Hand-held XRF standard analyses. Hand-held XRF internally calibrated uncertainty for analysed samples. Calculated uncertainty is based on the combined.
Mochras core Cardigan Bay Basin, Wales, UK δ13CTOC[‰] -29
Calculated uncertainty is based on the combined HH-XRF internally calibrated uncertainty on sample analyses, and the uncertainty (1-St. Dev.) on multiple standard measurements. Standard deviation (1-St. Dev.) on multiple samples in selected stratigraphic intervals. Standard deviation (1-St. Dev.) on the positive and negative envelopes of the calculated uncertainty (grey-shaded area), for selected stratigraphic intervals.
Si [%] Ti [ppm] Rb [ppm] Zr [ppm] Al [%]
NIST 2711 - A NIST 2711 - A NIST 2711 - A NIST 2710 - A NIST 2710 - A
(n = 38) (n = 38) (n = 38) (n = 33) (n = 33)
Measured Average 17.44 3053 114.0 220.0 5.41
STDEV 0.29 81 1.0 3.7 0.12
Hand-held XRF internally calibrated uncertainty for analysed samples HH-XRF Internal calibrated uncertainty Si 0.04–0.08 Ti 0.007–0.009 Rb 0.0001 Zr 0.0001–0.0002 Al 0.05–0.07
