▎ 摘　　要

NOVELTY - A polymeric nanofibrous membrane comprises a polymer, and 0.1-5 wt.% functionalized nanofiller with respect to the polymer. USE - Polymeric nanofibrous membrane used for detecting quality of pre-filter cartridge in filtering device for trapping analyte such as manganese, iron, copper, zinc, calcium, chromium, lead, rhodamine B, gram-negative bacteria, and gram-positive bacteria. The gram-negative bacteria is chosen from Escherichia coli, Acinetobacter baumanii, Pseudomonas aeruginosa, Klebsiella pneumoniae, and Neisseria gonorrhoeae. The gram-positive bacteria is chosen from Actinomyces, Bifidobacterium, Frankia, and Micrococcus (all claimed). ADVANTAGE - The membrane is effectively filter the water which passes through for specific period of time, and has excellent decontamination efficiency. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are included for the following: (1) preparation of the polymeric nanofibrous membrane; (2) a filtering device; and (3) method of detecting quality of a pre-filter cartridge.