Quantitative filter paper is mainly used for weighing analysis experiments after filtration, namely gravimetric analysis tests in quantitative chemical analysis and corresponding analysis tests. The ash weight of each filter paper after ashing is a fixed value. Qualitative filter paper is used for general filtration, namely qualitative chemical analysis, and corresponding filtration separation.
In the manufacturing process of quantitative filter paper, the pulp is treated by hydrofluoric acid and hydrochloric acid, and washed by distilled water to remove most impurities in the paper fiber, so the residual ash after burning is very little, which has little impact on the analysis results, and is suitable for precise quantitative analysis. The amount of ash produced after ashing does not exceed 0.007%.
1. Ashless – extremely low ash content <0.007%
2. We provide from the slow, medium, fast flow rate
3. The residual ash content is very little and has little influence on the analysis results
Hawach technical data of quantitative filter paper