Digestion of Fish Samples for Mercury Analysis with PDC

Multiwave 7000 with its PDC (Pressurized Digestion Cavity) offers the opportunity to digest any kind of fish sample for subsequent mercury analysis even within one run.

1 Introduction

Mercury concentration in fish is a major concern for food safety. Therefore, fish samples have to be monitored for mercury on a routine basis all over the world.

However, mercury analysis holds some known challenges, like the volatility of mercury as an element and the even higher volatility of some mercury-organic compounds (i.e. Methyl-Hg). Another well-known issue is the property of mercury complexes to be adsorbed to polymer surfaces thus making quartz a favorable material for digestion, but also requiring preventive measures on the sample introduction path as not to bias the mercury values due to adsorption and cross contamination.

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