A: A batch is each mixture. For pickles, as an example, each pot of brine is considered a batch. Let’s say, you make a brine and add the brine to 9 pints of cucumbers. You seal the jar and process them in a boiling water canner for 15 minutes. This is one batch. Of the 9 pints, you would test the pH of 1 jar, 24 hours after canning it.
