Sorbate/Sulfite calculation

[SimonRamskov]

Hello,

I would like to get in touch with someone, who can help me figure out how much sorbate and sulfite to add to a bottle carbonated cider, which I am going to degorge and in the proces back sweeten with a fermentable sweetener.

Would anybody be so kind?

Best regards,

Simon

 

[Maylar]

What size bottle?

 

[SimonRamskov]

What size bottle?

Bottle size 0,75 litres.

 

[ebbelwoi]

Whoops, misread the original post. Can't seem to delete my original comment, so please disregard this post.

 

[RPh_Guy]

Shoot for 350-400ppm potassium sorbate (250-300ppm sorbic acid) and 20-30ppm free SO2 based on pH.

I can help with the calculations with more info.
I've never used this process; what's the usual volume added to the bottles after "disgorgement"?
What's the pH and did you already add and/or measure any sulfite before bottling?