You may want to contact Petrus Le Roux at DTM of the Carnegie Institution.
He has been doing a lot of development work on laser ablation measurement
of B isotopic composition in basaltic glasses, but he may also know of some
reliable standard reference materials for B concentration measurements.
His email is [log in to unmask] (or [log in to unmask])
> Does anyone know of a solid standard (or standards), homogeneous
>with respect to boron and with accurately known boron concentration? It
>should preferably be a silicate glass or rock melt. Boron levels in the
>tens or hundreds of ppm rather than percent level would be preferred.
> We are not convinced the Pearce NIST610 and 612 values are
>accurate. Quite apart from homogeneity - (has anyone seen Steve Eggins' and
>my Geostandards Newsletter paper on inhomogeneity in the NIST glasses - we
>were expecting a storm of protest, but so far not a thing?) - if one
>standard is used to calibrate for the other, one of them must be wrong.
>One of our PhD students is searching for something he can hang his hat on,
>but if we fuse any of the well characterised rock standards to glass we
>will almost certainly lose some of the boron, making them useless. Does
>anyone have a value for the BCR2-G glass (that too is heterogeneous with
>respect to boron, by the way) they feel they can trust?
> I know boron is rightly regarded as an analytical pest (long
>washout times etc.) but we can't be the only ones mad enough to measure it
Philip E. Janney, Ph.D.
Manager, Isotope Geochemistry Laboratory
Department of Geology
The Field Museum of Natural History
1400 S. Lake Shore Drive
Chicago, IL 60605, USA
Phone: 312-665-7099 (office), -7613 (mass spec lab), -7617 (clean lab)
Email: [log in to unmask]