Table 6: Comparison and practical considerations for using Hydra C versus ICP-MS.

Hydra CICP-MS

No Sample digestion
(lower cost per analysis)
Need sample digestion
No Hazardous chemical or wasteHazardous chemical or waste
All of the Hg in each sample is collected on the amalgam prior to analysisHg can be lost from aqueous samples during digestion
About 5 minutes/sampleAbout 30 min/sample
All the Hg gets to the detector, so sensitivity is good.ICP-MS system must provide very high sensitivity to compensate for Hg low degree of ionization in the plasma
Decrease the chance of contaminationChance of contamination during the digestion process
No carry over effect or loss of sample (no tubing required)Significant carry over effect and loss of sample via tubing.