ASTM D2369:20 pdf free download – Standard Test Method for Volatile Content of Coatings.
9.4 Bias—Since there is no accepted standard for volatile content in coatings, bias cannot be determined.
9.5 Precision for Mu/ti-Component >90 % Solids Systems—The precision of this test was expanded to include data and analysis from Method E based on an interlaboratory study conducted in 2009. Each of eight laboratories tested five different materials, all multi-component, >90 % solids systems. Every test result” represents the mean of duplicate determinations. Every laboratory reported three replicate test results for the analysis. Practice E69 I was followed for the design and analysis of the data; the details are given in ASTM Research Report RR:D0l-l 152.x
9.5.1 Repeatability Limit (r)—Two test results, each the mean of duplicate determinations, obtained within one laboratory shall be judged not equivalent if they differ by more than the “f’ value for that material; “f’ is the interval representing the critical difference between two test results for the same material, obtained by the same operator using the same equipment on the same day in the same laboratory.
9.5.1.1 Repeatability limits for each of the materials tested are listed in Table 2.
9.5.2 Reproducibility Limit (RI—Two test results, each the mean of duplicate determinations, between different laboratories shall be judged not equivalent if they differ by more than the “R’ value for that material; “R’ is the interval representing the critical difference between two test results for the same material, obtained by different operators using different equipment in different laboratories.
9.5.2.1 Reproducibility limits for each of the materials tested are listed in Table 2.
9.5.3 The above terms (repeatability limit and reproducibility limit) are used as specified in Practice El 77.
9.5.4 Any judgment in accordance with statements 9•5 I and 9.5.2 would have an approximate 95 % probability of being correct.
9.5.5 The precision statement for Method E for Multi- Component, >90 % Solids Systems was determined through statistical examination of 120 reported results, from eight laboratories, on five materials, which were identifIed as:
A — Two component amine cured epoxy clear coating
13 Two component amine cured epoxy pigmented coating
C — Two component urethane pigmented coating
D-Two component urethane waterproofing membrane coating
E — Two component amine cured epoxy/acrylate highway marking coating
9.6 Bias—At the time of the study, there was no accepted reference material or method suitable for determining the bias for this test method, therefore no statement on bias is being made.
9.7 Precision for Diluent and Dry Methods—The precisior of this test was expanded based on an intcrlaboratory study conducted in 2015. Eleven coatings were analyzed for volatiles.