Abstract: The present invention announces a method for extending the storage life of a test reagent for quantification of ionic components in samples by using an anion sensor. The purpose of the present invention is to provide an anion sensor, wherein the storage life of the anion sensor itself may be extended, to thereby extend the storage life of the anion sensor beyond that of conventional anion sensors. According to the present invention, through adjustment of the pH of the internal solution (internal gel liquid), it is possible to provide an anion sensor that maintains consistent performance, and has longer storage life.

Abstract: An electrolyte concentration measuring apparatus is provided with: a plurality of ion selective electrodes and one reference electrode; a sample introduction unit that introduces a sample solution to the plurality of ion selective electrodes and the reference electrode; a potential measuring unit that measures a voltage between the plurality of ion selective electrodes and the reference electrode; and a resistance measuring unit that measures a direct-current resistance of the plurality of ion selective electrodes.

Abstract: This invention provides an adsorbent material capable of effectively trapping a target component in a sample solution and releasing the same, which has the satisfactory trapping capacity via hydrophobic interactions and via ion exchange reactions. The invention relates to an adsorbent material comprising a porous material of a polymer compound which is a copolymer obtained via copolymerization of a hydrophobic monomer (A), a hydrophilic monomer (B) capable of undergoing a second-order reaction, and a hydrophilic monomer (C) exhibiting a hydrogen-bonding capacity, and via introduction of an ion exchange group into a repeat unit derived from the hydrophilic monomer (B).

Abstract: The present invention is related to a method for MALDI-TOF-MS analysis and/or sequencing of oligoribonucleotides. The present invention is also related to a method for determining the DNA nucleotide sequence using MALDI-TOF-MS, and a method for determining polymorphism using MALDI-TOF-MS. The present invention provides a kit for analyzing and/or sequencing a DNA template or a RNA transcription product and/or for determining polymorphism by MALDI-TOF-MS.