GFAAS测定汞铅砷硒样品处理和基体改进的研究

STUDIES OF SAMPLE TREATMENT AND MATRIX MODIFICATION ON DETERMINE MERCURY LEAD ARSENIC SELENIUM BY GRAPHITE FURNACE ATOMIC ABSORPTION SPECTROMETRY

研究了各种无机和有机基体改进剂对消解与测定易挥发元素汞铅砷硒的稳定机理,讨论了氯化钯、硝酸钯、硝酸镍、镍(Ⅱ)盐或硝酸钯/硝酸镁等对汞铅砷硒的稳定效果。消解样品时加入的稳定剂可作为GFAAS法测定的基本改进剂。

In this article effects of various inorganic and organic matrix modifiers for the determination of Mercury Lead Arsenic Selenium was discussed. So that biological sample is digested, volatile elements of sample not lose in the generic beaker or Erlenmeyer flask. Stabilizer of volatile elements in the various biological sample was found. Mercury will be stabilized by use of palladium choride. Lead, Arsenicor Selenium by use of palladic nitrate, nickelous nitrate, nickelous(Ⅱ) or palladium-magnesium nitrate will be stabilized. Stabilizer is added into solution of the biological sample, it is digested with sample. Experimental result shows that, the recovery of the Mercury, Lead, Arsenic and Selenium was wt—97—103%. If stabilizer not is added into the solution of sample, recovery was wt—53—72%, volatile elements have been lost seriously.