To convert ICP-MS counts per second (cps) to parts per billion (ppb), use a calibration curve to determine the sensitivity (cps/ppb) for each element and apply it to your sample data. Adjust for dilution factors and blank corrections to obtain accurate concentrations in the original sample.

To convert ICP-MS counts per second (CPS) to ppm or ppb, use the instrument's sensitivity (cps/ppm) to calculate concentration by dividing CPS by sensitivity. For ppb, multiply the ppm result by 1000, ensuring to account for any dilution factors and matrix effects.

For a solution, ppb is equivalent to µg/L. For a solid, ppb is µg/kg or ng/g for example.

If you have weighted your leaves and then got a solution, the calibration line will let you know the mass of element in the volume of the flask :

10 µg/L V = 100mL then it means 1 µg in the sample. Finally divide by the weight of the sample