Hi everyone,

I work at a factory plant where they use a mass balance.

The problem is that there is an huge difference between the input and output of one element. There are several people working on this problem but I focus more on the analytical side of the process.

The input is one product and the output consist of several different products

The concentration of each product is based on different analyses.

For example titration, gc analysis and a density measurement.

The results from all those different analysis are combined to calculate this mass balance.

Of course each analysis has its own uncertainty. And I want to combine each uncertainty into one combined uncertainty. Is it possible to use an simple formulae as shown in the file?

And is it possible to do this also for the measurement error?

Any advice on how to approach this would be very helpful.

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