Neergeslagen bariumsulfaat is een anorganische verbinding in wit poeder, chemische formule is BaSO4, commonly used for preparation of barium salt, chemical reagents, verf, rubber, plastics and other fields.

Detectieprestaties
It has the characteristics of high density, hittebestendig, acid and alkali corrosion resistance, enz. In the application, the following properties need to be tested:

Deeltjesgrootteverdeling: the distribution of powder particle size directly affects its performance and use effect.

Particle shape: The shape of the particle has an important impact on the fluidity, dispersion and stability of the coating.

Specific surface area: It affects the chemical reaction rate, oppervlakte energie, bevochtigbaarheid, adhesion and other properties of the powder.

Sedimentation volume: reflects the density and sedimentation velocity of precipitated barium sulfate, which can indirectly reflect its particle size.

Samenvatting van de detectieprestaties van neergeslagen bariumsulfaat en de detectiemethode ervan

Volatile matter content: test its moisture content, impurity content, enz.

Acid soluble substance content: test its acid soluble substance content, which has an impact on the use scenario and quality requirements.

The above properties can be detected and analyzed by particle size meter, specific surface area meter, sedimentation volume meter, oven, acidity meter and other instruments and equipment.

Index van detectie
Precipitated barium sulfate is usually used as a white pigment or filler, and its performance testing needs to pay attention to the following aspects:

Samenvatting van de detectieprestaties van neergeslagen bariumsulfaat en de detectiemethode ervan

Detectiemethode
The specific detection method is as follows:

Chemical purity: By gravimetric method, the sample was added to barium nitrate to generate a precipitate, and then dried and weighed in an electric furnace to calculate the mass fraction of BaSO4 in the precipitate.

Physical Properties:

Deeltjesgrootteverdeling: laser particle size meter, electron microscope and other equipment were used to determine the particle size distribution of precipitated barium sulfate.

Specific surface area: The specific surface area of precipitated barium sulfate was determined by gas adsorption method (such as BET method).

Oil absorption value: According to ISO standard or national standard, the oil absorption value of precipitated barium sulfate was determined by cetyltrimethyl ammonium bromide solution immersion method.

Samenvatting van de detectieprestaties van neergeslagen bariumsulfaat en de detectiemethode ervan

Optische eigenschappen:

Powder brightness: Use reflective spectrometer and other instruments to measure the reflectance of precipitated barium sulfate and calculate the powder brightness.

Hiding power: The hiding power was evaluated by comparing the transmittance or transmissionability of the sample coated with precipitated barium sulfate with the standard sample.

Kleurverschil: The color parameters of precipitated barium sulfate, such as L*, a*, and b* values, are measured using devices such as a colorimeter or colorimeter.

Hoe te detecteren
Appearance detection: Observe the shape, maat, color and other characteristics of the sample by visual inspection or microscope.

Deeltjesgrootteverdeling: The average diameter, particle size distribution and other parameters of the particles in the sample are measured by particle size analyzer or microscope and other test instruments.

Samenvatting van de detectieprestaties van neergeslagen bariumsulfaat en de detectiemethode ervan

Purity test: Use chemical analysis methods or instruments to analyze the main components and impurities in the sample to determine the purity of the sample.

Specific surface area measurement: The specific surface area of the sample is measured by the specific surface area meter and other test instruments to evaluate the activity and reaction performance of the sample.

Solubility determination: The chemical properties of a sample are evaluated by observing its solubility at different temperatures.

Colorimetry: Use photometers and other instruments to determine the absorbance of the sample, so as to determine the chromaticity of the sample.

Densitometrie: The density of a sample is measured by a test instrument such as a densitometer to evaluate its physical properties.

Chemical stability determination: Chemical analysis methods or instruments are used to determine the chemical stability of the sample, so as to determine its stability under different conditions.