Refining boron isotopic measurements of silicate samples by multi-collector-inductively coupled plasma-mass spectrometry (MC-ICP-MS)

André N. Paul; Joseph A. Stewart; Samuele Agostini; Linda A. Kirstein; Jan C.M. De Hoog; Ivan P. Savov; Kristina Walowski; James W.B. Rae; Tim Elliott

doi:10.1111/ggr.12527

Refining boron isotopic measurements of silicate samples by multi-collector-inductively coupled plasma-mass spectrometry (MC-ICP-MS)

André N. Paul, Joseph A. Stewart, Samuele Agostini, Linda A. Kirstein, Jan C.M. De Hoog, Ivan P. Savov, Kristina Walowski, James W.B. Rae, Tim Elliott

Research output: Contribution to journal › Article › peer-review

Abstract

Solution MC-ICP-MS is an established technique for high precision boron isotope measurement results (δ¹¹B_{SRM 951}) in carbonates, yet its application to silicate rocks has been limited. Impediments include volatilisation during silicate dissolution and contamination during chemical purification. To address this, we present a low-blank sample preparation procedure that couples hydrofluoric acid-digestion and low-temperature evaporation (mannitol-free), to an established MC-ICP-MS measurement procedure following chemical purification using B-specific Amberlite IRA 743 resin. We obtain accurate δ¹¹B_{SRM 951} values (intermediate precision ±0.2‰) for boric acid (BAM ERM-AE121 19.65 ± 0.14‰) and carbonate (NIST RM 8301 (Coral) 24.24±0.11‰) reference materials. For silicate reference materials covering mafic to felsic compositions we obtain δ¹¹B_{SRM 951} with intermediate precision < ±0.6‰ (2s), namely JB-2 6.9 ± 0.4‰; IAEA-B-5 -6.0 ± 0.6‰; IAEA-B-6 -3.9 ± 0.5‰; 2s. Furthermore, splits of these same reference materials were processed by an alternative fusion and purification procedure. We find agreement excellent agreement between δ¹¹B_{SRM 951} measurement results by MC-ICP-MS of the reference materials using both sample processing techniques. These measurement results show that our sample processing and MC-ICP-MS methods provide consistent δ¹¹B_{SRM 951} values for low B-mass fraction samples. We present new data from Mid Ocean Ridge Basalt (MORB) glass, documenting a range in δ¹¹B_{SRM 951} from -5.6±0.3‰ to -8.8±0.5‰ (2s), implying some upper mantle δ¹¹B_{SRM 951} heterogeneity.

Original language	English
Number of pages	18
Journal	Geostandards and Geoanalytical Research
Volume	Early View
Early online date	4 Oct 2023
DOIs	https://doi.org/10.1111/ggr.12527
Publication status	E-pub ahead of print - 4 Oct 2023

Keywords

δ11BSRM 951
MORB volcanic glass
OIB volcanic glass
Silicate reference materials
MC-ICP-MS
HF digestion
Boron isotopes

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Copyright © 2023 The Authors. Geostandards and Geoanalytical Research published by John Wiley & Sons Ltd on behalf of International Association of Geoanalysts. This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.
Final published version, 1.23 MBLicence: CC BY

INTRIGUED: Investigating the role of the: INTRIGUED: Investigating The Role of the North Pacific in Glacial and Deglacial CO2 and Climate
Rae, J. W. B. (PI) & Burke, A. (CoI)
NERC
1/06/16 → 31/01/20
Project: Standard

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Paul, A. N., Stewart, J. A., Agostini, S., Kirstein, L. A., De Hoog, J. C. M., Savov, I. P., Walowski, K., Rae, J. W. B., & Elliott, T. (2023). Refining boron isotopic measurements of silicate samples by multi-collector-inductively coupled plasma-mass spectrometry (MC-ICP-MS). Geostandards and Geoanalytical Research, Early View. Advance online publication. https://doi.org/10.1111/ggr.12527

@article{a9093153c6e54649bc651fc2884b0fb7,

title = "Refining boron isotopic measurements of silicate samples by multi-collector-inductively coupled plasma-mass spectrometry (MC-ICP-MS)",

abstract = "Solution MC-ICP-MS is an established technique for high precision boron isotope measurement results (δ11BSRM 951) in carbonates, yet its application to silicate rocks has been limited. Impediments include volatilisation during silicate dissolution and contamination during chemical purification. To address this, we present a low-blank sample preparation procedure that couples hydrofluoric acid-digestion and low-temperature evaporation (mannitol-free), to an established MC-ICP-MS measurement procedure following chemical purification using B-specific Amberlite IRA 743 resin. We obtain accurate δ11BSRM 951 values (intermediate precision ±0.2‰) for boric acid (BAM ERM-AE121 19.65 ± 0.14‰) and carbonate (NIST RM 8301 (Coral) 24.24±0.11‰) reference materials. For silicate reference materials covering mafic to felsic compositions we obtain δ11BSRM 951 with intermediate precision < ±0.6‰ (2s), namely JB-2 6.9 ± 0.4‰; IAEA-B-5 -6.0 ± 0.6‰; IAEA-B-6 -3.9 ± 0.5‰; 2s. Furthermore, splits of these same reference materials were processed by an alternative fusion and purification procedure. We find agreement excellent agreement between δ11BSRM 951 measurement results by MC-ICP-MS of the reference materials using both sample processing techniques. These measurement results show that our sample processing and MC-ICP-MS methods provide consistent δ11BSRM 951 values for low B-mass fraction samples. We present new data from Mid Ocean Ridge Basalt (MORB) glass, documenting a range in δ11BSRM 951 from -5.6±0.3‰ to -8.8±0.5‰ (2s), implying some upper mantle δ11BSRM 951 heterogeneity.",

