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Percentages of the suspected impurities based on the analyses on alkali oxide, boric oxide and water contents
| Compound | Impurity | Method of Analysis
|
||
|---|---|---|---|---|
| M2O | B2O3 | H2O | ||
|
|
|
|
|
|
| APT | B(OH)3 | 1.4 | 4.8 | |
| PPT | B(OH)3 | −0.2 | 2.6 | 0.4 |
| SPP | Na2B4O7·10H2O | 2.1 | 2.4 | 2.5 |
