Photo-Pyroelectric Spectrometry and its Application to Flow Analysis

光热释电光谱及其在流动分析中的应用

• 批准号: 01550571
• 负责人: HINOUE Teruo
• 金额: $ 1.15万
• 依托单位: Osaka University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for General Scientific Research (C)
• 财政年份: 1989
• 资助国家: 日本
• 起止时间: 1989 至 1990
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-01550571/
• 关键词: Photothermal spectrometry; Pyroelectric effect; PZT; Flow injection analysis; Absorption spectrometric analysis; He-Ne laser; 焦電センサ-; フロ-分析法; 吸光分析法

Photo-pyroelectric spectrometry (PPES) with a compact sensor probe including a PZT pyroelectric ceramic piece and a He-Ne laser as an excitation source was studied. The signal induced by the laser irradiation in a mode of step function or in a modulated mode could be explained by a classic theory on heat conduction. The detection limit was determined as 1.6 x 10^<-4> cm^- in the Napierian absorption coefficient. The PPES was applied to batchwise colorimetric determination of phosphate and ammonia in natural water on the basis of the heteropoly blue method and the indophenol method, respectively. The detection limit was 2.7 ppb for PO_4^+-P and 2.1 ppb for NH_4^+-N. Further, flow analysis was tested by using the PPES. The detection limit was 0.97 x 10^<-4> cm^<-1>, which was slightly better than that of the batchwise method. This shows that the PPES is available for a detector in the flow analysis. The flow injection analysis for phosphate and silicate was performed by using the PPES. In order to use the PPES practically, the use of a laser diode with high power and improvement of the flow cell and the PZT sensor probe are desired.

研究了采用紧凑型传感器探头（包括 PZT 热释电陶瓷片和 He-Ne 激光器作为激发源）的光热释电光谱 (PPES)。激光照射以阶跃函数模式或调制模式感应的信号可以用经典的热传导理论来解释。检测限确定为Napierian吸收系数中的1.6×10^-4cm^-。将PPES分别应用于杂多蓝法和靛酚法的间歇比色测定天然水中的磷酸盐和氨氮。 PO_4^+-P 的检测限为 2.7 ppb，NH_4^+-N 的检测限为 2.1 ppb。此外，使用PPES测试了流动分析。检测限为0.97×10^-4cm^-1>，略优于分批法。这表明PPES可用于流量分析中的检测器。使用 PPES 进行磷酸盐和硅酸盐的流动注射分析。为了实际使用PPES，需要使用高功率激光二极管以及改进流动池和PZT传感器探头。

项目成果

Teruo HINOUE Junya KAJI, Yu YOKOYAMA, Michihiro MURATA: "Photopyroelectric spectrometry and its application to determination of trace constituents in natural water"

Teruo HINOUE Junya KAJI、Yu YOKOYAMA、Michihiro MURATA：“光热电光谱法及其在天然水中痕量成分测定中的应用”

Teruo HINOUE: "Photopyroelectric spectrometry and its application to determination of trace constituents in natural water"

Teruo HINOUE：“光热电光谱法及其在天然水中痕量成分测定中的应用”