Plasma Chemistry Laboratory

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Notes on ICP-MS and ICP-OES Samples Prepared by Customer

  • We are more than happy to analyze samples that have been prepared in your lab. However, you must provide details on the sample and the sample matrix.

     

  • If we determine your samples are in a high concentration acid or base, we will automatically dilute your samples to an appropriate 2-5% HNO3 or HCL matrix and will assess dilution fees. It is never acceptable to submit high concentration acids without informing us on the sample submission form as this may damage our instruments. Do not send samples in a HF matrix!

     

  • If your sample contains visible pariculates, we will automatically filter the sample and assess filtration fees.

     

  • If you send samples for ICP-MS analysis and the analytes are outside of the accepted range for the instrument, we will dilute your samples and assess dilution fees.

     

  • If you fail to inform us of any unusually high concentration analytes or metals (this especially applies to ICP-MS) in your sample, you may be assessed "clean up" fees depending on the severity of damage to the instrument.

     

  • When in doubt, contact us; we are here to help out.

 

ICP-MS and ICP-OES Sample Preparation

Plant Tissue Preparation

  • Dry ash method - 0.5 gm of dried ground plant tissue is ashed in a porcelain crucible at 500°C for 4 hours and cooled. 10 ml of a plant buffer solution is added and allowed to settle before analysis. The 965 ICP is set up with a 20 element program for plants. NIST plant standards (apple leaves, pine needles) are used to confirm the proper calibration for this matrix. $20.00/spl

  • Wet digest - 1-2 gm of dried ground plant tissue is placed into an acid washed erlinmeyer flask and 10 ml of nitric acid is added. The flask is covered with a watch glass and allowed to sit overnight. On a 90°C hot plate, nitric and hydrochloric acid are added to digest the plant tissue. $50.00/spl

Soil Preparation

  • Double Acid Extraction - 5 gm of air dried 10-20 mesh soil is placed into a polypropylene tube with 20 ml of a dilute HCl and H2SO4 solution. Tubes are placed in a shaker for 5 minutes and then filtered. $20.00/spl

  • EPA method 3050 - 1-2 gm of dried 10-20 mesh soil is placed into a conical beaker and 10 ml of 50% nitric acid is added. The sample is covered with a watch glass, heated to 90°C on a hot plate, refluxed for 10 minutes (repeated if necessary), evaporated to 5 ml, and cooled. H2O2 and HCl is added and refluxed for 15 additional minutes and the sample is filtered or allowed to settle. $50.00/spl

Water Preparation

  • EPA method 3010 - 100 ml of sample is poured into a clean beaker and 3 ml of nitric acid is added. The solution is covered with a watch glass, placed on a hot plate, and refluxed at 90°C until it evaporates to ~5 ml.  An additional 3 ml of nitric acid is added, refluxed for 10 minutes, and cooled. 10 ml of 50% HCl is added and refluxed for 15 minutes, cooled, then the volume is adjusted back to 100 ml. $50.00/spl

Bone Digest

  • Dry bone sample (1-2 gm if possible) is placed in an oven at 80°C overnight. The bone is muffled in a clean 200 ml beaker at 500°C for 4 hours, 5 ml of aqua regia is added, and the beaker covered with a watch glass heated on hot plate at 90°C until dry. 100 ml of the plant buffer solution is added and then analyzed. $50.00/spl

Peanut Digest

  • Dry peanuts are finely chopped and then 0.5 gm is weighed and placed into a 20 ml vial or beaker and ashed for 8 hours at 500°C. This is then cooled, 4-8 drops of concentrated nitric is added, and the sample is heated on a hot plate until almost dry. Samples are returned into the muffle furnace for 1 hour at 500°C until the ash is white, and 10 ml of the plant buffer solution is added and then analyzed. $50.00/spl

Additional Charges

  • Freeze drying samples........$3.00/sample
  • Drying and sieving............$20.00/sample
  • Dilutions for over range....$10.00/sample
  • Filtering samples...............$20.00/sample
  • Grinding up samples.........$20.00/sample
  • Priority RUSH analysis.....$20.00 extra/sample
  • Shipping back samples......$10.00/box of sample (U.S. ground mail)


For further information contact the CAIS Plasma Chemistry Laboratory (706) 542-1395 icpms@uga.edu