ASTM D5808 Organic Chloride in Aromatic Hydrocarbons and Related Chemicals
ASTM D5808 Standard Test Method for Determining Organic Chloride in Aromatic Hydrocarbons and Related Chemicals by Microcoulometry
15. Report
15.1 Report the chloride results as (mg/kg) of the sample.
16. Precision and Bias
16.1 Precision - The results from six laboratories were used to generate statistical data. Three values were recorded for each sample. The standard used to calibrate a standard curve was provided with the samples and a volume of 40 µL was specified for all injections. For statistical calculations, the average value obtained on the neat (or blank) sample was subtracted from the average value for the 1 mg/kg, 5 mg/kg, and 25 mg/kg samples.
16.2 Intermediate Precision - Two successive test results generated by the same laboratory, on the same sample, by the same operator, with the same test equipment should not be considered suspect unless the difference is greater than 0.7 mg/kg, with 95 % confidence.
16.3 Reproducibility - Two tests generated in different laboratories, on the same sample, should not be considered suspect unless the difference is greater than 1.3 mg/kg, with 95 % confidence.
16.4 Bias - The results from the analysis by 6 different laboratories of gravimetrically prepared standard addition samples indicated that this procedure does not contain a measurable amount of bias nor systematic error that could contribute to a difference between a population mean and the accepted true value.
NOTE 3 - Although the data in this report was compiled using an automatic boat drive, direct needle injections with a constant rate injector have been found to give satisfactory results.
17. Keywords
17.1 density; electrolysis; electrolyte; microcoulometry; potential; pyrolysis; recovery factor; relative density; titration; total chloride; volatilization
