Vaino Indongo

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Questions related from Vaino Indongo

How do we calculate the correct activity concentration for K-40 given the concentration of 201 ppm from ICP-MS?

A soil sample prepared well, digested and measured with all dilution factors included/incorporated during measurement gave a concentration of 201 ppm. The natural abundance for K-40 is 0.0117% and...

29 June 2021 2,785 0 View

Can ICP-MS samples prepared in year 2019 give the same concentrations if the are re-analysed in 2021?

Samples were prepared in 2019 as follows. Each soil sample prepared of mass approximately equal to 0.500g was a added to 9ml of HCL (35-37%) and 3ml of HNO3 (70%). The samples were digested....

12 March 2021 4,303 9 View

Is it possible that one would compute activity concentration for K-40 from ICP-MS TotalQuant analysis without collision reaction cell mode setting?

An interesting situation emerged on analysis of ICP-MS samples which had to be compared with gamma spectroscopy results. For other radionuclides activity concentrations, such as U-238 and Th-232...

20 November 2020 4,201 2 View

How do I calculate the dilution factor and convert ICP-MS results in ppb to mg/kg? Just formula will do. What should I do?

I prepared samples for ICP-MS analysis. During digestion I mixed about 0.5 g of soil samples and final solution has a volume of 50 ml. Now, the solution was still concentrated according to...

12 November 2020 2,231 7 View