▎ 摘　　要

NOVELTY - System for detecting an analyte comprises a fixing member and an aptamer reversibly bound to the fixing member, where the aptamer has a nucleotide sequences represented by SEQ ID NOs: 1-11 fully defined in the specification. USE - The system is used for detecting analyte. ADVANTAGE - The system increases analysis sensitivity and specificity by enabling detection in the initial state of a sample without fixing an analyte to a support. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for a method for detecting an analyte, which involves using the system for detecting the analyte.