[Rishi_Kant_NitB]

I am helping one senior teacher with his iron removal project, What we have to do is

1.) Make a Iron solution in water.
2.) Record concentration readings in Atomic Absorption Spectrometer
3.) Apply suitable Iron Removal techniques.
4.) Record concentration readings in Atomic Absorption Spectrometer.

I need help in making the Iron solution,
What is the best way to make a suitable iron solution,
availability and cost of Iron salt should be taken into consideration in deciding the salt.

I have found that Iron(II) chloride works well, but Iron(III) chlrodie and Mohr's salt also have been adviced for me to use.

Just let me know your views on making a solution of Iron, which salt should be used, Consider I have to make 1000 ppm of Iron solution.

[DevaDevil]

in pricing, Iron (III) chloride is the cheaper option

[Rishi_Kant_NitB]

can some one please tell me the best way of making a standard iron solution.

[DevaDevil]

best: buy standard solution

second best:
get any sufficiently pure iron salt, weigh the appropriate amount to dissolve in distilled water, add nitric acid if so required (AAS usually does require 2-5%)
recipies can be found here, see paragraph 5