SAMPLE ANALYZER AND SAMPLE ANALYSIS METHOD

• Main Authors: MIKAWA HIROAKI, TAKAHASHI MASARU, OKUZAKI YUICHI, HAYASHI AYUMI, KAWASAKI KOHEI, CHIYOMARU MASARU
• Format: Patent
• Language: English; Japanese
• Published: 13.03.2023
• Subjects: CHEMISTRY; INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIRCHEMICAL OR PHYSICAL PROPERTIES; MEASURING; METALLURGY; PHYSICS; TESTING; TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE

To appropriately analyze so as to maintain the concentrations of trivalent and hexavalent chromium included in a process liquid in a desired range.SOLUTION: Provided is a sample analyzer 100 comprising: an oxidation reaction unit 70 for oxidizing trivalent chromium contained in the sample liquid having been extracted from a process liquid for treating the surface of a metal material into a hexavalent chromium; a detection unit 40 for detecting the concentration of trivalent chromium and the concentration of hexavalent chromium contained in the sample liquid; and a control unit 60 for selectively executing a first supply mode in which a first sample liquid having passed through the oxidation reaction unit 70 is supplied to the detection unit 40 and a second supply mode in which a second sample liquid having not passed through the oxidation reaction unit 70 is supplied to the detection unit 40. The detection unit 40 detects a first concentration of hexavalent chromium contained in the first sample liquid and a second concentration of hexavalent chromium contained in the second sample liquid and detects the concentration of trivalent chromium contained in the second sample liquid, on the basis of the first and second concentrations.SELECTED DRAWING: Figure 2 【課題】処理液に含まれる三価クロム及び六価クロムの濃度を所望の範囲に保つように適切に分析する。【解決手段】金属材料の表面処理を行うための処理液から抽出された試料液に含まれる三価クロムを六価クロムに酸化させる酸化反応部７０と、試料液に含まれる三価クロムの濃度及び六価クロムの濃度をそれぞれ検出する検出部４０と、酸化反応部７０を通過させた第１の試料液を検出部４０に供給する第１供給モードと、酸化反応部７０を通過させない第２の試料液を検出部４０に供給する第２供給モードとを選択的に実行する制御部６０と、を備え、検出部４０は、第１の試料液に含まれる六価クロムの第１濃度と第２の試料液に含まれる六価クロムの第２濃度とを検出し、第１濃度及び第２濃度に基づいて第２の試料液に含まれる三価クロムの濃度を検出する試料分析装置１００を提供する。【選択図】図２