BS EN 14110 Fat and oil derivatives - Fatty Acid Methyl Esters (FAME) - Determination of methanol content
8 Precision
The precision data for procedure A and procedure B have both been obtained from a European interlaboratory trial organised in 1999. In this round robin exercise, no significant differences were observed between procedure A and procedure B (with automatic headspace system or with manual procedure) for the methanol concentration range of 0.01 % to 0.20 % (m/m).
8.1 Repeatability
The absolute difference between two independent single test results, obtained using the same method on identical test material in the same laboratory by the same operator using the same equipment within a short time interval, shall not be greater than:
r = 0.056X + 0.001
more than once out of 20 determinations (X being the mean of the two results in question).
8.2 Reproducibility
The absolute difference between two single test results, obtained using the same method on identical test material in different laboratories by different operators using different equipment, shall not be greater than:
R = 0.221X + 0.003
more than once out of 20 determinations (X being the mean of the two results in question).
9 Test report
The test report shall specify:
- all information necessary for the complete identification of the sample;
- the sampling method used if known;
- the test method used, with reference to this European standard;
- all operating details not specified in this European Standard, or regarded as optional, together with details of any incidents which may have influenced the test result(s);
- the test result(s) obtained, or if the repeatability has been checked, the final quoted result obtained.
