Silver nanoparticles (AgNPs) loaded ammonium exchanged mordenite (NH₄M20) were found to be an efficient inorganic matrix (AgNPs-NH₄M20) to detect short n-alkanes, which are hardly ionized in conventional MALDI mass spectrometry. Silver ion adduct with alkanes, including n-heptadecane (C₁₇H₃₄), n-nonadecane (C₁₉H₄₀), n-tricosane (C₂₃H₄₈), n-tetracosane (C₂₄H₅₀), n-heptacosane (C₂₇H₅₆), allowing the analysis of short-chain n-alkanes by MALDI-TOF-MS. Zeolite as the supporter can enhance the peak intensity of Ag⁺ adducted n-alkanes by utilizing laser energy efficiently. The character of zeolite in AgNPs-NH₄M20 matrix and the way of formation of Ag⁺ adducted n-alkanes were also discussed and studied by using the quantum chemical calculation.

已发现，负载有铵交换的丝光沸石（NH ₄ M20）的银纳米颗粒（AgNPs）是检测短正构烷烃的有效无机基质（AgNPs-NH ₄ M20），而短链正构烷烃在常规MALDI质谱法中很难被电离。含烷烃的银离子加合物，包括正十七烷（C ₁₇ H ₃₄），正_十八烷（C ₁₉ H ₄₀），正二十三烷（C ₂₃ H ₄₈），正_十四烷（C ₂₄ H ₅₀），正庚烷（C ₂₇ H ₅₆），允许通过MALDI-TOF-MS分析短链正构烷烃。沸石作为载体可以提高Ag ⁺的峰强度通过有效利用激光能量来加成正构烷烃。通过量子化学计算，研究和研究了AgNPs-NH ₄ M20基体中的沸石特征以及Ag ⁺加成正构烷烃的形成方式。