9-Bromomethylacridine a Novel Fluorescent Labeling Reagent of Carboxylic Group for HPLC

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Abstract
9-Bromomethylacridine (9-Br · Ma) gave blue fluorescent 9-acridinylmethyl (9-AM) esters by the reaction with carboxylic acids. The reactions were performed simply by mixing the 9-Br · Ma, tetraethylammonium carbonate (TEA C) and carboxylic acids in N,N-dimethylformamide at room temperature. The 9-AM derivatives of fifteen kinds of fatty acids were separated and detected with high performance liquid chromatography. By this method, fatty acids could be determined at levels down to either pmol order by fluorometry or 10 pmol order by UV method. After saponification, those in triacylglycerols were also determined. When four kinds of fatty acids were added to a butter, their recoveries were 92–101%. The coefficient of variation of myristate as a representative was 2.5% (42.8 pmol, n=6).

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