Environmental Laboratory

  • 5 Good Reason to Choose Direct Mercury Analysis

5 Good Reason to Choose Direct Mercury Analysis

Oct 28 2020 Read 639 Times

01 - No Sample Preparation Needed

The challenges in mercury determination are well known to analysts who often face a number of issues connected with tedious sample preparation process or the mercury analysis steps causing memory effect even after long cleaning cycles performed using latest generation of ICP-MS or cold vapor systems. The Direct Mercury Analyser is capable to analyse any matrix (solid, liquid or gas) without any pre-treatment or chemical additions in as few as 6 minutes in full compliance with EPA method 7473 and ASTM standards.

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02 - One calibration for any matrices

The sample combustion and the composition of the catalyst and amalgamator completeley removed the matrix effect. A single calibration, done with liquid or solid references materials, suits all wide variety of samples, over a wide concentration range: from ppt to ppm. The stability of the system and the long lifetime of the catalyst tube and gold amalgamator allow to use the calibration for long time and to eliminate daily calibrations often required by conventional instrumentation.

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03 - No memory effect

Mercury carry over is a common challenge in mercury analysis, the ability of the system to quickly clean the lines is combined with Autoblank feature. This, eliminates overestimation and ensures low blanks, thus enhancing user confidence in the data collected, while still ensuring high productivity and the use of the 40 positions autosampler.

04 - Superior Performance even at low mercury concentrations

The adoption of the double beam technology in the Direct Mercury Analyser increase the signal-to-noise ratio, and improve the quantification limit, enancing reproducibility and reliability of analysis even at low concentrations.

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05 - Fast and complete mercury determination

The process consists in weighing the samples in boats and place them into the autosampler suiatable for solid, liquid and gas samples (trough sorbent traps). Once the sample enter the furnace the drying and combustion takes place, then mercury goes through the catalyst and amalgamator. The performances of the catalyst tube and gold amalgamator enables full mercury conversion, interference removal, and fast mercury release. These components allow the Direct Mercury Analyser to deliver accurate results in a single measurement and in as few as 6 minutes. Method development and sample preparation are unnecessary, matching the turaround time and thoughput requirements of  many laboratories.

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