New insights into the source of the boron memory effect and implications for accurate boron isotope measurements

doi:10.1002/rcm.9526

	New insights into the source of the boron memory effect and implications for accurate boron isotope measurements
	Cai, Yue 1,2,3,6,7; Chen, Heng 3,6,7; Li, Baichan 1,2; Rasbury, E. Troy 4; Halliday, Alex N.3,5
刊名	RAPID COMMUNICATIONS IN MASS SPECTROMETRY
	2023-07-15
卷号	37 期号:13 页码:10
ISSN号	0951-4198
DOI	10.1002/rcm.9526
通讯作者	Cai, Yue(cai@nigpas.ac.cn) ; Chen, Heng(hengchen@ldeo.columbia.edu)
英文摘要	RationaleThe boron (B) memory effect is a concern for B isotope analysis in inductively-coupled plasma mass spectrometry and a potential cause of poor data comparability between laboratories. It is widely assumed that the memory resides in water droplets on the surface of the spray chamber. However, even without the use of the spray chamber, background subtractions are still required to generate accurate data, therefore additional causes for the memory effect exist, which are investigated here. MethodsDifferent parts of the mass spectrometer were examined to pinpoint the source of a particularly high B background. After identifying the torch as the source of the background, different parts of the torch were soaked in dilute nitric acid, which was analyzed for B over time. ResultsB was leached out of the tip of the outer quartz tube of the torch in a fashion similar to borosilicate glass, which suggests the incorporation of B into the silica structure of the torch at high temperatures. Running 3% nitric acid washes effectively reduces the background. B background compositions change based on the solutions run beforehand, therefore different blank subtraction methods generate systematic differences. A new background subtraction method that utilizes B isotope ratios improved the precision by up to 0.14 parts per thousand. The addition of a water wash step before sample elution led to smaller eluent volumes and improved matrix matching without causing a B breakthrough. ConclusionsAn important part of the B memory derives from the torch glass, which incorporates B from sample solutions at high temperatures. Multiple nitric acid washes, matrix matching, blank subtraction, and standard sample bracketing generated accurate B isotope analyses with background/signal ratios as high as 10%, without the need for hazardous chemicals as washes. B isotope values of two sediment standards that represent average post-Archean continental crust were reported.
资助项目	National Science Foundation ; EAR-GeoPRISIMS ; [EAR-1324725] ; [EAR-1714892] ; [1457293]
WOS关键词	CONTINENTAL-CRUST ; PH ; FRACTIONATION ; PLASMA ; NEBULIZATION ; SPECTROMETRY ; TEMPERATURE ; SEAWATER ; OCEAN
WOS研究方向	Biochemistry & Molecular Biology ; Chemistry ; Spectroscopy
语种	英语
出版者	WILEY
WOS记录号	WOS:000988395200001
资助机构	National Science Foundation ; EAR-GeoPRISIMS
内容类型	期刊论文
源URL	[http://ir.nigpas.ac.cn/handle/332004/42223]
专题	中国科学院南京地质古生物研究所
通讯作者	Cai, Yue; Chen, Heng
作者单位	1.Chinese Acad Sci, Nanjing Inst Geol & Palaeontol, State Key Lab Palaeobiol & Stratig, Nanjing, Peoples R China 2.Chinese Acad Sci, Ctr Excellence Life & Paleoenvironm, Nanjing, Peoples R China 3.Columbia Univ, Lamont Doherty Earth Observ, Palisades, NY USA 4.SUNY Stony Brook, Dept Geosci, 255 Earth & Space Sci Bldg, Stony Brook, NY USA 5.Columbia Univ, Columbia Climate Sch, New York, NY USA 6.Chinese Acad Sci, Nanjing Inst Geol & Palaeontol, State Key Lab Palaeobiol & Stratig, Nanjing 210008, Peoples R China 7.Chinese Acad Sci, Ctr Excellence Life & Paleoenvironm, Nanjing 210008, Peoples R China
推荐引用方式 GB/T 7714	Cai, Yue,Chen, Heng,Li, Baichan,et al. New insights into the source of the boron memory effect and implications for accurate boron isotope measurements[J]. RAPID COMMUNICATIONS IN MASS SPECTROMETRY,2023,37(13):10.
APA	Cai, Yue,Chen, Heng,Li, Baichan,Rasbury, E. Troy,&Halliday, Alex N..(2023).New insights into the source of the boron memory effect and implications for accurate boron isotope measurements.RAPID COMMUNICATIONS IN MASS SPECTROMETRY,37(13),10.
MLA	Cai, Yue,et al."New insights into the source of the boron memory effect and implications for accurate boron isotope measurements".RAPID COMMUNICATIONS IN MASS SPECTROMETRY 37.13(2023):10.