Abstract: A solution replacement method according to an embodiment may be a solution replacement method of replacing a solution in a plurality of microwells formed on a substrate. The method may include: replacing an immiscible liquid that is immiscible to a first solution and seals the plurality of microwells that are filled with the first solution, with a gas; and filling the plurality of microwells with a second solution by introducing the second solution onto the substrate on which the immiscible liquid has been replaced with the gas.

Abstract: The method according to an embodiment may be a method of transporting a liquid to a device in which a plurality of microwells formed on a substrate. The method may include: forming, in advance, at a position different from the device, a multiphase plug in which a solution for filling the plurality of microwells and an immiscible liquid that is immiscible with the solution for sealing the plurality of microwells filled with the solution are arranged in that order from a front in a flow direction; and transporting the multiphase plug to the device.

Abstract: Disclosed is a method of recovering a peptide, including: mixing a liquid sample containing a complex of peptide and protein in blood with a reagent containing a neutral amino acid, an acidic amino acid or both the neutral and acidic amino acids to liberate the peptide from the protein in blood; and recovering the liberated peptide.

Abstract: Disclosed is a method of recovering a peptide including: mixing a liquid sample containing a complex of peptide and protein in blood with a reagent containing at least one selected from the group consisting of Zn2+, Ca2+, Li+, Ba2+, Mg2+, Mn2+, and a metal compound that forms any of these metal ions to liberate the peptide from the protein in blood; and recovering the liberated peptide.

Abstract: Disclosed is a method of recovering a peptide including: mixing a liquid sample containing a complex of peptide and protein in blood with a reagent containing at least one selected from the group consisting of Zn2+, Ca2+, Li+, Ba2+, Mg2+, Mn2+, and a metal compound that forms any of these metal ions to liberate the peptide from the protein in blood; and recovering the liberated peptide.

Abstract: Disclosed is a method of recovering a peptide, including: mixing a liquid sample containing a complex of peptide and protein in blood with a reagent containing a neutral amino acid, an acidic amino acid or both the neutral and acidic amino acids to liberate the peptide from the protein in blood; and recovering the liberated peptide.

Abstract: A novel method capable of liberating a peptide from a complex of peptide and albumin and the associated method of recovering the peptide are provided. When a liquid sample containing a complex of peptide and albumin undergoes heat treatment, a self-aggregate of albumin formed in the liquid sample. The peptide is simultaneously liberated from the complex and recovered by removing the self-aggregate from the liquid sample.

Abstract: A novel method capable of liberating a peptide from a complex of peptide and albumin and the associated method of recovering the peptide are provided. When a liquid sample containing a complex of peptide and albumin undergoes heat treatment, a self-aggregate of albumin formed in the liquid sample. The peptide is simultaneously liberated from the complex and recovered by removing the self-aggregate from the liquid sample.