Analytik Jena GmbH - mercur Duo plus – Combined AAS/AFS spectrometer for mercury determination

Fully automatic and reliable Hg ultra trace analysis

The mercur DUO plus offers a very simple, robust and cost-effective method for the determination of mercury traces in liquid samples. It combines the proven cold vapor technique with optical spectroscopy methods, such as atomic absorption spectroscopy (AAS) and atomic fluorescence spectroscopy (AFS). In the cold vapor technique, mercury compounds are reduced to atomic mercury by chemical reaction with a reducing agent such as tin (II) chloride or sodium borohydride. This basic principle is implemented in the mercur DUO plus using a fully automated and time-controlled flow injection technique. Automated processes like dosing of reagents and sample solutions as well as rinsing of tubing enable simple and efficient operation with low chemical consumption and short measuring times.

The detection of the atomic mercury is carried out either by robust AAS or the highly sensitive AFS with detection limits down to the ppq range. Additional enrichment is achieved by passing the atomic mercury over an additional gold collector. This double amalgamation increases the detectability of the mercury and guarantees standard-compliant operation (according to EPA Method 1631).

Ease of use and automation are key features of the mercur Duo Plus. Relaible and low-maintenance routine analysis of even complex samples is guaranteed by technical details, like a bubble sensor, a specially optimized drying membrane and an intelligent gas-liquid control. The manual version of the mercur DUO plus for small sample numbers can be expanded with the AS-F or AS-FD autosamplers with dilution function for maximum sample throughput.