
LS 6000 Scintillation System User’s Manual
PN 247971-F
5-5
Data Calculation
SL CPM % of Reference/Xtal SL CPM % of Reference
5
If you are using replicates, the replicates must be loaded in adjacent positions. To indicate
that one or more replicates are missing from a group, leave only one empty position; the
system recognizes the vial following the empty space as being the first replicate of the next
set.
NOTE Do not leave an empty space for each missing replicate. One empty space indicates to the system that
a new group of replicates follows.
Results for CPM/Xtal CPM
To count the samples, refer to Section 3.2. A typical printout for CPM in standard format is
shown in Figure 5.3.
5.3 SL CPM % of Reference/Xtal SL CPM % of Reference
The Single Label CPM % of Reference program is used for any type of single label experiment
that requires dividing each of the unknowns by a reference, yielding a percent value. Blanks
and backgrounds can be subtracted if selected in the User Program.
Setting Up SL CPM % of Reference! Xtal SL CPM % of Reference
When editing a User Program, from the Data Calculation Menu (Figure 5.1), choose “SL
CPM %REF’ or ‘XTAL SL CPM %REF”. The prompts displayed on the menu when either
program is selected are the same as described for the CPM program. Refer to Setting Up
Figure 5.3 Typical Printout for CPM in Standard Format.
% Ref
Sample CPM - Blank CPM x 100 x Factor
Reference CPM - Blank CPM
=
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