NPPA and colorectal cancer: Significant activation of afterglow luminescence by a factor of ~122-fold can be achieved by incubating F12+-ANP with H2S within 1 min, followed by irradiation with an 808-nm laser, allowing for rapid quantification of the H2S concentration in blood samples of healthy persons and patients diagnosed with hepatic cancers (HCCs) or colorectal cancers (CRCs).