Different Applications of Qualitative and Quantitative Filter Paper
The biggest feature of filter paper is paper with good filtration performance. At present, the filter papers produced in China mainly include quantitative analysis filter paper, qualitative analysis filter paper and chromatographic qualitative analysis filter paper.
Quantitative filter papers are cellulose filter papers, as are qualitative filter papers. They are not suitable for other types of filter paper, such as glass microfiber filter paper.
1. The general qualitative filter for filtering solution, chloride, sulfate and so do not need the qualitative test of numerical calculation; and quantitative filter paper is used for numerical calculation of the precision filter.
Qualitative analysis filter paper generally has more residual ash, which is only used for general qualitative analysis and for filtering precipitation or suspension in solution but can not be used for quality analysis.
The types and specifications of qualitative analysis filter paper are basically the same as those of quantitative analysis filter paper, indicating fast, medium and slow speed, but printing fast, medium and slow words.
2.Quantitativ e analysis filter paper in the manufacturing process, the pulp is treated with hydrochloric acid and hydrofluoric acid and washed with distilled water. Most of the impurities in the paper fibers are removed, so the residual ash after burning is very small, which has little effect on the analysis results. It is suitable for precise quantitative analysis.
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