Items

Specification

Appearance:

Dark-green to blue black powder

Absorptance(E^1% _1cm 405nm):

Not less than 565

Absorptance(E^1% _1cm 630nm):

Not less than 145

Assay:

Not less than 100%

Extinction Ratio:

3.0-3.9

pH value:

9.0-10.7

Loss on Drying:

Not more than 4.0%

Residue on ignition:

Not more than 30%

Pb:

Not more than 10ppm

Arsenic:

Not more than 2ppm

Hg:

Not more than 1ppm

Cd:

Not more than 1ppm

Na:

5.0 -7.0%

Fe:

Not more than 0.2%

Total Copper:

4.0-6.0%

Free Copper:

Not more than 0.20%

Chelated copper:

Not less than 4%

Nitrogen:

Not less than 4%

Fluorescence:

None

Total Plate Count:

Not more than 1000/g

Mould and YeastCount:

Not more than 100/g

Coliforms

Not more than 3/g

Salmonella:

Negative

E. Coli:

Negative

Pathogenic Bacteria:

Absent