I work in a public health laboratory in a small mining town and we have the chance to buy equipment to test for lead and cadmium in wastewater, and mercury in not just wastewater, but also in blood, hair and urine.
It is known that the only method to determine mercury in atomic absorption spectroscopy is the cold vapor method, and that there are specific instruments like this one, that can analyze mercury in all those types of samples (biological or water).
Is there any spectrometer that can be used to measure all three of these metals or do we need to buy one for mercury and another for the other metals?