A novel approach to quantify organic mercury (organic Hg) by cold vapour atomic fluorescence spectroscopy (CVAFS)

Química Nova

Jardim, Wilson F.¹  Guimarães, Jean Remy¹  Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brasil¹  Malm, Olaf¹  Bisinoti, Márcia Cristina¹  Brito Júnior, José Lailson¹  Universidade Estadual Paulista, São José do Rio Preto, Brasil¹  Universidade Estadual de Campinas, Campinas, Brasil¹ 

关键词: methylmercury;    bromine chloride;    environmental samples.;   

DOI  :  10.1590/S0100-40422006000600004

学科分类：化学（综合）

来源: Sociedade Brasileira de Quimica

【 摘 要 】

In this work a simple and sensitive procedure to extract organic mercury from water and sediment samples, using methylene chloride in acidic media followed by CVAFS quantification has been developed. The method was evaluated for possible interferents, using different inorganic mercury species and humic acid, no effects being observed. The detection limit for organic mercury was 160 pg and 396 pg for water and sediment samples respectively. The accuracy of the method was evaluated using a certified reference material of methylmercury (BCR-580, estuarine sediment). Recovery tests using methylmercury as surrogate spiked with 1.0 up to 30.0 ng L-1 ranged from 90 up to 109% for water samples, whereas for sediments, recoveries ranged from 57 up to 97%.

【 授权许可】

Unknown