Calibration of carbon analyzer LECO type IR-212

Calibration of Carbon Analyzer LECO type IR-212 has been done. The aim of this research is to study the performance of the carbon analyzer LECO type IR-212 for its accuracy assurance. The experiment includes a series of performance adjustment using standard material traceable nationally/internationally. The standard material used for the calibration is standard carbon manufactured by LECO, which refers to National Institute of Standards and Technology (NIST) Standard Reference Materials (SRM) of traceable certificate. The method used is based on Application Bulletin Leco Corporation. The composition used for the experiment varies from 0,0097% to 0,8110% that is 0,0097 ± 0,0014%; 0,0348 ± 0,0013%; 0,1770 ± 0,003% and 0,8110 ± 0,007%. The analysis results for those varied composition are 0,0097 ± 0,000175%; 0,03474 ± 0,000152%; 0,1762 ± 0,00228% and 0,80982 ± 0,000958% for their mean value and standard deviation respectively. In the standard analysis, the results are close to the true value is the measurement of a standard sample with a content of 0.811% with a correction factor of 1.0015. The smallest standard deviation in measurements of 0,0348% sample gives the lowest standard deviation, i.e. 0,000152. The analysis results are considered sufficiently stable with linear calibration curve of y = 0.9984 x with correlation coefficient R² = 1. (author)