SUBSTANCE ANALYSIS METHOD AND ANALYSIS DEVICE

• Main Authors: TSUMURA AKIRA, KUSABA MIYUKI, HASEGAWA YUTAKA, ASAGARA TAKASHI, MAEKAWA YO
• Format: Patent
• Language: English; Japanese
• Published: 28.09.2017
• Subjects: INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIRCHEMICAL OR PHYSICAL PROPERTIES; MEASURING; PHYSICS; TESTING

PROBLEM TO BE SOLVED: To provide a substance analysis method and an analysis device with which it is possible to measure an absorption rate with high accuracy.SOLUTION: The substance analysis method comprises: a first step of estimating, within a frequency band that includes at least one absorption line of an object substance included in a measurement sample, a tentative reference signal from a sample signal of a low absorption rate section on the basis of a sample signal that corresponds to the intensity of light having passed through the measurement sample; a second step of subtracting the tentative reference signal from the sample signal and calculating the distribution of tentative absorption rate; a third step of determining a wavenumber section in which the tentative absorption rate is less than or equal to a prescribed value, and re-estimating a reference signal on the basis of a sample signal of the wavenumber section; and a fourth step of subtracting the re-estimated reference signal from the sample signal and calculating the distribution of absorption rate.SELECTED DRAWING: Figure 3 【課題】吸収率を高い精度で測定可能な物質分析方法および分析装置を提供する。【解決手段】物質分析方法は、測定試料に含まれる対象物質の少なくとも１つの吸収線を含む波数帯域内において、前記測定試料を透過した光の強度に対応したサンプル信号に基づいて、吸収率が低い区間のサンプル信号から暫定リファレンス信号を推定する第１ステップと、前記サンプル信号から前記暫定リファレンス信号を除算して暫定吸収率の分布を算出する第２ステップと、前記暫定吸収率が所定値以下となる波数区間を決定し、前記波数区間のサンプル信号に基づいてリファレンス信号を再推定する第３ステップと、前記サンプル信号から再推定された前記リファレンス信号を除算して吸収率の分布を算出する第４ステップと、を有する。【選択図】図３