Determination of the isotopic composition of lutetium using MC-ICPMS

He, Jilin; Meija, Juris; Hou, Xiandeng; Zheng, Chengbin; Mester, Zoltán; Yang, Lu

doi:10.1007/s00216-019-02271-6

Cited by 7 publications

(15 citation statements)

References 35 publications

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“…A self-aspiration nebulizer was used for sample introduction to MC-ICPMS. In order to induce a drift in the instrumental mass bias, the radio-frequency power of the ICP was deliberately changed during the measurement. − Changing the radio frequency (rf) power did not affect the peak shape, and the plasma rf power was increased stepwise from P 0 ≈ 1220 W to P max ≈ 1280 W in four steps over a 15 min period . During this process, Zr, Rb, and Sr signal intensity dropped by approx.…”

Section: Methodsmentioning

confidence: 99%

“…The evaluation of Zr isotope ratio uncertainty was performed as described in our previous studies. , In brief, the ordinary least-squares fit was applied to each regression set; the corresponding intercept, slope, and their uncertainties were obtained. These regression parameters were then converted into isotope ratios using eq .…”

Section: Methodsmentioning

confidence: 99%

“…A lower-cost alternative which we use in this work is the regression method which requires an isotopic standard of another element. This approach has been sufficiently validated , and has been successfully used for many elements. − In this study, certified isotopic reference materials NIST SRM 984 Rb and NIST SRM 987 Sr were used as primary calibrators and, in turn, a new Zr isotopic certified reference material NRC ZIRC-1 was made available.…”

Section: Introductionmentioning

confidence: 99%

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Determination of the Isotopic Composition of Zirconium Using MC-ICPMS and a Regression Model for Mass Bias Correction

Meija

Yang

2021

Anal. Chem.

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Measurements of zirconium isotopes provide insights into the formation of planetary bodies, dating nuclear explosions, or maintenance of nuclear reactors. Although many comparative measurements for the isotopic composition of zirconium have been performed using mass spectrometry, there is a lack of zirconium isotopic reference materials and only a single calibrated measurement has been reported to date by total evaporation thermal ionization mass spectrometry (TE-TIMS). In this study, we report an independent measurement of full zirconium isotopic composition in a new zirconium isotopic reference material by multicollector inductively coupled plasma MS using the regression method and two independent certified isotopic reference materials, NIST SRM 984 Rb and NIST SRM 987 Sr. Our results agree well with the recent TE-TIMS measurements and suggest a revision of the standard atomic weight of zirconium.

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Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Determination of the Isotopic Composition of Zirconium Using MC-ICPMS and a Regression Model for Mass Bias Correction

Meija

Yang

2021

Anal. Chem.

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“…Such method is costly for gadolinium, having seven isotopes. A low-cost alternative approach, employed in this work, is the regression model, which is increasingly employed for absolute isotope amount ratio measurements. − This model enables performing calibrated isotope ratio measurements of an element using isotopic standard of another element.…”

mentioning

confidence: 99%

Determination of the Isotopic Composition of Gadolinium Using Multicollector Inductively Coupled Plasma Mass Spectrometry

Yang

Hou

et al. 2020

Anal. Chem.

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In this study, we report independent measurements of all stable isotope ratios of gadolinium. Our study employs multicollector inductively coupled plasma mass spectrometry (MC-ICPMS) with National Research Council Canada (NRC) HALF-1 isotopic hafnium standard as a primary calibrator and surveys four commercial gadolinium materials, including a NRC candidate isotopic reference material, GADS-1. The isotopic composition of gadolinium is determined using the regression model without reliance on conventional normalizing isotope ratios or mass-dependent isotope ratio correction models. In this work, all gadolinium isotope ratios were obtained from 160 Gd/ 158 Gd which, in turn, was measured from hafnium 178 Hf/ 177 Hf either directly or indirectly through 167 Er/ 166 Er. The latter approach was used for the final determination of gadolinium isotopic composition, as it provides smaller combined uncertainty. We report high-precision measurements of the isotopic composition of gadolinium, which support a revised standard atomic weight. Isotope amount ratios of R 152/158 = 0.008 20(2) k=1 , R 154/158 = 0.087 98(12) k=1 , R 155/158 = 0.596 81(63) k=1 , R 156/158 = 0.825 08(57) k=1 , R 157/158 = 0.630 60(22) k=1 , and R 160/158 = 0.879 10(60) k=1 , and the atomic weight of A r (Gd) = 157.2502(6) k=1 were obtained for gadolinium in GADS-1.

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“…The regression model, which also uses a primary isotope reference material of a different element but is not derived from either the exponential or the Russell law, is one of the most state-of-the-art methods for instrumental fractionation correction. , Initially proposed by Marechal et al, this model was modified and applied for the determination of absolute isotopic composition and atomic weight of Ge and In. , Further development of the modified regression model led to the reduction of measurement time from 6–15 h to less than 30 min per session. ,, By means of this optimized regression model (ORM), the absolute isotopic composition was re-established for such elements as Ir, Mo, Pb, Os, Lu, and Hf, ,− and most of the results obtained were adopted by IUPAC as best atomic weight values (Ir, Hf, Ge, In). Moreover, after the primary validation of ORM, it was additionally cross-validated with the expensive full gravimetric isotope mixture model, which on the contrary requires matrix matching .…”

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confidence: 99%

Novel Approach for the Accurate Determination of Se Isotope Ratio by Multicollector ICP-MS

et al. 2020

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In this work, a method for the accurate and precise determination of 82 Se/ 78 Se isotope ratio in natural samples of environmental and biological origin, using multicollector inductively coupled plasma mass spectrometry in a wet plasma mode without using neither hydride generation nor separation of Se, was developed. It was based on the optimized regression model with standard–sample bracketing (ORM–SSB) to efficiently correct instrumental isotopic fractionation/mass bias and matrix effects. In addition, three mass bias correction models of SSB alone, SSB combined with internal standard (IS–SSB), and ORM–SSB were compared for the Se isotope ratio measurements. NIST SRM 987 Sr was used as an internal standard, and the reproducibility of the results obtained with the proposed method was verified by measuring NIST SRM 3149 standard over different days (nine independent measurement sessions). Delta values of the 82 Se/ 78 Se isotope ratio were measured in selenium-enriched yeast-certified reference material SELM-1, natural selenomethionine samples, and model solutions of artificial seawater. Solutions obtained after thiol resin treatment were measured to demonstrate the applicability of the proposed method in eliminating matrix effects due to residual of thiol resin in the sample solutions. Among three mass bias correction models, ORM–SSB correction model proved to be the best to eliminate the matrix effects and instrumental drift. IS–SSB model offered also a good precision but was slightly less accurate. Both models showed good robustness against effects of different sample matrices. Finally, the SSB alone could not be recommended for Se isotope analysis as it produces inaccurate and imprecise results.

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Determination of the isotopic composition of lutetium using MC-ICPMS

Cited by 7 publications

References 35 publications

Determination of the Isotopic Composition of Zirconium Using MC-ICPMS and a Regression Model for Mass Bias Correction

Determination of the Isotopic Composition of Zirconium Using MC-ICPMS and a Regression Model for Mass Bias Correction

Determination of the Isotopic Composition of Gadolinium Using Multicollector Inductively Coupled Plasma Mass Spectrometry

Novel Approach for the Accurate Determination of Se Isotope Ratio by Multicollector ICP-MS

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