The aperture of Qualitative Filter Paper
The pore size of the qualitative filter paper is irregular, usually, the pore size of the qualitative filter paper is large and quantitative is small. The filter paper filter speed is different, the aperture is also different. Generally speaking, the pore size of the qualitative filter paper is large and there is no very strict regulation. The quantitative filter paper is divided into three types: fast, medium and slow. The aperture of the filter paper is about 80 μ 120 μ m, 30 μ 50 μ m, and 1 μ 3 μ m, respectively.
The pore size of the qualitative filter paper is irregular, usually, the pore size of the qualitative filter paper is large and quantitative is small. The filter paper filter speed is different, the aperture is also different. Generally speaking, the pore size of the qualitative filter paper is large and there is no very strict regulation. The quantitative filter paper is divided into three types: fast, medium and slow. The aperture of the filter paper is about 80 μ 120 μ m, 30 μ 50 μ m, and 1 μ 3 μ m, respectively.
The aperture of Quantitative Filter Paper
At present, the quantitative analysis filter paper produced in Hawach is divided into three categories: fast, medium and slow. White belt (fast), blue belt (medium speed) and red belt (slow speed) are used as the symbol classification on the filter carton. The shape of the filter paper is round and square. According to the diameter of circular fixed paper, it is divided into D7cm, D9cm, D11cm, D12.5cm, D15cm and D18cm. The square quantitative filter paper is 60cm × 60cm and 30cm × 30cm.
At present, the quantitative analysis filter paper produced in Hawach is divided into three categories: fast, medium and slow. White belt (fast), blue belt (medium speed) and red belt (slow speed) are used as the symbol classification on the filter carton. The shape of the filter paper is round and square. According to the diameter of circular fixed paper, it is divided into D7cm, D9cm, D11cm, D12.5cm, D15cm and D18cm. The square quantitative filter paper is 60cm × 60cm and 30cm × 30cm.
Experimental Suggestions
When using quantitative and qualitative analysis filter paper to filter precipitation, there are some suggestions:
1. Natural filtration is generally used to separate liquids and solid particles by using filter paper body and the ability to intercept solid particles;
2. Because the mechanical strength and toughness of the filter paper are as little as possible, if the filtration speed must be accelerated, in order to prevent filtration failure, layers of filter paper can be stacked in the funnel according to the pumping force, and when vacuum filtration is used, the filter paper can be stacked in the funnel according to the pumping force.
3. Do not filter hot concentrated sulfuric acid or nitric acid solution. The square qualitative filter paper is 60cm × 60cm and 30cm × 30cm.
When using quantitative and qualitative analysis filter paper to filter precipitation, there are some suggestions:
1. Natural filtration is generally used to separate liquids and solid particles by using filter paper body and the ability to intercept solid particles;
2. Because the mechanical strength and toughness of the filter paper are as little as possible, if the filtration speed must be accelerated, in order to prevent filtration failure, layers of filter paper can be stacked in the funnel according to the pumping force, and when vacuum filtration is used, the filter paper can be stacked in the funnel according to the pumping force.
3. Do not filter hot concentrated sulfuric acid or nitric acid solution. The square qualitative filter paper is 60cm × 60cm and 30cm × 30cm.
没有评论:
发表评论