Products Catalog
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品質(zhì)標(biāo)準(zhǔn)
Quality standard
|
項目 Item |
指標(biāo) |
||
|
優(yōu)等品 Premium Grade |
一等品 First grade |
合格品 Qualified product |
|
|
主含量（以Na2S2O） Main content (as Na2S2O) |
96.0 |
94.0 |
92.5 |
|
鐵（Fe）含量 % Ferrum (as Fe) |
≤0.005 |
≤0.010 |
≤0.015 |
|
水不溶物含量 % Water insoluble |
≤0.05 |
≤0.05 |
≤0.10 |
|
砷（As）含量 % Arsenic |
≤0.0001 |
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