Question

How do you prepare 50ml of 3 ppm of Fe standart from 1000 ppm stock solution ?

Answer 1

Answer:

100 ppm of sodium in one liter would be 0.1 g of Na or 0.1 x 58.443 / 22.98 = 0.254 g of NaCl.

This may be tricky to weigh exactly and it would be better to weigh 2.54 g to make one liter at 1000 ppm of Na. When you have to use it, you dilute 10 times (take a 50 ml pipette and fill up to 500 ml with distilled water.)