All varieties of salsa without added lemon juice tested above 4.6 and at a risk for botulism. This research explains why an acid must be added to tomatoes when home canning them to lower the pH and ...
Process in a boiling water bath Add lemon juice or citric acid to all tomato and fig products Add 1 TBSP boiled lemon juice to a pint, or 2 TBSP to a quart ...