Might I introduce...

[TLServices]

...myself?

Potted history - spent 23+ years in brewing for a number of major brewers before deciding to leave before I achieved 'gold watch' territory!

It seemed like a good idea to work for myself so I put together my engineering and QA backgrounds to begin looking after brewing analytical kit, mainly dissolved gases (DO2, CO2, N2 being the usual suspects...) because...well...I seem to understand a bit!

Hopefully I learned a few things in those 23 years (and added to them in the last three) so if I can advise, help or otherwise comment on anything analytical do ask :thumb:

 

Hello TLS
Do you do anything with SO2?

 

[Tony]

NIce to meet you TL
:

 

[Samarith]

Welcome TLS, that's some impressive experience.

 

[31bb3]

Welcome to the forum :

 

[graysalchemy]

Welcome. I am sure plenty of us will appreciate your knowledge

:

AG

 

[TLServices]

Hello TLS
Do you do anything with SO2?

Hi - not a lot with instrumentation, but used to analyse SO2 levels regularly on cask beers. What would you like to know?

 

Hi - not a lot with instrumentation, but used to analyse SO2 levels regularly on cask beers. What would you like to know?

The normality of Iodine required to titrate a 10ml wine/cider sample with starch indicator and to multiply the mls of titre by 10 to give ppm/mg per litre SO2.
I think it's around the 0.004N mark.

 

[TLServices]

0.02N

There's a nice concise Ripper method here that might be useful to you:

http://www.vinquiry.com/pdf/so2freeripperQ.pdf

That uses a 25ml sample with 0.02N iodine then multiplies by 25.6, so if you're using a 10ml sample then the multiplier will be 10.2

Hope that helps!

 

[BarnsleyBrewer]

Welcome TLS, nice to have you on board! :thumb:

BB

 

[highwayman]

Ay Up TLS - Look forward to your inputs :clap:

 

There's a nice concise Ripper method here that might be useful to you:

I have a book with the Ripper method in it.
Many thanks