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Abstract
This study reports a novel automated assay for the determination of N-acetylcysteine (NAC). The method is based upon the on-line derivatization of the analyte with a new reagent, ethyl-propiolate (EPL), to form a UV-absorbing derivative. The reaction is fast, proceeds in aqueous solutions under mild conditions and is, therefore, ideal for automation using sequential injection analysis. All major chemical and instrumental variables were examined thoroughly. The assay was validated for linearity, range, LOD-LOQ, within and day-to-day precision, selectivity, and accuracy. The experiments confirmed its suitability for the reliable quality control of NAC-containing formulations at a sampling rate of 80 h−1.
Published Version
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