High precision cadmium isotope analysis of geological reference materials by double spike MC-ICP-MS

Peng, Huanfa; He, Dong; Guo, Rui; Liu, Xing; Belshaw, N.S.; Zheng, Huajun; Hu, Shenghong; Zhu, Zhenli

doi:10.1039/d0ja00424c

Cited by 25 publications

(61 citation statements)

References 34 publications

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“…Insufficient information is available about the threshold ratio of Pd because of the low levels in environmental and geological samples. However, our results for Pd were similar to those reported by Liu et al 25 For In, previously reported threshold ratios ranged from 10 −3 to 0.02, 25,28 and our result for In was similar to that reported by Peng et al 28 For Sn, different levels (0.02 to 0.5) of Sn-to-Cd ratios were reported by different laboratories, [26][27][28] and our result for Sn fell within that range. However, the interference trends of In and Sn in this study were different from those reported previously.…”

Section: Measurement Using Mc-icp-mssupporting

confidence: 92%

“…This may be due to the fact that a high 113 In signal, produced from high In content, can disrupt the data correction of Cd. 28 For Sn, δ 114/110 Cd values decreased when the ratio of Sn to Cd increased, but the decrease was small. As mentioned earlier, the threshold ratios of Sn were different among different studies.…”

Section: Measurement Using Mc-icp-msmentioning

confidence: 92%

“…As mentioned earlier, the threshold ratios of Sn were different among different studies. [26][27][28] In addition, Liu et al 25 reported that the interference of Sn can be corrected. Therefore, the threshold ratios of interference may be related to different instruments and experimental conditions that may produce different mass discrimination, 26,28 as well as the difference in the trend of interference.…”

Section: Measurement Using Mc-icp-msmentioning

confidence: 99%

“…Digestion is then performed using an oven or a hot plate for tens of hours. [25][26][27][28] Although these methods can completely digest samples, they are time-consuming and exhibit poor organic matter removal performance due to the incomplete oxidation of carbon. Unfortunately, most environmental samples, such as agricultural soils and plants, contain large amounts of organic matter that can significantly affect the analytical accuracy of Cd isotope ratios.…”

Section: Introductionmentioning

confidence: 99%

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Cadmium Isotope Analysis Of Environmental Reference Materials Via Microwave Digestion–Resin Purification–Double-Spike MC-ICP-MS

Yin¹,

Liang²

2022

At.Spectrosc.

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Cadmium isotope fractionation is a promising indicator for tracing the source, transport, and transformation of Cd in the environment; therefore, a high-precision method for the Cd isotope analysis of environmental samples is urgently required. In this study, eight environmental reference materials (NIST 2711a, GSS-1, GSS-4, GSS-5, GSD-11, GSD-12, GSD-30, and BCR-679) with different matrices were digested under microwave irradiation and purified via anion exchange. Thereafter, their Cd isotope ratios were analyzed using multi-collector inductively coupled plasma mass spectrometry (MC-ICP-MS) with double-spike correction. The samples digested under microwave irradiation exhibited high Cd recovery (> 96%). One step of anion-exchangebased purification can remove most interfering elements without any detectable loss of Cd. If the purified solution contained Zn/Cd > 0.04, Zr/Cd > 0.01, Mo/Cd > 0.2, Pd/Cd > 4 × 10 −5 , In/Cd > 0.02, or Sn/Cd > 0.1, a secondary step using the same purification procedure would be necessary. The measured δ 114/110 Cd values of reference materials (from −0.558 to 0.550‰) were in adequate agreement with those of previous studies, suggesting that this method can be used to analyze the Cd isotope ratios in soil, sediment, and plant samples. In addition, the large variation in the Cd isotope ratios of these reference materials implies that the Cd isotope ratio is promising for identifying pollution sources and the biogeochemical cycle of Cd.

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Section: Measurement Using Mc-icp-mssupporting

confidence: 92%

Section: Measurement Using Mc-icp-msmentioning

confidence: 92%

Section: Measurement Using Mc-icp-msmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Cadmium Isotope Analysis Of Environmental Reference Materials Via Microwave Digestion–Resin Purification–Double-Spike MC-ICP-MS

Yin¹,

Liang²

2022

At.Spectrosc.

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“…Cd and Sr isotope ratios were determined by a Nu Plasma II MC-ICP-MS (UK), and the instrumental operation parameters are listed in Table S1. The isotope samples were analyzed in 2% v/v HNO 3 , and the instrumental mass discrimination of Cd was corrected by the double-spike method, as reported in our previous work . For Sr isotope measurement, 87 Sr/ 86 Sr was corrected for instrument mass bias by normalizing to 86 Sr/ 88 Sr = 0.1194 …”

Section: Methodsmentioning

confidence: 99%

Development of an Automatic Column Chromatography Separation Device for Metal Isotope Analysis Based on Droplet Counting

Zhou

Miao

et al. 2021

Anal. Chem.

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A novel, simple, cost-effective, reliable, and practical automatic column chromatography separation device capable of simultaneously purifying samples for radiogenic and non-traditional stable isotope analysis has been developed. The device avoids the use of any pump and features eluent driving by the siphon effect (gravity) and quantitative control by infrared droplet counting. Several factors affecting the control of droplets were investigated, including types and concentrations of eluents and the height of the liquid level. Results showed that accurate dripping of the eluent could be readily achieved by controlling the number of droplets under selected conditions. The separation performance of the device was first demonstrated by the elution of Sr and Cd in synthetic matrix solutions. The recoveries of Sr and Cd samples were better than 87.6 and 95.0%, respectively, and the whole procedure blank was about 0.3 ng for Sr and 0.1 ng for Cd. Finally, the reliability of the device was further validated by the purification of Sr and Cd from different geological reference materials (NIST 2711a, Nod-A-1, BCR-2, and BHVO-2). The determined Cd and Sr isotope values agree well with their reference values within the uncertainty range. All these results clearly demonstrate the reliability and practicability of the proposed device, which provides a promising method for the automated purification of isotope samples.

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High-precision double-spike Cd isotopic measurements of seawater by MC-ICP-MS and its application to seawater affected by hydrothermal vent fluids

Zhu,

Wu,

Wen

et al. 2023

Acta Geochim

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High precision cadmium isotope analysis of geological reference materials by double spike MC-ICP-MS

Abstract: The effect of the DS ratio is evaluated and a correction approach is proposed to improve the accuracy and robustness of the proposed DS Cd isotope analysis.

Cited by 25 publications

References 34 publications

Cadmium Isotope Analysis Of Environmental Reference Materials Via Microwave Digestion–Resin Purification–Double-Spike MC-ICP-MS

Cadmium Isotope Analysis Of Environmental Reference Materials Via Microwave Digestion–Resin Purification–Double-Spike MC-ICP-MS

Development of an Automatic Column Chromatography Separation Device for Metal Isotope Analysis Based on Droplet Counting

High-precision double-spike Cd isotopic measurements of seawater by MC-ICP-MS and its application to seawater affected by hydrothermal vent fluids

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