PerkinElmer AVIO 200, Hardware Manual

Page: 284 / 309

Troubleshooting
282
Cannot get suggested
detection limits The sample introduction
system may not be set up
correctly, or may require
maintenance. Refer to Chapter 4, Maintenance .
The BEC may be high. Run the BEC test. Refer to the
Syngistix Software Guide on the
Syngistix Document Pack CD for
details
.
Look for carryover – check if
concentrations for the sample
replicates increase from one to
the next. Increase the Read Delay to flush the
sample introduction system completely.
Refer to the Syngistix Software Guide
on the Syngistix Document Pack CD
for details
.
The standard and blank may
need to be matrix-matched. Prepare the standard and blank in the
same acid matrix used for the samples.
The integration time may be
too short. Increase the minimum and maximum
times for integration. Refer to the
Syngistix Software Guide on the
Syngistix Document Pack CD for
details
.
Cannot get suggested
detection limits
(continued) The standard may have too
high a concentration. Dilute the standard to approximate the
anticipated concentration of samples.
You may not be comparing the
appropriate value for the
wavelength you are using. Confirm that you are using the
appropriate wavelength and recheck
the value. Refer to the Syngistix
Software Guide on the Syngistix
Document Pack CD for details
.
General performance
problems Performance problems such as
poor precision or loss of signal
can often be traced to the setup
and condition of the sample
introduction system. See the section Checking the Sample
Introduction System on page 276.
Table 6-1. Performance Problems: Troubleshooting Table