Ann: Grants Iron Ore Basin Drilling Commencing Soon, page-36

Im Not a geo Lotirish but they explain I think that they check againt "Certified iron standards" before and after each session, what does that mean ??? Im not sure but sounds like a calibration of some sort
Quality of assay
data and
laboratory tests
•
Handheld XRF readings were collected using a Niton XL3t 500 unit.
•
15 second XRF
readings were collected by analysing through the lower and upper parts of the one
metre plastic bagged bulk samples. The two readings for each metre interval were then averaged,
resulting in a single analysis for each metre.
•
Certified iron standards were
analysed at the start of each session to check the accuracy of the XRF
unit.
Verification of
drilling sampling
and assaying
•
Certified iron standards were analysed at the start of each session to check the accuracy of the XRF
unit.
•
Ongoing assessment of ha
ndheld XRF results using laboratory certified iron standards and analysis of
earlier Maldorky Iron Project handheld Niton XRF versus laboratory assay results has shown that
analysing through the heavy
-
duty plastic bulk sample bags (200μm thickness) does ha
ve a reducing
effect on handheld Niton XRF results. Multiple and ongoing tests has shown that there is a 10
-
20%
difference between analysing a sample directly versus analysing the standard through a 200μm
thickness plastic bulk sample bag. Therefore, the
reported uncorrected Niton XRF results are
regarded as being conservative, i.e. laboratory assay results are likely to return higher grades.
•
All data entry is under control of an experienced geologist, who is responsible for data management,
storage and security.

Any news thats not bad new is good news I reckon