ASTM D5854 practice for mixing and handling of petroleum and petroleum products
ASTM D5854 standard practice for mixing and handling of liquid samples of petroleum and petroleum products
9. Selection of Sample Mixing Method
9.1 Table 1 lists the recommended mixing procedure to be used before a sample is transferred from a container. The degree of mixing depends on the type of transfer being made, the analytical test to be conducted and the characteristics of the sample. General guidelines are given in 9.1.1-9.1.3.
9.1.1 Power mixing is required for all crude oil samples to be tested for sediment and water or density. Power mixing is also required when the sample has been transported or stored in either a primary or intermediate container.
9.1.2 No mixing is required if a crude oil sample is transferred from the extracting device to the analytical test device at the time of extraction. However, when such a sample is stored or transported in the extracting device, mixing is required.
9.1.3 Unless the specific procedure prohibits shaking, all other samples should be shaken with the exception of those to be tested for vapor pressure and cloud point.
10. Keywords
10.1 crude petroleum sampling; liquid petroleum sampling; sample containers; sample handling; sample mixing; sample preparation; sampling validation
