Large-scale sensitivity adjustment for Gd-HMME room temperature phosphorescence oxygen sensing

作者：Zhang, Honglin; Liu, Ting; Li, Qiuhe; Zhang, Xiyu; Zhao, Hua; Zheng, Yangdong; Qin, Feng; Zhang, Zhiguo^*; Sheng, Tianqi; Tian, Ye

来源：Spectrochimica Acta - Part A: Molecular and Biomolecular Spectroscopy , 2022, 267: 120490.

DOI：10.1016/j.saa.2021.120490

• Gd-HMME
• Phosphorescence
• Quenching constant K-SV
• Limit of detection

The oxygen sensing enhancement based on room temperature phosphorescence (RTP) of Gd-HMME adjusted by imidazole was studied. The phosphorescence intensity I-P0 and the Stern-Volmer equations under different imidazole concentration were obtained, and the physical mechanism of imidazole regulating the oxygen quenching constant K-SV was analyzed. It was found that the K-SV value increased by similar to 46 folds in the range of 12.4(1)-576.1(5) kPa(-1), and the large-scale variation of KSV is conducive to the realization of high precision oxygen concentration measurement in a wide range. In addition, the standard deviation sigma of continuous measurement results was given, and the limit of detection (LOD) was determined to be 6.6 ppm.

• 单位
  1; 哈尔滨医科大学