Lemon is acidic
11/22/07 12:34 PM
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Syl
Reged: 03/13/05
Posts: 5499
Loc: SK, CANADA
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Lemons are acidic not alkaline. Lemon juice is about 5% acid, which gives lemons a tart taste, and a pH of 2 to 3; it is nearly as acidic as stomach acid. Lemon juice is used to adjust the pH of foods. For example, it is used to decrease the pH of tomotoes and salsa during the canning process to prevent the growth of micro-organisms.
The primary acid in lemons and limes is citric acid , an organic acid. It can account for up to 8% of the dry weight of these fruits.
Here are some generally accepted pH ranges for some foods
Alkaline Foods - pH above 7.0 - Eggs, soda crackers
Low Acid Foods - pH of 5.0-7.0 - Meat, fish, poultry, dairy
Medium Acid Foods - pH 4.5 - 5.0 - Soups, pasta, pimento
Acid Foods - pH 3.7 - 4.5 - Peaches, oranges, tomatoes
High Acid Foods - pH 2.3 - 3.7 - Lemons, pickled products
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