| 摘要 |
An effervescent tablet is based on an effervescent system composed of carrier crystals of at least one solid, edible organic acid, of one or more components which form gas by reacting with the acid and producing salts, and of one or more salts produced from the acid and the gas-forming component. The carrier crystals are coated firstly with a layer of a different acid and secondly with a layer of a (preferably acid) salt derived from at least one of the two acids. Between ten and forty, and in particular between ten and twenty percent by weight of the total quantity of acids and gas-forming components used are in the form of the salts (preferably acidic salts). Carrier crystals consist in particular of zitric, malic, or tartaric acid, monosodium zitrate, and/or ascorbic acid. The first layer can contain d-gluconic acid-delta lactone and should be coated with zitric acid, malic acid and/or tartaric acid. This is covered with a layer of a monosalt formed by the reaction between part of the total quantity of gas-forming component and at least one of the acids used.
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