The Difference Between Qualitative and Quantitative Filter Paper
Difference Between Qualitative and Quantitative Filter Paper
The filter paper commonly used in chemical experiments is divided into quantitative filter paper and qualitative filter paper. The difference between the two is that the quality of the ash after ignition is different. The ash content of the quantitative filter paper is very low, such as a Φ125 mm quantitative filter paper with a mass of about 1 g. The ash content after burning is less than 0.1 mg, which is less than the sensitivity of the analytical balance.
In gravimetric analysis, it can be ignored, so it is also called filter paper ashless. In fact, this kind of filter paper is not reallysno ashless after burning but has very little ash. The weight of each ash is known and the maximum is not more than 0.1 mg. Under normal circumstances, this ash does not affect the final measurement result. Qualitative filter paper has a lot of ash after burning, which is not suitable for gravimetric analysis. According to the difference of filtration speed and separation performance, it can be divided into three types: fast, medium, and slow.
Qualitative vs Quantitative Filter Paper
At present, the quantitative analysis filter paper produced in China can be divided into three categories: fast, medium speed, and slow speed. The white band (fast), the blue band (medium speed), and the red band (slow speed) are used as markers to classify the filter paper box. The shape of the filter paper has two kinds: round and square. According to the diameter, the specifications of circular paper can be divided into d9cm, d11cm, d12.5cm, d15cm, and d18cm. Quantitative filter paper has 60 cm x 60 cm and 30 cm x 30 cm.
In addition, quantitative vs qualitative filter paper is that qualitative filter paper is used for qualitative chemical analysis and corresponding filtration separation, and quantitative filter paper is used for gravimetric analysis test and corresponding analysis test in quantitative chemical analysis.
The quantitative filter paper is mainly used for ashing weighing analysis experiments after filtration. The ash weight of each filter paper after ashing is a fixed value. The qualitative filter paper is used for general filtration.
The main difference between quantitative filter paper and qualitative filter paper is the amount of ash produced after ashing. The main difference between quantitative filter paper and qualitative filter paper is the amount of ash produced after ashing. Qualitative filter paper does not exceed 0.13%, quantitative filter paper does not exceed 0.0009%. Ashless filter paper is a kind of quantitative filter paper, its ash content is less than 0.1 mg, this weight can be neglected in the analytical balance. Note that both quantitative filter paper and qualitative filter paper are concepts of cellulose filter paper.