EPA Method 7474


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EPA Method 7474:
MERCURY IN SEDIMENT AND TISSUE SAMPLES BY ATOMIC FLUORESCENCE SPECTROMETRY

Summary:
A representative portion of sample is digested in a microwave unit using nitric and hydrochloric acids in a closed fluorocarbon container. The sample is digested under pressure to aid in the dissolution of organic compounds containing mercury.

Scope:
This method uses atomic fluorescence spectrometry to determine the RCRA analyte in sediment and tissue samples. The range of this method is from approximately 1 part per billion to the part per million range. Analysis of the entire range cannot be accomplished at once, but rather different portions of this range can be analyzed depending upon the instrument gain settings.

Report Number:
SW-846 Ch 3.3

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Examples:  8260
TO-15

Examples:  Dioxin
Mercury
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