Projects per year
Abstract
Boron isotope ratios (δ11B) are used across the Earth
Sciences and are increasing analyzed by Multi-Collector Inductively
Coupled Plasma Mass Spectrometry (MC-ICPMS). Accurate δ11B
MC-ICPMS analysis requires boron purification from the sample matrix
using ion-exchange column chromatography. However, the traditional
gravity-drip column method is time-consuming and prone to airborne
contamination due to its long duration and open resin surface. To
address these issues, we designed a novel, simple, and reliable column
chromatography technique called “peri-columns.” This method uses a
peristaltic pump to generate vacuum on a commonly used column set up.
This method uses sealed collection beakers and does not require
solutions to pass through pump tubing, minimizing contamination. The
duration is reduced by eight-fold, processing 12 samples in just 1.5 hr.
It also yields low and consistent total procedural blanks, averaging
11 pg. The efficiency and efficacy of this method were tested by
repeated boron purification from calcium carbonate and high-sodium
matrices with international and in-house reference materials. The
results matched those obtained using the gravity column method and fell
within our laboratory long-term and international certified values. The
mean δ11B and 2SD (standard deviation) of repeatedly processed NIST 8301f were 14.57 ± 0.26‰ (n = 31), NIST 8301c was 24.19 ± 0.33‰ (n = 10), STAiG-F1 was 16.20 ± 0.26‰ (n = 13), and seawater was 39.52 ± 0.32‰ (n = 10).
All the components of our techniques are commercially available, and it
is easily adaptable to other laboratories and isotope systems.
Original language | English |
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Article number | e2023GC011228 |
Number of pages | 13 |
Journal | Geochemistry, Geophysics, Geosystems |
Volume | 25 |
Issue number | 2 |
DOIs | |
Publication status | Published - 29 Jan 2024 |
Keywords
- Boron isotope
- Column chromatography
- Boron purification
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Breaking Earth's Thermostat: Breaking Earth’s thermostat: how do super-greenhouse climates occur?
Jurikova, H. (PI) & Jurikova, H. (PI)
1/09/23 → 31/08/26
Project: Fellowship
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OldCO2NewArchives: CO2 reconstruction: OldCO2NewArchives: CO2 Reconstruction over the last 100 Myr from novel geological archives
Rae, J. W. B. (PI)
1/02/19 → 31/01/24
Project: Fellowship