Science Fair help

[Experiment]

hello, I'am in high school and doing a science fair project on chemicals and heavy metals found in both natural water sources and bottled water. I'am looking to see if any one has any information on this topic, preferably a list of chemicals or heavy metals found in either bottled water or natural water sources. Any reply is greatly appreciated.

[smhjn17]

Traces of arsenic, lead, nickel, cadmium I suppose as heavy metals.

Then some vital ions like fe3+, cl-, ca2+,etc, can be present in natural water.

But how are you going to detrct such trace quantities?

[Sensei]

Traces of arsenic, lead, nickel, cadmium I suppose as heavy metals.

Then some vital ions like fe3+, cl-, ca2+,etc, can be present in natural water.

But how are you going to detrct such trace quantities?

 

f.e. distillation, good for molecules that have significantly higher boiling temperature than water,

boil 1 L of water, until there is 50 mL remaining,

Repeat it 20 times, so again you have 1 L of water, but concentration of contamination is 20 times higher.

If you will repeat it again, you have concentration of contamination 400 times higher than at the beginning.

Edited December 29, 2015 by Sensei

[Experiment]

Thank you so much for your responses