How do you convert ratios to ppm?

Answer 1

If you have a ratio (A/B) ... (you know the numbers 'A' and 'B') ... write the equation

x / 1,000,000 = A/B

and solve it for 'x'. 'x' is the ppm. Here's what the solution looks like:

Multiply each side by 1 million:

x = 1,000,000 A / B

and there you have it.