5
Sodium carbonate (Na2CO3) % ≤0.5
Water (H2O... |
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