I did a lab on the colorimetric determination of iron concentration and I'm not sure how to convert fe conc into ppm. For example, how would i convert 0.6 ug/ml to ppm?
ppm is a weight/weight ratio problem. That is, weight of solute/weight of solution... I am assuming the 0.60ug is in water having a density of 1g/ml. (Sounds like you are running the FeSCN+2 Kc experiment). Anyways, given 0.60ug/ml = 0.6ug solute/1.0g solution = 6 x 10^-7g solute/1.0g Solution. By converting dimensions to same units one gets the ratio as the fractional ratio for solute in solution. Therefore for ppm, multiply ratio by 1 x 10^6. That is,
(6 x 10^-7/1)(1 x 10^6)ppm = 0.6ppm.
Converting solution concentrations to (gms solute/gms solution) gives a fractional wt/wt ratio that can be converted to % (parts per hundred), ppm or ppb by simply multiplying the ratio by 100 for %, 1-million for ppm, or 1-billion for ppb.
I understand it now, thank you so much!
A very easy way to do these ppm problem in water solution is to remember that 1 ppm = 1 mg/L or 1 ug/mL.
So 0.6 ug/mL = 0.6 ppm.
To convert the concentration of iron from micrograms per milliliter (μg/mL) to parts per million (ppm), you need to consider the conversion factor between these two units. The conversion factor is determined by the relationship between milligrams (mg) and grams (g), and then between milliliters (mL) and liters (L).
Here's how you can convert 0.6 μg/mL to ppm:
Step 1: Convert micrograms (μg) to milligrams (mg).
Since there are 1,000 micrograms in a milligram, you divide the value in micrograms by 1,000.
0.6 μg ÷ 1,000 = 0.0006 mg/mL.
Step 2: Convert milligrams per milliliter (mg/mL) to grams per liter (g/L).
To convert units of milligrams per milliliter to grams per liter, you need to multiply by 1,000.
0.0006 mg/mL × 1,000 = 0.6 g/L.
Step 3: Convert grams per liter (g/L) to parts per million (ppm).
Since there are 1,000 parts per million in 1 gram per liter, you multiply the value in grams per liter by 1,000.
0.6 g/L × 1,000 = 600 ppm.
So, 0.6 μg/mL is equivalent to 600 ppm.
Remember to always watch the units and use appropriate conversion factors to ensure accuracy in your calculations.