I assume your system is aqueous.  Thus 100 mL of water is 100 g. 1 ng is 10-6 mg or 10-9 g.  there are 10 X 100 mL ( = 100 g water) fractions in 1 L.  That is enough information for you to complete the problem.

I know that things Sir, but I want to know that whether ICPMS gives a result with consideration of weight was taken and volume made or not. I am attaching here 1 of the result

Hi Jitendra

You cannot convert the units, full stop

What you need is to use all the info you have

• Weight of your sample W
• Final volume of your sample (given any sample preparation like acid digestion) V
• concentration given by the icpms C

Final concentration X =(C*W)/V

Just check the units

Hello Jitendra,

if I understand correctly you are asking for conversion of concentration to the absolute quantity of mass. As Mr. Rawle pointed out in short, 1 ng/L means to find 10-6 mg of an element in the volume of 1 L. So, obviously in this case a volume of 100 mL will obviously contain 10-7 mg (I hope I made no mistake; and possibly Mr. Munoz annotations fit your question better). What is more irritating for me are the results displayed in the summary report. The report sheet insinuates that all results derive from just one measuring cycle, which means that all measured masses were run in one sweep (multiple repetitions). Measurement of such a quantity of different masses in one sweep is very uncommon and prone to unsatisfactory reproducibility (cf. RSD of signals). Also, displaying results of quite outstanding elements like Xe (and others) is somehow puzzling. In addition; what about displaying negative concentrations (e.g. Fe; Xe)? This is really puzzling and under these aspects I would recommend to send some critical queries to the data provider (which you possibly did already), before delving in further considerations.

Kind regards

D. Zachmann.