Abstract
A stable isotope dilution procedure in conjunction with the spark source mass spectrograph was developed for determining sub-μg g -1 concentrations of mercury in orchard leaves. A 5-g sample was spiked with a solution of mercury, isotopically enriched in 201Hg and 198Hg. The 198Hg served as a carrier. After wet-ashing the sample with nitric and perchloric acids under reflux and distilling most of the acid, the isotopically equilibrated mercury was electrodeposited onto high-purity gold wires for sparking in the mass spectrograph. The concentration was calculated from the altered isotope ratio, 201Hg/ 202Hg, and other data. The results were compared with those obtained by atomic absorption spectrometry and neutron activation, leading to a certified value of 0.155 ± 0.015 μg g -1 for the mercury content of Orchard Leaves, SRM 1571 of the National Bureau of Standards.
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.
