+--------------------+----------------------+
            | voor filter?       | na filter?           |
+-----------+--------------------+----------------------+
| glucose   | JA                 | JA                   |
+-----------+--------------------+----------------------+
| zetmeel   | JA                 | NEE                  |
+-----------+--------------------+----------------------+
| zout      | JA                 | JA                   |
+-----------+--------------------+----------------------+