Specific Gravity & Density Determination
Specific gravity and density testing is often used for quality control measures.
About Specific Gravity & Density Determiniation
Specific Gravity is a measure of the ratio of the mass of a given volume of material at 23 °C to the same volume of water. Density, a closely related measurement, is defined as the mass per unit volume of a sample.
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Approaches
Specific Gravity and Density tests can be used to identify a material or to follow physical changes in a sample.
Specific Gravity and Density tests can also be used to indicate the degree of uniformity or variability among different sampling units or specimens, or to indicate the average density of a large item.
ASTM Standards:
- D1475
- D792
- D1505
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Sample Considerations
The sample needs to be roughly a cubic centimeter in volume.
The sample does not necessarily need to be in one solid piece, for example, pellets adding up to a cubic centimeter could be used.
Specific Gravity and/or Density testing can be performed on liquid and solid samples in forms such as:
- Sheets
- Rods
- Tubes
- Films
- Molded Items
Contact us with your specific sample consideration questions.
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Experience
Specific Gravity and Density testing is often used for quality control measures. We have done a lot of analysis involving:
- Screening for contaminants
- Comparisons of "good" and "bad" samples
- Batch to batch control
- Quality control assurance testing