@article{fdi:010054158,
  title = {{I}nter-laboratory comparison of oxygen isotope compositions from biogenic silica},
  author = {{C}hapligin, {B}. and {L}eng, {M}. {J}. and {W}ebb, {E}. and {A}lexandre, {A}. and {D}odd, {J}. {P}. and {I}jiri, {A}. and {L}ucke, {A}. and {S}hemesh, {A}. and {A}belmann, {A}. and {H}erzschuh, {U}. and {L}ongstaffe, {F}. {J}. and {M}eyer, {H}. and {M}oschen, {R}. and {O}kazaki, {Y}. and {R}ees, {N}. {H}. and {S}harp, {Z}. {D}. and {S}loane, {H}. {J}. and {S}onzogni, {C}. and {S}wann, {G}. {E}. {A}. and {S}ylvestre, {F}lorence and {T}yler, {J}. {J}. and {Y}am, {R}.},
  editor = {},
  language = {{ENG}},
  abstract = {{S}everal techniques have been introduced in the last decades for the dehydration and release of {O}-2 from biogenic silica (opal-{A}) for oxygen-isotope analysis. {H}owever, only one silica standard is universally available: a quartz standard ({NBS}28) distributed by the {IAEA}, {V}ienna. {H}ence, there is a need for biogenic silica working standards. {T}his paper compares the existing methods of oxygen-isotope analyses of opal-{A} and aims to characterize additional possible working standards to calibrate the delta {O}-18 values of biogenic silica. {F}or this purpose, an inter-laboratory comparison was organized. {S}ix potential working standard materials were analysed repeatedly against {NBS}28 by eight participating laboratories using their specific analytical methods. {T}he materials cover a wide range of delta {O}-18 values (+23 to +43 parts per thousand) and include diatoms (marine, lacustrine), phytoliths and synthetically-produced hydrous silica. {T}o characterize the proposed standards, chemical analyses and imaging by scanning electron microscopy ({SEM}) were also performed. {D}espite procedural differences at each laboratory, all methods are in reasonable agreement with a standard deviation ({SD}) for delta {O}-18 values between 0.3 parts per thousand and 0.9 parts per thousand (1 sigma). {B}ased on the results, we propose four additional biogenic silica working standards ({PS}1772-8: 42.8 parts per thousand; {BFC}: 29.0 parts per thousand; {MSG}60: 37.0 parts per thousand; {G}95-25-{CL} leaves: 36.6 parts per thousand) for delta {O}-18 analyses, available on request through the relevant laboratories.},
  keywords = {},
  booktitle = {},
  journal = {{G}eochimica et {C}osmochimica {A}cta},
  volume = {75},
  numero = {22},
  pages = {7242--7256},
  ISSN = {0016-7037},
  year = {2011},
  DOI = {10.1016/j.gca.2011.08.011},
  URL = {https://www.documentation.ird.fr/hor/fdi:010054158},
}