Quantitative Filter Paper Or Qualitative Filter Paper?
Quantitative filter paper or qualitative filter paper, it is a question.
While at the very beginning, we can distinguish from the literal meaning between quantitative and qualitative.
Quantitative refers to fixed quantity, more about physical properties. Qualitative refers to fixed quality, more about chemical properties.
Most impurities were removed by hydrochloric acid, hydrofluoric acid, and distilled water during fabricating quantitative filter paper. So, the effect of filter paper quantity can be neglected. This characteristic benefits ashing weighing analysis experiment after filtration also called gravimetric analysis test and corresponding analytical test in quantitative chemical analysis,
Hawach has 3 kinds of quantitative filter paper according to its filtration speed, fast, medium and slow. 3 kinds according to impurity content, that is, ashless grade (Ash Content 0.007%), hardened low ash (Ash Content 0.015%), hardened ashless (Ash Content0.006%).
Qualitative filter paper usually was added in a small amount of chemical stabilizer to increase the bursting resistance, therefore be stronger and more durable during the test. But pay attention to Kay nitrogen test, cuz nitrogen in the stabilizer will has an effect on the result.
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