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Interference-free electron probe micro-analysis of bromine in halogen-bearing minerals and glasses: high-resolution measurements and quantitative elemental mapping
We present a new approach for using EPMA for Br quantification in halogen-bearing minerals and glasses by measuring the interference-free Br Kα X-ray signal (11.909 keV), using a lithium fluoride (LiF) diffracting crystal. A set of Br-doped glasses as well as Cl- and Br-bearing scapolite-group minerals that were previously characterized by SIMS, INAA, LAICPMS, EPMA, and the Noble Gas Method, is compared to new EPMA measurements. Bromine concentrations in the tested samples range from ∼10 to ∼3500 μg g-1 and our study shows that estimated limit of quantifications of ∼120 μg g-1 Br and ∼15 μg g-1 of Cl can be rea...
Source: Journal of Analytical Atomic Spectrometry - November 28, 2023 Category: Chemistry Authors: Johannes Hammerli Scott Boroughs Source Type: research

Platinum-group elements and gold in silver coinage and the issue of salt cementation
J Anal At Spectrom. 2023 Sep 14;38(10):2159-2166. doi: 10.1039/d3ja00112a. eCollection 2023 Oct 4.ABSTRACTIt has been proposed that gold purification by cementation could account for the low gold content of ancient Greek coinage from Attica and the Cyclades. In order to place new constraints on this suggestion, the concentrations of platinum-group elements (PGEs) and gold have been measured in 72 silver coins mostly from the Greek Archaic and Classical periods, but also from Rome, India, medieval Europe, and colonial Spanish Americas, by inductively coupled plasma mass spectrometry. A novel technique allowing these concent...
Source: Journal of Analytical Atomic Spectrometry - November 28, 2023 Category: Chemistry Authors: Francis Albar ède Chlo é Malod-Dognin Philippe T élouk Source Type: research

High spatial resolution (10-50 μm) analysis of Sr isotopes in rock-forming apatite by LA-MC-ICP-MS
We present a new routine procedure for analysing rock-forming apatites with a Thermo Scientific Neptune XT MC-ICP-MS coupled with a Teledyne Cetac Analyte Excite+ 193 nm laser ablation system. Five apatite standards that cover a large range of REE/Sr ratios were selected, and their 87Sr/86Sr ratios were measured in solution after dissolution and purification of Sr [Durango: 0.706321(5); Madagascar: 0.711814(5); Slyudyanka; 0.707705(4); Sumé: 0.707247(4); and Ipirá: 0.710487(4)]. The optimisation of both instrument setup and data reduction schemes was achieved through repeated measurements of calibration solutions and of ...
Source: Journal of Analytical Atomic Spectrometry - November 28, 2023 Category: Chemistry Authors: Anda Buzenchi Hugo Moreira Olivier Bruguier Delphine Bosch Bruno Dhuime Source Type: research

Interference-free electron probe micro-analysis of bromine in halogen-bearing minerals and glasses: high-resolution measurements and quantitative elemental mapping
We present a new approach for using EPMA for Br quantification in halogen-bearing minerals and glasses by measuring the interference-free Br Kα X-ray signal (11.909 keV), using a lithium fluoride (LiF) diffracting crystal. A set of Br-doped glasses as well as Cl- and Br-bearing scapolite-group minerals that were previously characterized by SIMS, INAA, LAICPMS, EPMA, and the Noble Gas Method, is compared to new EPMA measurements. Bromine concentrations in the tested samples range from ∼10 to ∼3500 μg g-1 and our study shows that estimated limit of quantifications of ∼120 μg g-1 Br and ∼15 μg g-1 of Cl can be rea...
Source: Journal of Analytical Atomic Spectrometry - November 28, 2023 Category: Chemistry Authors: Johannes Hammerli Scott Boroughs Source Type: research

Platinum-group elements and gold in silver coinage and the issue of salt cementation
J Anal At Spectrom. 2023 Sep 14;38(10):2159-2166. doi: 10.1039/d3ja00112a. eCollection 2023 Oct 4.ABSTRACTIt has been proposed that gold purification by cementation could account for the low gold content of ancient Greek coinage from Attica and the Cyclades. In order to place new constraints on this suggestion, the concentrations of platinum-group elements (PGEs) and gold have been measured in 72 silver coins mostly from the Greek Archaic and Classical periods, but also from Rome, India, medieval Europe, and colonial Spanish Americas, by inductively coupled plasma mass spectrometry. A novel technique allowing these concent...
Source: Journal of Analytical Atomic Spectrometry - November 28, 2023 Category: Chemistry Authors: Francis Albar ède Chlo é Malod-Dognin Philippe T élouk Source Type: research

