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Coastal and Marine Geology Program
Woods Hole Field Center

Geochemical Sediment Analysis Procedures, Open-File Report 02-371

ACIDIFICATION STEP

ACIDIFICATION STEP
Materials Required:
  • 4oz. Specimen Containers
  • Centrifuge Tubes Containing Sediment
  • Concentrated Nitric Acid
  • Deionized Water (18.2 megohm - cm at 25°C) also called Milli-Q
  • Pipets - 10mL and 1mL
  • Plastic Scintillation Vials
 Acidification preparation materials; link to larger image

Label and fill each specimen container with 30mL of Milli-Q water using 10mL pipet.

*This step needs be done while the shaker bath is operating.

 Pipet 30 milli Liters water into container; link to larger image
Remove tubes from the centrifuge and pipet 3mL of the supernatant into the respective specimen container using a 1mL pipet. Pipet out 3 milli Liters of supernatent from tubes into container
Add 0.9mL of nitric acid to the specimen container using a 1mL pipet. Add nitric acid to container; link to larger image
Let the reaction take place for 5-12 hours. Reaction taking place in containers; link to larger image
Pour liquid into scintilation vials and place in the refrigerator until they are sent for *ICP-ES analysis.

*Inductively Coupled Plasma - Emission Spectrometry.		 Pour liquid into scintilation vials; link to larger image

 

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U.S. Department of the Interior, U.S. Geological Survey
URL: http://pubs.usgs.gov/of/2002/of02-371/METHODS/acidstep.htm
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Last modified: 13:21:36 Tue 19 Nov 2002
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