Maleic acid, also known as maleic acid, is mainly used in the manufacture of unsaturated polyester resins and the production of tartaric acid, fumaric acid, succinic acid, DL-malic acid, dyeing auxiliaries and oil preservatives and other compounds. It is also widely used in medicine, pesticides, food and other fields. At present, the main method for the determination of maleic acid is high performance liquid chromatography (HPLC), while the determination of maleic acid by ultraviolet spectrophotometry has not been reported.
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