[fomerstudent15]

Hi,
can anyone help me find formula, which would correct ABV, that is measured by alcoholmeter, which is calibrated for 20°C, but the mixture has different temperature?

I want to implement this calculation into program so I can not use alcoholometric tables.

I know this formula for density of mixture at 20°C, can it help me?
http://imgur.com/CnP0COe

So e.g. I have measured 50%ABV at 10°C, tables would give me real ABV ==> 53,7%. Now I need to calculate this by formula. I will be very thankful for any help.

Thank you

[Borek]

I want to implement this calculation into program so I can not use alcoholometric tables.

Sure you can put tables into your program and interpolate between points.

[fomerstudent15]

I want to implement this calculation into program so I can not use alcoholometric tables.

Sure you can put tables into your program and interpolate between points.

Thanks for your answer.
Ok yes I can. But I don't like this too much, I mean if I cann't find the formula I will have to do that. But straight calculation would be more precise.
Here is a document that says (at page 5) table Vb gives alcoholic strength by volume as a function of density. Density is calculated with formula at page 12, but what would be that function of density?
Sorry I am not native english speaker and I may have overlooked something there.

Edit:
So table 5b is made by interpolation of tables 3a and 3b.
Table 3a is calculated from general formula so I know the specific number here.
Table 3b is calculated from formula q = (ρ₂₀/ρ_20(100%)) * p
and p is alcoholic strength by mass.
But alcoholic strength by mass should be in table 4b, but that table is created by interpolation of table 3b. So how can I find alcoholic strength by mass?

[Borek]

But straight calculation would be more precise.

You do realize these formulas are made by fitting some reasonably similar in shape function to the experimental data?

[fomerstudent15]

No I didn't. I didn't know if there is precise calculation or if it is based on empirical data. So best way is interpolation between already known values, am I right?

[Borek]

Either use tables and interpolation, or try to fit the data to your own function.

[fomerstudent15]

Thank you Borek, I will use tables and interpolate between values.