It can be covalently coupled with biological ligands such as polypeptides, proteins, antibodies and oligonucleotides under the action of special chemical reagents (such as EDC), and can be used in the following fields: affinity purification, chemiluminescence, cell classification, biosensors, immunoassay, high-sensitivity analysis, molecular diagnosis, nucleic acid sample preparation, purified PCR products, cell /DNA/mRNA extraction, cyclic sequencing clearance, gene expression analysis/genotyping, etc.