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037 ppm. Furthermore, we demonstrate that this assay is reliable and practical for detection of NH4+ and NH3 in real water and air samples with good accuracy.Herbal medicines have historically been practiced in combinatorial way, which achieves therapeutic efficacy by integrative effects of multi-components. Thus, the accurate and precise measurement of multi bioactive components in matrices is inalienable to understanding the metabolism and disposition of herbal medicines. In this study, aiming to provide a strategy that improves analyt