ASTM E562-19 is a standard practice that provides guidelines for stratified sampling of the environment. The standard practice is significant because it helps ensure that environmental sampling is conducted in a statistically valid and reliable manner. By following the guidelines outlined in ASTM E562-19, environmental professionals can increase sampling efficiency, improve data quality, and reduce uncertainty associated with environmental sampling.
: It is considered more efficient and less biased than other manual methods like lineal intercept or area measurement.
: Enables researchers and quality control labs to verify material properties, such as the volumetric content of sigma phase after heat treatment, which is critical for assessing corrosion resistance.
Many labs use E562-19 as the "ground truth" to validate their automated systems.
The implementation of ASTM E562:19 involves a systematic approach to point counting. Key steps include:
The ASTM E562-19 PDF document likely includes the following sections:
: Points falling entirely within a phase count as 1.0 ; points on a boundary count as 0.5 .