@article{fdi:010065968,
  title = {{D}evelopment of laser ablation multi-collector inductively coupled plasma mass spectrometry for boron isotopic measurement in marine biocarbonates : new improvements and application to a modern {P}orites coral},
  author = {{T}hil, {F}. and {B}lamart, {D}. and {A}ssailly, {C}. and {L}azareth, {C}laire {E}. and {L}eblanc, {T}. and {B}utscher, {J}ohn and {D}ouville, {E}.},
  editor = {},
  language = {{ENG}},
  abstract = {{R}ationale: {L}aser {A}blation coupled to {M}ulti-{C}ollector {I}nductively {C}oupled {P}lasma {M}ass {S}pectrometry ({LA}-{MC}-{ICPMS}) is a powerful tool for the high-precision measurement of the isotopic ratios of many elements in geological samples, with the isotope ratio (11{B}/10{B}) of boron being used as an indicator of the p{H} of oceanic waters. {M}ost geological samples or standards are polished and ablation occurs on flat surfaces. {H}owever, the shape and the irregularities of marine biocarbonates (e.g., corals, foraminifera) can make precise isotopic measurements of boron difficult. {E}ven after polishing, the porosity properties and the presence of holes or micro-fractures affect the signal and the isotopic ratio when ablating the material, especially in raster mode. {M}ethods: {T}he effect of porosity and of the crater itself on the 11{B} signal and the isotopic ratio acquired by {LA}-{MC}-{ICPMS} in both raster and spot mode was studied. {C}haracterization of the craters was then performed with an optical profilometer to determine their shapes and depths. {S}urface state effects were examined by analyzing the isotopic fractionation of boron in silicate ({NIST}-{SRM} 612 and 610 standards) and in carbonate (corals). {R}esults: {S}urface irregularities led to a considerable loss of signal when the crater depth exceeded 20 µm. {T}he stability and precision were degraded when ablation occurred in a deep cavity. {T}he effect of laser focusing and of blank correction was also highlighted and our observations indicate that the accuracy of the boron isotopic ratio does not depend on the shape of the surface. {A}fter validation of the analytical protocol for boron isotopes, a raster application on a {P}orites coral, which grew for 18 months in an aquarium after field sampling, was carried out. {C}onclusions: {T}his original {LA}-{MC}-{ICPMS} study revealed a well-marked boron isotope ratio temporal variability, probably related to growth rate and density changes, irrespective of the p{H} of the surrounding seawater.},
  keywords = {{NOUVELLE} {CALEDONIE}},
  booktitle = {},
  journal = {{R}apid {C}ommunications in {M}ass {S}pectrometry},
  volume = {30},
  numero = {3},
  pages = {359--371},
  ISSN = {1097-0231},
  year = {2016},
  DOI = {10.1002/rcm.7448},
  URL = {https://www.documentation.ird.fr/hor/fdi:010065968},
}