激光光谱法分析冰川水中的稳定同位素比值（O/O、O/O 和 D/H）。

Analysis of the Stable Isotope Ratios (O/O, O/O, and D/H) in Glacier Water by Laser Spectrometry.

机构信息

Anhui Provincial Key Laboratory of Photonic Devices and Materials, Anhui Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Hefei 230031, China.

Laboratoire de Physicochimie de l'Atmosphère, Université du Littoral Côte d'Opale, 189A Avenue, Maurice Schumann, 59140 Dunkerque, France.

出版信息

Anal Chem. 2020 Mar 17;92(6):4512-4517. doi: 10.1021/acs.analchem.9b05679. Epub 2020 Mar 3.

DOI:10.1021/acs.analchem.9b05679

PMID:32083471

Abstract

A compact isotope ratio sensor based on laser absorption spectroscopy at 2.7 μm was developed for high precision and simultaneous measurements of the D/H, O/O and O/O isotope ratios in glacier water. Measurements of the oxygen and hydrogen isotope ratios in glacier water demonstrate a 1σ precision of 0.3‰ for δO, 0.2‰ for δO, and 0.5‰ for δH, respectively. The δ values of the working standard glacier water obtained by the calibrated sensor system is basically identical to the IRMS measurement results with a very high calibration accuracy from 0.17‰ to 0.75‰. Preliminary results on the reproducibility measurements display a standard deviation of 0.13‰ for δO, 0.13‰ for δO, and 0.64‰ for δH, respectively.

摘要

一种基于 2.7μm 激光吸收光谱的紧凑型同位素比传感器已被开发出来，用于高精度、同时测量冰川水中的 D/H、O/O 和 O/O 同位素比。对冰川水中氧和氢同位素比的测量表明，δO 的 1σ 精度为 0.3‰，δO 为 0.2‰，δH 为 0.5‰。用校准后的传感器系统测量的工作标准冰川水的 δ 值与 IRMS 测量结果基本一致，校准精度非常高，在 0.17‰到 0.75‰之间。对重现性测量的初步结果显示，δO 的标准偏差为 0.13‰，δO 为 0.13‰，δH 为 0.64‰。