Conținutul de solid se referă la procentul sau fracția de masă a materialului solid conținut într-un lichid. 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, suspensii, emulsions and colloids.

The formula for calculating solid content is:

Continut solid (%) = (masa solida/masa totala) X 100

Printre ei, 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).

Metoda de determinare a conținutului de solide

The method of determination of solid content varies according to the properties of liquid and solid substance. Metodele comune de determinare a conținutului de solide includ metoda de cântărire, metoda de uscare, metoda de filtrare, centrifugal method, etc. Metoda de determinare specifică trebuie selectată în funcție de sistemul lichid și cerințele experimentale. The determination of solid content is very important for the production and quality control of liquid system. În diverse domenii industriale, cum ar fi chimica, alimente, farmaceutic, 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.

Metoda de uscare: The liquid sample to be tested is placed in a pre-weighed container, iar solventul din lichid este evaporat sau volatilizat prin încălzire sau uscare în vid, leaving solid material. Then weigh the solid substance and calculate the solid content.

Centrifugarea: 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.

Metoda de filtrare: 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.

Metoda de determinare a conținutului de solide

Post-dissolution determination method: proba lichidă de testat este complet dizolvată, and appropriate analytical methods (precum spectroscopia, colorimetrie, gravitație specifică, 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.

Metoda de determinare a conținutului de solide

Etapele operaționale de bază:
Metoda de uscare:

A. Pregătiți-vă să cântăriți recipientul și să înregistrați masa recipientului.

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. Pregătiți tubul de centrifugare sau centrifuga și înregistrați-i masa.

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.

Metoda de filtrare:

A. Pregătiți dispozitivul de filtrare, including filter paper or microporous film, pâlnie de filtrare, 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, precum spectroscopia, colorimetric method, specific gravity method, etc., pentru a determina concentrația sau conținutul de substanțe solide din soluție.

c. Record the determination results, inclusiv concentrația substanței solide și volumul sau masa totală a probei lichide.

d. Calculați conținutul de solide pe baza concentrației și a volumului total sau a masei.

Cei de mai sus sunt pașii operaționali de bază, 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. Metoda de determinare a conținutului de solide trebuie selectată în funcție de caracteristicile specifice ale eșantionului și cerințele de măsurare. Different methods are applicable to different types of solid material and liquid samples. When determining solid content, procedurile și standardele de operare corespunzătoare trebuie urmate pentru a asigura acuratețea și repetabilitatea rezultatelor măsurătorilor.