AN INTERNATIONAL INTERCOMPARISON EXERCISE FOR TOTAL MERCURY IN SEAWATER

被引：15

作者：

COSSA, D

COURAU, P

机构：

[1] Centre Champlain Des Sciences de la Mer, Ministère Des Pêches Et Des Océans, Québec

[2] Laboratoire de Physique et Chimie Marines, Université P. et M. Curie, Villefranche-Sur-Mer

[3] Institut Francais de Recherche pour l'Exploitation de la Mer, Centre de Nantes, Nantes, F. 44037

来源：

APPLIED ORGANOMETALLIC CHEMISTRY | 1990年 / 4卷 / 01期

关键词：

analysis; Intercomparison; mercury; methyl mercury; seawater;

D O I：

10.1002/aoc.590040109

中图分类号：

O69 [应用化学];

学科分类号：

081704 ;

摘要：

Two 30 dm3 coastal seawater samples were collected in September 1983. One was acidified, homogenized and divided among 50 500‐cm3 glass ampoules. The second was spiked with 612ng of mercury added as methylmercury chloride, acidified, homogenized and divided among 50 500‐cm3 glass ampoules. All these operations were performed under a mercury‐free atmosphere. A single sample from each set was sent to each of 37 laboratories; 21 of them submitted their results of a ‘total’ mercury concentation determination. The consensus values and their confidence limits are 6.0 ± 1.6 and 24.2 ± 2.8 ng dm−3 for the natural and the spiked samples respectively. Eleven laboratories reported reliable quantitative results (within ± 2SD) for the natural (unspiked) sample, and 12 for the spiked sample. In addition, ten laboratories give sets of results within ± 2SD of the consensus values. Storage for up to four months of methylmercury spiked samples with 1.4% nitric acid (0.3 mol dm−3) at room temperature is, alone, an unsuitable treatment for releasing mercury from its monomethyl compounds. Copyright © 1990 John Wiley & Sons Ltd.

引用

页码：49 / 54

页数：6