keywords = "δ11BSRM 951, MORB volcanic glass, OIB volcanic glass, Silicate reference materials, MC-ICP-MS, HF digestion, Boron isotopes",

author = "Paul, {Andr{\'e} N.} and Stewart, {Joseph A.} and Samuele Agostini and Kirstein, {Linda A.} and {De Hoog}, {Jan C.M.} and Savov, {Ivan P.} and Kristina Walowski and Rae, {James W.B.} and Tim Elliott",

note = "This study received support from the National Environmental Research Council grant NE/M000443/1 awarded to LK, Grant NE/N011716/1 to J.W.B.R., and IGG-CNR grant P1600514 awarded to SA. ",

year = "2023",

month = oct,

day = "4",

doi = "10.1111/ggr.12527",

language = "English",

volume = "Early View",

journal = "Geostandards and Geoanalytical Research",

issn = "1639-4488",

publisher = "John Wiley & Sons, Ltd",

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TY - JOUR

T1 - Refining boron isotopic measurements of silicate samples by multi-collector-inductively coupled plasma-mass spectrometry (MC-ICP-MS)

AU - Paul, André N.

AU - Stewart, Joseph A.

AU - Agostini, Samuele

AU - Kirstein, Linda A.

AU - De Hoog, Jan C.M.

AU - Savov, Ivan P.

AU - Walowski, Kristina

AU - Rae, James W.B.

AU - Elliott, Tim

N1 - This study received support from the National Environmental Research Council grant NE/M000443/1 awarded to LK, Grant NE/N011716/1 to J.W.B.R., and IGG-CNR grant P1600514 awarded to SA.

PY - 2023/10/4

Y1 - 2023/10/4

N2 - Solution MC-ICP-MS is an established technique for high precision boron isotope measurement results (δ11BSRM 951) in carbonates, yet its application to silicate rocks has been limited. Impediments include volatilisation during silicate dissolution and contamination during chemical purification. To address this, we present a low-blank sample preparation procedure that couples hydrofluoric acid-digestion and low-temperature evaporation (mannitol-free), to an established MC-ICP-MS measurement procedure following chemical purification using B-specific Amberlite IRA 743 resin. We obtain accurate δ11BSRM 951 values (intermediate precision ±0.2‰) for boric acid (BAM ERM-AE121 19.65 ± 0.14‰) and carbonate (NIST RM 8301 (Coral) 24.24±0.11‰) reference materials. For silicate reference materials covering mafic to felsic compositions we obtain δ11BSRM 951 with intermediate precision < ±0.6‰ (2s), namely JB-2 6.9 ± 0.4‰; IAEA-B-5 -6.0 ± 0.6‰; IAEA-B-6 -3.9 ± 0.5‰; 2s. Furthermore, splits of these same reference materials were processed by an alternative fusion and purification procedure. We find agreement excellent agreement between δ11BSRM 951 measurement results by MC-ICP-MS of the reference materials using both sample processing techniques. These measurement results show that our sample processing and MC-ICP-MS methods provide consistent δ11BSRM 951 values for low B-mass fraction samples. We present new data from Mid Ocean Ridge Basalt (MORB) glass, documenting a range in δ11BSRM 951 from -5.6±0.3‰ to -8.8±0.5‰ (2s), implying some upper mantle δ11BSRM 951 heterogeneity.

AB - Solution MC-ICP-MS is an established technique for high precision boron isotope measurement results (δ11BSRM 951) in carbonates, yet its application to silicate rocks has been limited. Impediments include volatilisation during silicate dissolution and contamination during chemical purification. To address this, we present a low-blank sample preparation procedure that couples hydrofluoric acid-digestion and low-temperature evaporation (mannitol-free), to an established MC-ICP-MS measurement procedure following chemical purification using B-specific Amberlite IRA 743 resin. We obtain accurate δ11BSRM 951 values (intermediate precision ±0.2‰) for boric acid (BAM ERM-AE121 19.65 ± 0.14‰) and carbonate (NIST RM 8301 (Coral) 24.24±0.11‰) reference materials. For silicate reference materials covering mafic to felsic compositions we obtain δ11BSRM 951 with intermediate precision < ±0.6‰ (2s), namely JB-2 6.9 ± 0.4‰; IAEA-B-5 -6.0 ± 0.6‰; IAEA-B-6 -3.9 ± 0.5‰; 2s. Furthermore, splits of these same reference materials were processed by an alternative fusion and purification procedure. We find agreement excellent agreement between δ11BSRM 951 measurement results by MC-ICP-MS of the reference materials using both sample processing techniques. These measurement results show that our sample processing and MC-ICP-MS methods provide consistent δ11BSRM 951 values for low B-mass fraction samples. We present new data from Mid Ocean Ridge Basalt (MORB) glass, documenting a range in δ11BSRM 951 from -5.6±0.3‰ to -8.8±0.5‰ (2s), implying some upper mantle δ11BSRM 951 heterogeneity.

KW - δ11BSRM 951

KW - MORB volcanic glass

KW - OIB volcanic glass

KW - Silicate reference materials

KW - MC-ICP-MS

KW - HF digestion

KW - Boron isotopes

U2 - 10.1111/ggr.12527

DO - 10.1111/ggr.12527

M3 - Article

SN - 1639-4488

VL - Early View

JO - Geostandards and Geoanalytical Research

JF - Geostandards and Geoanalytical Research

ER -

Refining boron isotopic measurements of silicate samples by multi-collector-inductively coupled plasma-mass spectrometry (MC-ICP-MS)

Abstract

Keywords

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INTRIGUED: Investigating the role of the: INTRIGUED: Investigating The Role of the North Pacific in Glacial and Deglacial CO2 and Climate

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