High spatial resolution (10-50 μm) analysis of Sr isotopes in rock-forming apatite by LA-MC-ICP-MS
We present a new routine procedure for analysing rock-forming apatites with a Thermo Scientific Neptune XT MC-ICP-MS coupled with a Teledyne Cetac Analyte Excite+ 193 nm laser ablation system. Five apatite standards that cover a large range of REE/Sr ratios were selected, and their 87Sr/86Sr ratios were measured in solution after dissolution and purification of Sr [Durango: 0.706321(5); Madagascar: 0.711814(5); Slyudyanka; 0.707705(4); Sumé: 0.707247(4); and Ipirá: 0.710487(4)]. The optimisation of both instrument setup and data reduction schemes was achieved through repeated measurements of calibration solutions and of ...
Source: Journal of Analytical Atomic Spectrometry - November 28, 2023 Category: Chemistry Authors: Anda Buzenchi Hugo Moreira Olivier Bruguier Delphine Bosch Bruno Dhuime Source Type: research

Interference-free electron probe micro-analysis of bromine in halogen-bearing minerals and glasses: high-resolution measurements and quantitative elemental mapping
We present a new approach for using EPMA for Br quantification in halogen-bearing minerals and glasses by measuring the interference-free Br Kα X-ray signal (11.909 keV), using a lithium fluoride (LiF) diffracting crystal. A set of Br-doped glasses as well as Cl- and Br-bearing scapolite-group minerals that were previously characterized by SIMS, INAA, LAICPMS, EPMA, and the Noble Gas Method, is compared to new EPMA measurements. Bromine concentrations in the tested samples range from ∼10 to ∼3500 μg g-1 and our study shows that estimated limit of quantifications of ∼120 μg g-1 Br and ∼15 μg g-1 of Cl can be rea...
Source: Journal of Analytical Atomic Spectrometry - November 28, 2023 Category: Chemistry Authors: Johannes Hammerli Scott Boroughs Source Type: research

Platinum-group elements and gold in silver coinage and the issue of salt cementation
J Anal At Spectrom. 2023 Sep 14;38(10):2159-2166. doi: 10.1039/d3ja00112a. eCollection 2023 Oct 4.ABSTRACTIt has been proposed that gold purification by cementation could account for the low gold content of ancient Greek coinage from Attica and the Cyclades. In order to place new constraints on this suggestion, the concentrations of platinum-group elements (PGEs) and gold have been measured in 72 silver coins mostly from the Greek Archaic and Classical periods, but also from Rome, India, medieval Europe, and colonial Spanish Americas, by inductively coupled plasma mass spectrometry. A novel technique allowing these concent...
Source: Journal of Analytical Atomic Spectrometry - November 28, 2023 Category: Chemistry Authors: Francis Albar ède Chlo é Malod-Dognin Philippe T élouk Source Type: research

High spatial resolution (10-50 μm) analysis of Sr isotopes in rock-forming apatite by LA-MC-ICP-MS
We present a new routine procedure for analysing rock-forming apatites with a Thermo Scientific Neptune XT MC-ICP-MS coupled with a Teledyne Cetac Analyte Excite+ 193 nm laser ablation system. Five apatite standards that cover a large range of REE/Sr ratios were selected, and their 87Sr/86Sr ratios were measured in solution after dissolution and purification of Sr [Durango: 0.706321(5); Madagascar: 0.711814(5); Slyudyanka; 0.707705(4); Sumé: 0.707247(4); and Ipirá: 0.710487(4)]. The optimisation of both instrument setup and data reduction schemes was achieved through repeated measurements of calibration solutions and of ...
Source: Journal of Analytical Atomic Spectrometry - November 28, 2023 Category: Chemistry Authors: Anda Buzenchi Hugo Moreira Olivier Bruguier Delphine Bosch Bruno Dhuime Source Type: research

Interference-free electron probe micro-analysis of bromine in halogen-bearing minerals and glasses: high-resolution measurements and quantitative elemental mapping
We present a new approach for using EPMA for Br quantification in halogen-bearing minerals and glasses by measuring the interference-free Br Kα X-ray signal (11.909 keV), using a lithium fluoride (LiF) diffracting crystal. A set of Br-doped glasses as well as Cl- and Br-bearing scapolite-group minerals that were previously characterized by SIMS, INAA, LAICPMS, EPMA, and the Noble Gas Method, is compared to new EPMA measurements. Bromine concentrations in the tested samples range from ∼10 to ∼3500 μg g-1 and our study shows that estimated limit of quantifications of ∼120 μg g-1 Br and ∼15 μg g-1 of Cl can be rea...
Source: Journal of Analytical Atomic Spectrometry - November 28, 2023 Category: Chemistry Authors: Johannes Hammerli Scott Boroughs Source Type: research

