Air Monitoring

Traceable calibration methods for oxidised mercury

Jul 04 2019

Author: Iris de Krom on behalf of VSL Dutch Metrology Institute

Free to read

This article has been unlocked and is ready to read.

Download

Because of its toxicity, regulations on the use and exposure limits for mercury are becoming even more stringent. For health and safety purposes, as well as for enforcement of regulations accurate measurements and hence calibrations are required. In recent years research has led to traceable calibration of elementary mercury (Hg0) concentrations, including the primary standard currently operational at VSL. However, mercury also occurs in oxidised forms (Hg2+) that are reactive and can be transformed into organic Hg species such as methylmercury (MeHg), which is very toxic and most prone to bioaccumulation in aquatic systems (Figure 1). Half of atmospheric mercury emissions are of natural origin whilst the rest are of anthropogenic sources, primarily from fossil fuel burning and other high-temperature industrial processes, such as cement clinker production, waste incineration, ore roasting and steel production. 


Digital Edition

Asian Environmental Technology November 2021

November 2021

In This Edition Business News - New joint venture to develop equipment and methods for fast molecular analyses - New gas detection partnership to protect endangered species - ION Science no...

View all digital editions

Events

EMEC21

Nov 30 2021 Novi Sad, Serbia

Lab Asia 2021 - POSTPONED TO 2022

Nov 30 2021 Virtual event

Biogas Convention 2021

Dec 07 2021 Nuremberg, Germany

SynGas 2021 - NEW DATES

Dec 13 2021 Baton Rouge, Louisiana

Safety in Action - POSTPONED, AWAITING NEW DATES

Dec 14 2021 Sydney, Australia

View all events