??? ? ??? ??

?? : Na2WO4?2H2O.2H2O
?? : ???? ? ??? ?? ?? ?? ???,,, ??? ?? ??.
?? :
| ?? ?? | ????? ??? | ??? 1 | ??? 2 |
| Na2WO4.2H2O | 99 | 98 | 97 |
| Mo | 0.001 | 0.02 | -- |
| AS | 0.001 | 0.001 | 0.001 |
| Cu | 0.0005 | 0.001 | 0.001 |
| Fe | 0.001 | 0.001 | 0.005 |
| Si | 0.004 | 0.04 | 0.04 |
| ??? | 0.005 | 0.05 | 0.05 |
| PH | 8.5-9 | 8.5-9 | 8.5-9 |



