Abstract
Three decomposition procedures for marine biological tissue samples were investigated for the subsequent determination of arsenic, selenium, and mercury by using hydride-generation and cold-vapor, AAS, respectively. (i) Decomposition with nitric acid under pressure in a PTFE bomb resulted in low values for arsenic and selenium but was adequate for the subsequent determination of mercury. (ii) Decomposition with nitric, sulfuric, and perchloric acids gave the highest values for arsenic and selenium, whereas mercury was partly lost under these conditions. (iii) Combustion in a stream of oxygen could be applied for all three elements and gave results that were in good agreement with the mean values of an intercalibration. Pressure decomposition with nitric acid is recommended for mercury, followed by a sulfuric and perchloric acids treatment for the subsequent determination of arsenic and selenium. Detection limits under routine conditions are 0.3 mg/kg for arsenic, 0.2 mg/kg for selenium, and 0.005 mg/kg for mercury. 29 references, 4 tables.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
