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DOI	10.1002/rcm.8689
	Demonstration of a memory calibration method in water isotope measurement by laser spectroscopy
	Qu, Dongmei; Tian, Lide; Zhao, Huabiao; Yao, Ping; Xu, Baiqing; Cui, Jiangpeng
通讯作者	Qu, DM (通讯作者)
发表日期	2020
ISSN	0951-4198
EISSN	1097-0231
卷号	34 期号:8
英文摘要	Rationale Measuring delta O-18 and delta H-2 values in water using wavelength-scanned cavity ring down spectroscopy (WS-CRDS) requires multiple injections of up to six (and sometimes eight or more) of one sample to remove the memory effect, which decreases the sample throughput and increases the consumables cost. Thus, improved methods for removing the memory effect are required. Methods We calculated the memory coefficients by sequential WS-CRDS measurement of two lab standard waters with isotopic differences, and used them to establish calibration equations. We then used these equations to correct the measured delta O-18 and delta H-2 values by removing the memory effect, instead of using multiple injections in the routine daily measurements. Results By using this method, the number of injections per sample was reduced to one. The reproducibility (one standard deviation) of the delta O-18 and delta H-2 values obtained for quality control sample was less than 0.05 parts per thousand and 0.5 parts per thousand for an annual average, respectively. Conclusions By measuring the memory coefficients and establishing the calibration equations, a highly effective method was developed for determining the delta O-18 and delta H-2 values of water, which could significantly improve sample throughput for liquid water dual isotope measurement without sacrificing the precision.
关键词	LONG-TERM ACCURACY DELTA-O-18 DELTA-H-2 PRECISION HYDROGEN SAMPLES OXYGEN
语种	英语
WOS研究方向	Biochemistry & Molecular Biology ; Chemistry ; Spectroscopy
WOS类目	Biochemical Research Methods ; Chemistry, Analytical ; Spectroscopy
WOS记录号	WOS:000519265300013
来源期刊	RAPID COMMUNICATIONS IN MASS SPECTROMETRY
来源机构	中国科学院青藏高原研究所
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/259848
推荐引用方式 GB/T 7714	Qu, Dongmei,Tian, Lide,Zhao, Huabiao,et al. Demonstration of a memory calibration method in water isotope measurement by laser spectroscopy[J]. 中国科学院青藏高原研究所,2020,34(8).
APA	Qu, Dongmei,Tian, Lide,Zhao, Huabiao,Yao, Ping,Xu, Baiqing,&Cui, Jiangpeng.(2020).Demonstration of a memory calibration method in water isotope measurement by laser spectroscopy.RAPID COMMUNICATIONS IN MASS SPECTROMETRY,34(8).
MLA	Qu, Dongmei,et al."Demonstration of a memory calibration method in water isotope measurement by laser spectroscopy".RAPID COMMUNICATIONS IN MASS SPECTROMETRY 34.8(2020).