To aid in the positive identification of samples prepared
for the ion microprobe, to guard against their loss, and to aid us in searches for wayward
samples, we have adopted the following policy:
- All samples prepared for ion probe analysis must be
permanently labeled in an unambiguous fashion. At a minimum, the label must include
the name of the investigator and a unique sample name. It is also useful to mark an
orientation arrow that corresponds to the + y direction of the sample holder to facilitate
reproducible positioning of the sample. Marking samples by diamond scribing on the
back of the mount is rapid and effective. Note that any form of ink marking is
unreliable since the potential future use of solvents may remove even permanent ink.
A more elaborate method of labeling the sample involves placement of a printed
label within the epoxy resin as it is poured. It is most convenient if the internal
label is visible from the side of the mount since both the top and bottom of the mount are
generally abraded during the course of sample preparation (and the upper surface coated
with Au or C). A 3 inch long by 0.2 inch high label can be concentrically arranged
within the mount so that it will be easily viewed from the side.
- When not in use, samples must be stored in appropriate
containers that are labeled with (at a minimum) the name of the investigator and the name
of the sample.
- Long-term storage of samples in the laboratory (i.e., for a
period of time that exceeds a given analysis session) is not permitted.
- Prior to loading a sample into the ims 1270, an entry
must be made in the ims 1270 sample log. This log is permanently housed
with the laboratory (on the table of the ims1270 console) and may not be removed for any
reason.
- Prior to loading a sample into the ims 1270, an image of the sample surface
(printed out on 8.5 x 11" paper and suitably punched for a three-ring binder) must be
inserted in the ims 1270 sample image repository. This image must be labeled with (at a
minimum) the name of the investigator, a unique sample name, and an orientation
arrow. This repository of sample images is permanently housed with the laboratory
(on the shelves above the PC) and neither it (nor its contents) may not be removed for any
reason.
|
