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

Quimica nova

Bisinoti, Márcia Cristina¹  Jardim, Wilson F.²  Guimarães, Jean Remy³  Malm, Olaf³  Brito Júnior, José Lailson³ 

[1] Universidade Estadual Paulista, São José do Rio Preto, Brasil;Universidade Estadual de Campinas, Campinas, Brasil;Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brasil

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 fromwater and sediment samples, using methylene chloride in acidic media followedby CVAFS quantification has been developed. The method was evaluated for possibleinterferents, using different inorganic mercury species and humic acid, no effectsbeing observed. The detection limit for organic mercury was 160 pg and 396 pgfor water and sediment samples respectively. The accuracy of the method wasevaluated using a certified reference material of methylmercury (BCR-580, estuarinesediment). Recovery tests using methylmercury as surrogate spiked with 1.0 upto 30.0 ng L-1 ranged from 90 up to 109% for water samples, whereasfor sediments, recoveries ranged from 57 up to 97%.

【 授权许可】

CC BY