Platinum-group elements and gold in silver coinage and the issue of salt cementation
J Anal At Spectrom. 2023 Sep 14;38(10):2159-2166. doi: 10.1039/d3ja00112a. eCollection 2023 Oct 4.ABSTRACTIt has been proposed that gold purification by cementation could account for the low gold content of ancient Greek coinage from Attica and the Cyclades. In order to place new constraints on this suggestion, the concentrations of platinum-group elements (PGEs) and gold have been measured in 72 silver coins mostly from the Greek Archaic and Classical periods, but also from Rome, India, medieval Europe, and colonial Spanish Americas, by inductively coupled plasma mass spectrometry. A novel technique allowing these concent...
Source: Journal of Analytical Atomic Spectrometry - November 28, 2023 Category: Chemistry Authors: Francis Albar ède Chlo é Malod-Dognin Philippe T élouk Source Type: research

Reduction of surface charging effects in laser ablation ionisation mass spectrometry through gold coating
J Anal At Spectrom. 2023 May 23;38(7):1372-1378. doi: 10.1039/d3ja00078h. eCollection 2023 Jul 5.ABSTRACTIn femtosecond Laser Ablation Ionisation Mass Spectrometry (fs-LIMS) short laser pulses are used to ablate, atomise, and ionise solid sample material shot-by-shot. When ablating non-conductive samples electric charging of the surface can occur. Depending on the geometry of the instrument, the surface charge can influence the spread of the ablation plume and reduce spectral quality. Methods to reduce surface charging were investigated using a non-conductive geological sample and a miniature fs-LIMS system with a co-linea...
Source: Journal of Analytical Atomic Spectrometry - July 7, 2023 Category: Chemistry Authors: Salome Gruchola Andreas Riedo Peter Keresztes Schmidt Coenraad P de Koning Luca N Knecht Marek Tulej Frances Westall Peter Wurz Source Type: research

Reduction of surface charging effects in laser ablation ionisation mass spectrometry through gold coating
J Anal At Spectrom. 2023 May 23;38(7):1372-1378. doi: 10.1039/d3ja00078h. eCollection 2023 Jul 5.ABSTRACTIn femtosecond Laser Ablation Ionisation Mass Spectrometry (fs-LIMS) short laser pulses are used to ablate, atomise, and ionise solid sample material shot-by-shot. When ablating non-conductive samples electric charging of the surface can occur. Depending on the geometry of the instrument, the surface charge can influence the spread of the ablation plume and reduce spectral quality. Methods to reduce surface charging were investigated using a non-conductive geological sample and a miniature fs-LIMS system with a co-linea...
Source: Journal of Analytical Atomic Spectrometry - July 7, 2023 Category: Chemistry Authors: Salome Gruchola Andreas Riedo Peter Keresztes Schmidt Coenraad P de Koning Luca N Knecht Marek Tulej Frances Westall Peter Wurz Source Type: research

Reduction of surface charging effects in laser ablation ionisation mass spectrometry through gold coating
J Anal At Spectrom. 2023 May 23;38(7):1372-1378. doi: 10.1039/d3ja00078h. eCollection 2023 Jul 5.ABSTRACTIn femtosecond Laser Ablation Ionisation Mass Spectrometry (fs-LIMS) short laser pulses are used to ablate, atomise, and ionise solid sample material shot-by-shot. When ablating non-conductive samples electric charging of the surface can occur. Depending on the geometry of the instrument, the surface charge can influence the spread of the ablation plume and reduce spectral quality. Methods to reduce surface charging were investigated using a non-conductive geological sample and a miniature fs-LIMS system with a co-linea...
Source: Journal of Analytical Atomic Spectrometry - July 7, 2023 Category: Chemistry Authors: Salome Gruchola Andreas Riedo Peter Keresztes Schmidt Coenraad P de Koning Luca N Knecht Marek Tulej Frances Westall Peter Wurz Source Type: research

Reduction of surface charging effects in laser ablation ionisation mass spectrometry through gold coating
J Anal At Spectrom. 2023 May 23;38(7):1372-1378. doi: 10.1039/d3ja00078h. eCollection 2023 Jul 5.ABSTRACTIn femtosecond Laser Ablation Ionisation Mass Spectrometry (fs-LIMS) short laser pulses are used to ablate, atomise, and ionise solid sample material shot-by-shot. When ablating non-conductive samples electric charging of the surface can occur. Depending on the geometry of the instrument, the surface charge can influence the spread of the ablation plume and reduce spectral quality. Methods to reduce surface charging were investigated using a non-conductive geological sample and a miniature fs-LIMS system with a co-linea...
Source: Journal of Analytical Atomic Spectrometry - July 7, 2023 Category: Chemistry Authors: Salome Gruchola Andreas Riedo Peter Keresztes Schmidt Coenraad P de Koning Luca N Knecht Marek Tulej Frances Westall Peter Wurz Source Type: research