Phosphonate salts are the result of deprotonation of phosphonic acids, which are diprotic acids: Phosphonate esters are the result of condensation of phosphonic acids with alcohols. Several methods exist for the preparation of phosphonic acids and their salts.
1 Stir in the tomato sauce, tomato paste, vinegar, diced tomatoes, and brown sugar. Season with chili powder, Italian seasoning, and salt. Bring to a boil, reduce heat to low, and simmer 1 hour.  Mix the cornstarch and water, and stir into the salsa to thicken. Transfer salsa to sterilized jars, leaving 1/2 inch headroom, and seal. Process jars in a boiling water bath 15 minutes. Store unsealed jars in the refrigerator.
Transfer to a cutting board and loosely cover with foil. Let rest at least 15 minutes or up to 30 minutes. While the roast is cooking make the citrus sauce. Pour 1/3 cup of the Cuban Marinade, 3/4 cup orange juice, 1/4 cup lime juice and 1 teaspoon sugar into a saucepan.Bring to a boil, reduce the heat to maintain a simmer, and cook for 5 minutes.ransfer to a cutting board and loosely cover with foil. Let rest at least 15 minutes or up to 30 minutes. While the roast is cooking make the citrus sauce. Pour 1/3 cup of the Cuban Marinade, 3/4 cup orange juice, 1/4 cup lime juice and 1 teaspoon sugar into a saucepan.