I have a question about chemical analysis ICP sample preparation.

A 16g liquid sample was evaporated on a hot plate to obtain 0.9409g of salt.

Here, 4g of 2% HNO3 was added to completely dissolve the salt obtained from IPA, and analysis was performed.

At this time, the final concentration calculation must be multiplied by

Is the dilution factor 4.3042 correct? or is 0.2129 correct?

used to calculate

The density of the sample is 0.785g/ml

The density of 2% HNO3 is 1.01 g/ml.

Since the sample is reduced from 16 g to 0.8g, is 0.2129 correct considering the initial volume?

Or is 4.3042 correct by calculating the sample volume after digestion?