ii and less than 0 01 of the dimers iii were observed after being stored for a year to further stabilize the solution concentrates it is desirable to add acids or buffers to reduce the ph and thus lower the concentration of aggressive hydroxide anions the effect of a phosphoric acid additive was investigated as an example to test the assumption that adding an acid whose anion does not destabilize oxaliplatin to the oxaliplatin solution concentrates containing carbohydrate solutions as the solvent further reduces the decomposition of the agent the decomposition products of oxaliplatin solution concentrates c 10 mg ml with a ph adjusted with in phosphoric acid to 3 8 u00b1 0 2 were measured over time and quantitatively determined via hplc under the same conditions as those under table 6 the results are summarized in table 7 results summarized in table 7 indicate that the solution concentrates may be further stabilized via reduction of the ph by adding an acid whose anion does not destabilize oxaliplatin the experiments summarized in example 2 tables 5 7 clearly indicate that using carbohydrate solutions as the solvent in preparing oxaliplatin solution concentrates results in pharmaceutical preparations with long term stability furthermore using solvents according to the invention allows oxaliplatin solutions to be prepared in a particularly nondestructive manner finally adding acids that do not destabilize the agent oxaliplatin such as phosphoric acid or sulfuric acid also has a positive effect on the concentrates examples of oxalic acid solution concentrates according to the invention are summarized below having thus described the invention with reference to.