ArticleAnalytical and bioanalytical chemistry2026
Molecularly imprinted dual-function ion source for direct and sensitive ambient mass spectrometric detection of trace vardenafil in medicinal liquor.
Article in Analytical and bioanalytical chemistry, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
Ambient ionization mass spectrometry (AMS) has emerged as a powerful technique for rapid chemical analysis by circumventing extensive sample pretreatment. However, the sensitive detection of trace illegal additives in complex food matrices remains challenging for AMS. Herein, a novel molecularly imprinted steel sheet (MISS) ion source is reported, synthesized via coating vardenafil (VAR) imprinted polymers onto a customized steel substrate. This MISS serves dual functions: acting as a solid-phase microextraction tip for rapid and selective enrichment of VAR from medicinal liquor samples, and as an ionization substrate facilitating electrospray ionization for direct AMS analysis. Extraction from liquor samples was completed within 20 min, followed by AMS detection in just 40 s. The MISS-AMS method exhibited excellent linearity over 0.2-200 μg L
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