Chemical profiling and comparative analysis of different parts of Asarum heterotropoides using SPME-GC-QTOF-MS and LC- Orbitrap -MS

Abstract

Asari radix et rhizoma is the sole plant from the Aristolochiaceae family officially sanctioned for medicinal in China, primarily employed for treating colds and headaches, and is widely utilized in clinical practice. Initially, the entire plant was specified for medicinal use, but since 2005, the authorized part has been restricted to the roots and rhizomes. The chemical constituents are directly linked to its efficacy and safety, yet a comparative analysis of the chemical profiles between the overground and underground parts has not been reported. This paper represents the first comparative study of the chemical constituents in the two parts, achieved through the synergistic application of solid phase micro extraction coupled with gas chromatography mass spectrometry (SPME-GC-MS) and liquid chromatography Orbitrap MS (LC-Orbitrap-MS). Using SPME-GC-MS, 51 constituents were identified from both parts, with 89 % being shared components, indicating a close similarity in their volatile compositions. Through LC-Orbitrap-MS, 308 constituents were identified, sharing 76 % commonality, revealing a more pronounced disparity in non-volatile components. Plant metabolomics screening pinpointed 8 volatile and 14 non-volatile components capable of distinguishing the two parts, with the latter being more stable and thus better suited as markers for differentiation. This research furnishes a scientific rationale for selecting distinct parts of Asari radix et rhizoma and for implementing monitoring strategies in clinical application.