08/08/2015 The Project Gutenberg eBook of Elements of Chemistry, by Mr Lavoisier. 113/229 tartarite of soda, formerly called sal de Seignette , or sal polychrest of Rochell . S ECT . XXVII.— Observations upon Malic Acid, and its Combinations with the Salifiable Bases  . The malic acid exists ready formed in the sour juice of ripe and unripe apples, and many other fruits, and is obtained as follows: Saturate the juice of apples with potash or soda, and add a proper proportion of acetite of lead dissolved in water; a double decomposition takes place, the malic acid combines with the oxyd of lead and precipitates, being almost insoluble, and the acetite of potash or soda remains in the liquor. The malat of lead being separated by decantation, is washed with cold water, and some dilute sulphuric acid is added; this unites with the lead into an insoluble sulphat, and the malic acid remains free in the liquor.
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- Chemical elements, Malic acid