Online Resources
Standard Reference Materials for isotopic analysis
While interpretations come and go, good data always stand the test of time…..
As part of our commitment to the highest possible standards of data quality we contribute wherever possible to the characterisation of international Standard Reference Materials. Here are some of these data for use in a variety of analytical situations:
(click on an item to be taken there)
Pb-isotope data for USGS SRM's
Pb, Sr, Nd-isotope data for NIST glasses
Pb-isotope data for MPI-DING glasses
Hf-isotope data for zircon standards
Pb-isotope data for USGS SRM's
TIMS double-spike corrected Pb-isotope data for USGS reference materials
| USGS SRM |
206/204 |
207/204 |
208/204 |
| |
|
|
|
| BHVO-1 |
18.689 |
15.568 |
38.337 |
| (sd, n=4) |
0.010 |
0.002 |
0.002 |
| |
|
|
|
| BHVO-2 |
18.641 |
15.538 |
38.228 |
| (sd, n=4) |
0.011 |
0.009 |
0.026 |
| |
|
|
|
| AGV-1 |
18.945 |
15.659 |
38.560 |
| (sd, n=5) |
0.007 |
0.007 |
0.018 |
| |
|
|
|
| AGV-2 |
18.864 |
15.609 |
38.511 |
| (sd, n=4) |
0.007 |
0.006 |
0.020 |
| |
|
|
|
| BCR-1 |
18.814 |
15.630 |
38.703 |
| (sd, n=3) |
0.006 |
0.005 |
0.015 |
| |
|
|
|
| BCR-2 |
18.750 |
15.615 |
38.691 |
| (sd, n=4) |
0.011 |
0.003 |
0.021 |
all data reported relative to the following values for NIST SRM 981: 206/204 = 16.937, 207/204 = 15.491, 208/204 = 36.700. See Woodhead & Hergt (2000) Geostandards 24, 33-38 for further details.
Pb, Sr, Nd-isotope data for NIST glasses
| SRM |
206/204 |
207/204 |
208/204 |
87/86 |
143/144 |
| |
|
|
|
|
|
| NIST 610 |
17.047 |
15.509 |
36.975 |
0.709699 |
0.511927 |
| (2sd, n=4) |
0.0018 |
0.0010 |
0.0026 |
0.000018 |
0.000004 |
| |
|
|
|
|
|
| NIST 612 |
17.094 |
15.510 |
37.000 |
0.709063 |
0.511930 |
| (2sd, n=4) |
0.0026 |
0.0036 |
0.0094 |
0.000020 |
0.000004 |
| |
|
|
|
|
|
| NIST 614 |
17.833 |
15.533 |
37.472 |
0.708363 |
0.511920 |
| (2sd, n=4) |
0.0134 |
0.0066 |
0.0214 |
0.000022 |
0.000006 |
standards run concurrently provide the following values. NIST SRM 981 Pb: 206/204=16.935, 207/204=15.492, 208/204=36.702; NIST SRM 987 Sr: 87/86=0.710276; La Jolla Nd: 143/144=0.511875. See Woodhead & Hergt (2001) Geostandards 25, 261-266.
Pb-isotope data for MPI-DING glasses
| glass std |
206/204 |
207/204 |
208/204 |
208/206 |
207/206 |
| |
|
|
|
|
|
| GOR 128 |
18.510 |
15.618 |
38.256 |
2.066834 |
0.843767 |
| ML3B |
18.695 |
15.584 |
38.397 |
2.053826 |
0.833580 |
| KL2G |
19.026 |
15.628 |
38.507 |
2.023908 |
0.821407 |
| ATHO-G |
18.375 |
15.473 |
38.087 |
2.072693 |
0.842047 |
| StH6 |
18.894 |
15.609 |
38.496 |
2.037518 |
0.826143 |
| T1G |
18.725 |
15.675 |
38.953 |
2.080291 |
0.837147 |
| GOR 132 |
19.245 |
15.712 |
38.688 |
2.010327 |
0.816437 |
standards run concurrently
| SRM 981 |
16.935 |
15.489 |
36.696 |
2.166916 |
0.914609 |
| |
16.936 |
15.492 |
36.705 |
2.167224 |
0.914697 |
| SRM 610 |
17.048 |
15.510 |
36.979 |
2.169141 |
0.909795 |
| SRM 612 |
17.094 |
15.509 |
36.999 |
2.164387 |
0.907255 |
| |
17.094 |
15.508 |
37.000 |
2.164474 |
0.907250 |
See Jochum et al. G-cubed, in press for further details. Note the compilation data in the aforementioned publication may differ slightly from the data quoted above as they have been re-normalised to the MPI preferred values for NIST SRM 981, which differ slightly from those used at Melbourne University.
Hf-isotope data for zircon standards
solution MC-ICPMS data for Hf separated from zircons by ion exchange chemistry. Being free from Yb and Lu isobaric interferences these data provide benchmark values for in situ laser ablation analyses:
| zircon |
176Hf/177Hf |
| |
|
| 91500 |
0.282306 |
| |
|
| BR266 |
0.281630 |
| |
|
| Temora-2 |
0.282686 |
| |
|
| FC-1 |
0.282184 |
| |
|
| QGNG |
0.281612 |
| |
|
| Monastery |
0.282738 |
| |
|
| Mud Tank |
0.282507 |
see Woodhead & Hergt (2005) Geostandards 29, 183-195 for further details
|
