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First Steps with the Fluorescence Detector
2
1100 Series FD Reference Manual
31
Optimization Overview
1
Setting the right PMT value
For most applications a setting of 10 is adequate. The G1321A A/D
converter exhibits a large linear range making PMT switching unnecessary
for most applications. For example, if at high concentrations a peak is cut
off; decrease the PMT setting. Remember that low PMT settings decrease the
signal to noise ratio.
The built-in PMT gain test uses the parameters in the detector. When using
the PMT gain test, the wavelength setting and lamp energy mode
(depending on Multiwavelength-Mode and Lamp-Economy) will affect the
pmt gain calculation.
2
Using an appropriate response time
For most applications a setting of 4 seconds is adequate. Only for high
speed analyses (short columns at high flow rates) a lower setting is
recommended. Bear in mind that even if the response time is too high fast
peaks will appear a little smaller and broader but retention time and peak
areas are still correct and reproducible.
3
Finding the optimum wavelength
Most fluorescent active molecules absorb at 230 nm. Set the excitation
wavelength to 230 nm and on-line scan the emission spectra
(multi-emission mode). Then set the determined emission wavelength and
perform a multi-excitation scan (multi-excitation mode) to find the best
excitation wavelength.
N O T E
If you have changed one or more parameter(s), you have to press 'OK' to write down the
new settings into the FLD. Then re-enter 'FLD-Signals' and start the PMT gain test.
Содержание 1100 Series
Страница 1: ...s1 Agilent 1100 Series Fluorescence Detector Reference Manual Agilent G1321A Asset 304025 ...
Страница 12: ...12 1100 Series FD Reference Manual ...
Страница 58: ...60 1100 Series FD Reference Manual 2 First Steps with the Fluorescence Detector ...
Страница 126: ...128 1100 Series FD Reference Manual 4 Troubleshooting and Test Functions ...
Страница 260: ...262 1100 Series FD Reference Manual 7 Introduction to the Fluorescence Detector ...
Страница 324: ...326 1100 Series FD Reference Manual 9 Introduction to the Control Module ...
Страница 340: ...342 1100 Series FD Reference Manual A Safety Information ...
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