Application of Certified Reference Material Oyster Tissue 1566b as Internal Quality Control to Determine of Total Lead in Marlin Fish Powder Using Electrothermal Atomic Absorption Spectrometry

Lead is widely knows as one of the harmful pollutants for humans. Contaminated fishery built by lead may endanger the consumption body. Therefore, contamination monitoring for the fishery products is necessary to be conducted. To ensure the validity of data, Oyster Tissue 1566b certified reference material was used as Internal Quality Control. Marlin fish powder and certified reference materials were analyzed with the same method, personnel, duration or time, equipment and environmental conditions. As the results, it was found that the lead contained in CRM was 0.306 mg.kg-1 with 11.9 % rsd, which is within range of lead content in the certificate. The method was applied for Marlin Fish. Lead content obtained in this study (1.821 mg.kg-1 with 11.06 % rsd) can be reported with high level of confidence.