Solid content refers to the percentage or mass fraction of solid material contained in a liquid. It is a measure that describes the concentration or content of solids in a liquid. Solid content is often used to describe the content of solid substances in various liquid systems such as solutions, suspensions, emulsions and colloids.
The formula for calculating solid content is:
Solid content (%) = (solid mass/total mass) x 100
Among them, the solid mass refers to the mass of the solid substance contained in the liquid, and the total mass refers to the total mass of the liquid (including the mass of the solid substance and the mass of the solvent or medium).
Method for determination of solid content
The method of determination of solid content varies according to the properties of liquid and solid substance. Common solid content determination methods include weighing method, drying method, filtration method, centrifugal method, etc. The specific determination method should be selected according to the liquid system and experimental requirements. The determination of solid content is very important for the production and quality control of liquid system. In various industrial fields, such as chemical, food, pharmaceutical, textile, etc., solid content measurement is often used to monitor and adjust the composition and nature of products, to ensure product quality and production effect.
Drying method: The liquid sample to be tested is placed in a pre-weighed container, and the solvent in the liquid is evaporated or volatilized by heating or vacuum drying, leaving solid material. Then weigh the solid substance and calculate the solid content.
Centrifugation: Separating suspended particles or precipitates from liquids by centrifugation, and then drying and weighing the separated solids. The solid content is calculated according to the mass of the solid substance and the total mass of the liquid sample.
Filtration method: Filter paper or microporous membrane is used to filter liquid samples, and solid particles or sediments are captured on the filter medium. The filter medium is then dried with the solid material and its mass is weighed. Solid content is calculated by comparing the mass of the solid substance with the total mass of the liquid sample.
Method for determination of solid content
Post-dissolution determination method: the liquid sample to be tested is completely dissolved, and appropriate analytical methods (such as spectroscopy, colorimetry, specific gravity, etc.) are used to determine the concentration or content of solid substances in the solution. Solid content is then calculated based on the concentration of the solid substance and the total volume or mass of the liquid sample.
Method for determination of solid content
Basic operation steps:
Drying method:
a. Prepare to weigh the container and record the mass of the container.
b. Transfer the liquid sample to the container.
c. Use a heating device or a vacuum dryer to evaporate or volatilize the solvent in the liquid sample, leaving behind the solid material.
d. Place the container in the dryer with the solid substance and allow it to dry completely. e. Weigh the dried containers and solids and record the mass value.
f. Calculate solid content based on the mass of solid substance and the total mass of liquid sample.
Centrifugal method:
a. Prepare the centrifuge tube or centrifuge and record its mass.
b. Pour the liquid sample to be measured into the centrifuge tube.
c. Use a centrifuge to centrifuge liquid samples and separate solid particles or sediments.
d. Transfer the solid material obtained by centrifugation to a drying container.
e. Place the container in the dryer with the solid substance and allow it to dry completely.
f. Weigh the dried containers and solids and record the mass value. g. Calculate solid content based on the mass of solid substance and the total mass of liquid sample.
Filtration method:
a. Prepare the filter device, including filter paper or microporous film, filter funnel, etc.
b. Pour the liquid sample to be tested into the filter funnel and filter the liquid through the filter paper or microporous membrane.
c. Leave solid particles or sediment on the filter paper or microporous film.
d. Transfer the filter paper or microporous film and solid material to the drying container.
e. Place the container in the dryer with the solid substance and allow it to dry completely. f. Weigh the dried containers and solids and record the mass value.
g. Calculate solid content based on the mass of solid substance and the total mass of liquid sample.
Post-dissolution method:
a. Prepare an appropriate solvent and completely dissolve the liquid sample to be tested.
b. According to the determination requirements, select appropriate analytical methods, such as spectroscopy, colorimetric method, specific gravity method, etc., to determine the concentration or content of solid substances in the solution.
c. Record the determination results, including the concentration of the solid substance and the total volume or mass of the liquid sample.
d. Calculate solid content based on concentration and total volume or mass.
The above are the basic operation steps, specific operation should be according to the experimental requirements and methods to select appropriate instruments and reagents, and in accordance with the relevant operating procedures and standards for operation. The determination method of solid content should be selected according to the specific sample characteristics and measurement requirements. Different methods are applicable to different types of solid material and liquid samples. When determining solid content, the corresponding operating procedures and standards should be followed to ensure the accuracy and repeatability of the measurement results.