@article{fdi:010053129,
  title = {{P}recise determination of silicon isotopes in silicate rock reference materials by {MC}-{ICP}-{MS}},
  author = {{Z}ambardi, {T}. and {P}oitrasson, {F}ranck},
  editor = {},
  language = {{ENG}},
  abstract = {{A} {HF}-free sample preparation method was used to purify silicon in twelve geological {RM}s. {S}ilicon isotope compositions were determined using a {N}eptune instrument multi-collector-{ICP}-{MS} in high-resolution mode, which allowed separation of the silicon isotope plateaus from their interferences. {A} 1 mu g g-1 {M}g spike was added to each sample and standard solution for online mass bias drift correction. delta 30{S}i and delta 29{S}i values are expressed in per mil (parts per thousand), relative to the {NIST} {SRM} 8546 ({NBS}-28) international isotopic {RM}. {T}he total variation of delta 30{S}i in the geological reference samples analysed in this study ranged from -0.13 parts per thousand to -0.29 parts per thousand. {C}omparison with delta 29{S}i values shows that these isotopic fractionations were mass dependent. {IRMM}-17 yielded a delta 30{S}i value of -1.41 +/- 0.07 parts per thousand (2s, n = 12) in agreement with previous data. {T}he long-term reproducibility for natural samples obtained on {BHVO}-2 yielded delta 30{S}i = -0.27 +/- 0.08 parts per thousand (2s, n = 42) on a 12 month time scale. {A}n in-house {S}i reference sample was produced to check for the long-term reproducibility of a mono-elemental sample solution; this yielded a comparable uncertainty of +/- 0.07 parts per thousand (2s, n = 24) over 5 months.{U}ne methode de digestion ne requerant pas l'emploi d'acide fluorhydrique ({HF}) a ete developpee pour purifier le silicium de douze materiaux de reference geologiques. {L}es signatures isotopiques du silicium ont ete determinees a l'aide d'un spectrometre de masse multi collecteurs a torche a plasma ({MC}-{ICP}-{MS}) {N}eptune en haute resolution, permettant de separer les plateaux des isotopes du silicium de leurs interferences. {L}es variations temporelles du biais de masse ont ete corrigees par standardisation interne, via l'addition de 1 mu g g-1 de magnesium dans les echantillons et les standards. {L}es valeurs delta, exprimees en pour mille (delta 30{S}i et delta 29{S}i), ont ete determinees relativement au materiel de reference isotopique international de silicium {NIST} {SRM} 8546 ({NBS}-28). {L}a variation totale du delta 30{S}i pour les materiaux de reference geologiques mesures dans cette etude s'echelonne de -0.13 parts per thousand a -0.29 parts per thousand. {L}a comparaison avec delta 29{S}i montre un fractionnement isotopique dependant de la masse. {N}ous obtenons pour {IRMM}-17 un delta 30{S}i = -1.41 +/- 0.07 parts per thousand (2s, n = 12), en accord avec les valeurs proposees anterieurement. {L}a reproductibilite externe sur le long terme pour les echantillons naturels a ete determinee par la mesure repetee de {BHVO}-2 (n = 42) sur une echelle de temps de 12 mois, donnant une valeur delta 30{S}i = -0.27 parts per thousand et une incertitude de +/- 0.08 parts per thousand (2s). {U}n materiel de reference maison ({IHRS}) a ete produit pour evaluer la reproductibilite sur le long terme d'une solution mono elementaire. {I}l donne une incertitude comparable de +/- 0.07 parts per thousand (2s, n = 24) sur 5 mois.},
  keywords = {{MC}-{ICP}-{MS} ; silicon ; isotopes ; geological {RM}s ; geochemistry ; {MC}-{ICP}-{MS} ; silicium ; isotopes ; materiaux de reference geologiques ; geochimie},
  booktitle = {},
  journal = {{G}eostandards and {G}eoanalytical {R}esearch},
  volume = {35},
  numero = {1},
  pages = {89--99},
  ISSN = {1639-4488},
  year = {2011},
  DOI = {10.1111/j.1751-908{X}.2010.00067.x},
  URL = {https://www.documentation.ird.fr/hor/fdi:010053129},
}