ASTM D1541 Test Method for Total Iodine Value of Drying Oils and Their Derivatives
9. Calculation and Report
9.1 Calculate the total iodine value, T, as follows:
T = [(B - V) x N x 12.69]/S
where:
B = Na2S2O3 solution required for titration of the blank, mL,
V = Na2S2O3 solution required for titration of the specimen, mL,
N = normality of the Na2S2O3 solution, and
S = specimen used, g.
9.2 Report the total iodine value to the first decimal place.
10. Precision and Bias
10.1 Repeatability - Two results obtained by the same operator should be considered suspect, at the 95 % confidence level, if they differ by more than 3.6 in iodine level (3.6 % absolute).
10.2 Reproducibility - Two results, each the mean of two determinations, obtained by operators in different laboratories should be considered suspect, at the 95 % confidence level, if they differ by more than 6.1 in iodine value (6.1 % absolute).
10.3 Bias - Bias has not been determined.
11. Keywords
11.1 drying oils; iodine value; iodine value-drying oils
