Leeman Labs PS200II Mercury Analyzer
Overview-
As the name suggests, the Leeman Labs PS200II Mercury Analyzer is used to determine the concentration of mercury in a sample. The beginning oxidation state of the mercury isn't critical, and the method is remarkably free of interferences.
Theory -
Detection Limits -
The Detection Limit for the PS200 II is in the low parts-per-trillion range. With other analytical techniques, this might be problematic, as samples with higher mercury concentrations would need to be diluted to bring the analyte into the concentration range corresponding to a linear absorbance response. With the PS200 II, though, the amount of sample analyzed can be decreased, and/or the flow rate of the stripping gas can increased, decreasing the amount of ground state mercury ending up in the absorbance cell. This procedure allows mercury concentrations into the parts-per-million to be determined.
Sample Matrix -
The sample must be in a liquid matrix, prefferably aqueous. The sample should be free of particulates which might clog the sampling tubing.
Sample Size -
Typically, 2-3 mL of sample is required for each replicate analysis. Smaller sample sizes may be used, but the sensitivitymay be decreased.
Approximate C0st -
Neglecting the cost of sample preparation, the cost of the instrument is $XX.XX/hour.
Some Usefull Links -
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Some Usefull Methods -
- Standard Operating Procedure
- Microwave digestion of media
- Microwave digestion of filter paper