ASTM D2715 Test Method for Volatilization Rates of Lubricants in Vacuum
12. Report
12.1 For specimens of constant rate according to 11.1, the report shall consist of the evaporation rate per unit area for each temperature, plus a statement of any deviations in coherence of surface as in 7.3, or variation in chamber pressure beyond the limits in 9.3, or decomposition found in 9.10.
12.2 For specimens of variable rate according to 11.2, the report shall consist of the evaporation rate per unit area for each temperature at intervals of 5 % (based on the sample weight in 7.3) from the first obtainable one as far as the data go but not to exceed a running time of 3 h unless this is specifically required. Any deviations (see 12.1) are to be reported.
12.3 For specimens of variable rate, and such limited supply as to require reuse at another temperature, the report will contain the data which could be obtained. For example, such a report might indicate:
5 %, 10 % measured at 473 K,
15 %, 20 % measured at 498 K,
25 %, 30 %, 35 % measured at 523 K,
40 %, 45 %, 50 % remeasured at 498 K.
13. Precision and Bias
13.1 The data shown in Fig. 3 of the paper were used to prepare the following statement on Procedure A. Cooperative testing to prepare a statement on Procedure B is being planned.
13.1.1 Repeatability - Duplicate results by the same operator should be considered suspect if they differ by more than 45 % of their mean value (95 % confidence level).
13.1.2 Reproducibility - There is no immediate plan to determine the data necessary to develop the reproducibility statement.
13.2 Bias - No general statement is made on bias for this standard since the data used to determine the correlation cannot be compared with accepted reference material.
14. Keywords
14.1 lubricants; volatilization; volatilization rates
