concentration of metals in locally grown and organic vegetables
DESCRIPTION
Concentration of metals in locally grown and organic vegetables . By: Stephani Lane & Aaron Pyle. Purpose . To determine metal concentration differences between organic and locally grown vegetables for healthy dietary decisions. . Overview Our Experiment . - PowerPoint PPT PresentationTRANSCRIPT
Concentration of metals in locally grown and organic vegetables By: Stephani Lane & Aaron Pyle
Purpose •To determine metal concentration
differences between organic and locally grown vegetables for healthy dietary decisions.
Overview Our Experiment •Researched vegetables and metals to test•Determined expected amount of each
metal •Purchased vegetables from a local store •Blended vegetables •Made 10, 20, 30, 40 and 50 ppm
standards •Ran experiment on the ICP
Vegetables
Vegetables
Metals •Calcium •Lead•Magnesium •Manganese •Sodium
Metal Benefits •Ca- Strong bones, dental care, prevents
colon cancer, reduces obesity•Pb- none•Mg- prevent cardio vascular disease,
regulates blood pressure, muscle and nerve function
•Mn- forming bones and enzymes, helps absorb vitamins, healthy function of the brain
•Na- maintains fluid balance, maintains healthy heart, eliminates excess CO2
Metal Detriments •Ca- heighten blood pressure, risk of
cardio vascular disease, kidney stones•Pb- Headaches, joint pain, fatigue,
miscarriages •Mg- Nausea, low blood pressure,
irregular heart beat•Mn- Chronic liver disease, psychosis,
shaking •Na- high blood pressure, kidney disease,
osteoporosis
Method•Weighed out approximately 34 g•Blended each sample with 50 mL of water
(100 mL for Broccoli) •Filtered samples through a Buchner
funnel •Ran standards •Ran samples
Standard Curves Concentration v.s Intensity for Calcium
0 10 20 30 40 50 600
4000
8000
12000
16000
20000y=286.9x+300.6R2=0.9987
ppm
Inte
nsity
Concentration v.s Intensity Lead
0 10 20 30 40 50 600
2000
4000
6000
8000
10000y=179.9x-598.7R2= 0.9934
ppm
Inte
nsity
Concentration v.s Intensity for Manganese
0 10 20 30 40 50 600
500000
1000000
1.5100 6
y=22469x+37597R2=0.9995
ppm
Inte
nsity
Results •Calcium
Vegetables Locally Grown(ppm)
Organic(ppm)
Potato 78.78 102.78
Zucchini 192.93 599.45
Beets 63.77 123.16
Broccoli 342.44 224.11
Results•Manganese
Vegetables Locally Grown
(ppm)
Organic
(ppm)
Potato 0.0052 0.1409
Zucchini -0.342 -0.405
Beets -0.5489 2.74
Broccoli -1.38 -0.707
Results •Lead
Vegetables Locally Grown
(ppm)
Organic
(ppm)
Potato 3.92 4.43
Zucchini 3.798 3.82
Beets 6.92 6.11
Broccoli 3.46 3.67
Results •Sodium
Vegetables Locally Grown
(ppm)
Organic
(ppm)
Potato 27.13 90.29
Zucchini 8.31 22.41
Beets 517.97 641.52
Broccoli 153.58 82.45
Results •Magnesium
Vegetables Locally Grown
(ppm)
Organic
(ppm)Potato 197.75 192.84
Zucchini 154.10 203.71
Beets 167.99 244.54
Broccoli 160.97 112.24
Conclusions•Mn found only in organic beets•Broccoli had lower organic
concentrations, except for lead • Beets had higher organic concentrations,
except for lead •Organic zucchini and potato's were higher
in all categories
Conclusion •Based on our data, a healthier dietary
decision can be made concerning metal content.
Sources • http://ods.od.nih.gov/factsheets/Calcium-
HealthProfessional/• http://www.fitday.com/fitness-articles/nutrition/
healthy-eating/4-signs-youre-getting-too-much-sodium.html
• http://ods.od.nih.gov/factsheets/Magnesium-HealthProfessional/
• http://www.webmd.com/vitamins-supplements/ingredientmono-182-MANGANESE.aspx?activeIngredientId=182&activeIngredientName=MANGANESE