| ≥1 piece |
|
Sense index |
|||
|
Items |
index |
||
|
Vc grade |
Food grade |
Daily chemical industry grade |
|
|
Appearance |
Colourless or yellowish , clear and transparent liquid |
||
|
Chemical and Physical index |
||||
|
Items |
Unit |
index |
||
|
Vc grade |
Food grade |
Daily chemical industry grade |
||
|
Content ( dry basis ) |
% |
98.5 |
70 |
80-92 |
|
Solid substance |
% |
80-92 |
70 |
70 |
|
DE ( dry basis ) |
% |
0.15 |
0.2 |
0.2 |
|
PH |
|
5.0-7.0 |
5.0-7.0 |
5.0-7.0 |
|
Hygiene index |
|||
|
Items |
Vc grade |
Food grade |
Daily chemical industry grade |
|
Heavy metal |
5mg/kg |
5mg/kg |
5mg/kg |
|
Nickle |
1mg/kg |
1mg/kg |
1mg/kg |
|
Pb(Pb2+) |
0.5mg/kg |
0.5mg/kg |
0.5mg/kg |
|
As(As3-) |
0.5mg/kg |
0.5mg/kg |
0.5mg/kg |
|
Sulphate ash |
0.1% |
0.1% |
0.1% |
|
Chlorid |
10mg/kg |
20mg/kg |
20mg/kg |
|
Sulphate |
30mg/kg |
30mg/kg |
30mg/kg |