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Metal Determination in Vegetables

Metal Determination in Vegetables. Tim Cumming Jesse Diehl Meg Dailey. Why eat vegetables?. Rich in vitamins and minerals Nutritious Fiber May reduce the risk of diseases, including heart disease and high blood pressure Help you feel energized and healthy. Our Project.

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Metal Determination in Vegetables

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  1. Metal Determination in Vegetables Tim Cumming Jesse Diehl Meg Dailey

  2. Why eat vegetables? • Rich in vitamins and minerals • Nutritious • Fiber • May reduce the risk of diseases, including heart disease and high blood pressure • Help you feel energized and healthy

  3. Our Project • We were looking for minerals in vegetables, both frozen and organic • The vegetables we looked at were; cauliflower, broccoli, carrots, green beans and spinach • We were expecting to find Fe • What we found was Ca, K, Ag, Fe and Cu

  4. How did we go about this? • Determine what vegetables to test • Run samples on the XRF • Determine what elements to look for on the ICP • Turn the vegetables into liquid • Run standard and samples on the ICP

  5. The XRF and the ICP

  6. XRF Data Sample

  7. XRF Data Analysis • Only found Fe in the spinach • Vegetables mostly contained Ca, K, and Cu • Kept Fe because it was what we were originally looking for • Ag was found in the carrots and the frozen spinach • Curious, we decided to look for Ag, too

  8. ICP • Decided to make standard of 0.1, 0.5, 2.0, 4.0, 6.0, 8.0, and 10.0 ppm • Standards contained Ag, Fe, Cu, Ca, and K • Standards were made from 1000 ppm standard metal solutions • Vegetable samples were made from 10 mL of filtered sample diluted to 100 mL with distilled water

  9. ICP Standard Data

  10. ICP Standard Data

  11. ICP Standard Data

  12. ICP Standard Data

  13. ICP Standard Data

  14. ICP Sample Data

  15. ICP Data Analysis • All vegetables showed trace amounts of Ag, Cu, and Fe • Organic carrots showed the highest concentration of Fe, K, and Ca • Frozen broccoli showed the highest concentration of Ag • Frozen broccoli, spinach, and green beans showed higher concentrations of Ca and K

  16. Overall Analysis • Believe that the silver was from pesticides • What vegetable depends on whether organic is better than frozen

  17. Benefits of Metals • Calcium is needed for healthy bones, healthy teeth, and functioning of nerves, glands, and muscles • Iron is needed for healthy blood and functioning of cells • Potassium is needed to maintain healthy blood pressure

  18. Sources • http://www.fruitsandveggiesmorematters.org/top-10-reasons-to-eat-more-fruits-and-vegetables • http://www.fruitsandveggiesmorematters.org/key-nutrients-in-fruits-and-vegetables • http://www.epa.gov/oppsrrd1/REDs/old_reds/silver.pdf • http://www.epa.gov/opp00001/biopesticides/ingredients/factsheets/factsheet_072503.htm

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