In Part 1 of this series, sample collection, container types, and preservation techniques for low-level total mercury (Hg) analysis were discussed. In Part 2, I will highlight contamination sources from chemicals and the potential for analyte loss associated with digestion protocols.
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Mercury (Hg) determination at the ultra-trace level is an essential part of environmental assessment and drinking water monitoring. But this type of analysis comes with distinct challenges.
Read MoreTags: Hg analysis, low level mercury, mercury, mercury analysis, Determination of Trace Elements
Analytical techniques for measuring mercury include cold vapor atomic absorption spectroscopy (CVAA), cold vapor atomic fluorescence spectroscopy (CVAF), and direct analysis by thermal decomposition. Each technique has advantages and disadvantages, I'll review each technique and provide tips for choosing the right one for various situations.
Tags: CVAA, CVAF, Hg analysis, low level mercury, mercury, mercury analysis
Selecting the right Hg technique really depends on your analytical needs. For some labs, the decision will be driven solely by the need to comply with a specific regulatory method. For example, if your lab is required to analyze samples using EPA Method 245.1, then you will need to use the technique of cold vapor atomic absorption spectroscopy (CVAAS). If you are required to follow specific regulatory methods, you may find the following information helpful.
Tags: CVAA, CVAF, Hg analysis, low level mercury, mercury, mercury analysis, thermal decomposition