首页 | 本学科首页   官方微博 | 高级检索  
     检索      


Validation of methods for the determination of aluminium in fish gills by INAA and ICP-MS
Authors:K Heydorn  Z Alfassi  E Damsgaard  B Rietz  P Solgaard
Institution:(1) Isotope Division, Risø National Laboratory, DK-4000 Roskilde, Denmark;(2) Nuclear Engineering Department, Ben-Gurion University of the Negev, P.O. Box 653, 84 105 Beer-Sheva, Israel;(3) Chemistry Department, Risø National Laboratory, DK-4000 Roskilde, Denmark
Abstract:In a European study of fish death in mixing zones of rivers with different acidities a reliable determination of Al and other elements in gills from freshwater fish was required, and both INAA and ICP-MS were studied as candidate reference methods. INAA requires minimum sample handling with a correspondingly small risk of contamination and no blank value; however, a careful study was needed of both nuclear interference from P and the increased detection limit caused by other major elements in the sample, before reliable results for Al could be ascertained. ICP-MS requires dissolution of the sample with a resulting risk of contamination and a significant reagent blank; while sensitivity was good, the interference from N created problems for sample decomposition in the microwave oven. Our experience with actual samples indicates that both methods suffer from considerable contamination problems, requiring that samples be handled in a clean bench with superpure reagents. Nuclear interference was determined experimentally by irradiating stoichiometric P-compounds with and without a Cd-shield; the observed interference of 1 mgrg Al from 50 mg of P was found to require no correction in almost all cases. The accuracy of results was ascertained by analyzing SRM 1577 Bovine Liver.
Keywords:
本文献已被 SpringerLink 等数据库收录!
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号