Dionex 043185, Руководство по эксплуатации продукта

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IonPacAS9-SC 034656-06 Page 22 of 28
IonPac AS9-SC
4-mm Columns
Part (P/N)
Analytical Column 043185
Guard Column 043186
Bed Support Assembly 042955
End Fitting 052809
CAUTION
If the column tube end is not clean when inserted into the end fitting, particulate matter may obstruct a proper seal
between the end of the column tube and the bed support assembly. If this is the case, additional tightening may
not seal the column but instead damage the column tube or the end fitting.
E. Screw the end fitting back onto the column. Tighten it fingertight, then an additional 1/4 turn (25 in x lb). Tighten
further only if leaks are observed.
F. Reconnect the column to the system and resume operation.
NOTE
Replace the outlet bed support ONLY if high pressure persists after replacement of the inlet fitting.
6.2 High Background Or Noise
In a properly working system, the background conductivity level for the standard eluent system is shown below:
ELUENT EXPECTED BACKGROUND CONDUCTIVITY
1.8 mM Na
2
CO
3
/1.7 mM NaHCO
3
14 - 18 µS
5 mM Na
2
B
4
O
7
3 - 4 µS
10 mM Na
2
B
4
O
7
4 - 6 µS
22 mM Na
2
B
4
O
7
5 - 7 µS
6.2.1 Preparation of Eluents
A. Make sure that the eluents and the regenerant are made correctly.
B. Make sure that the eluents are made from chemicals with the recommended purity.
C. Make sure that the deionized water used to prepare the reagents has a specific resistance of 18.2 megohm-cm.
6.2.2 Borate Eluent Precautions
When using the borate eluent a few precautions should be kept in mind.
Baseline Stability
In order to have the expected baseline stability, the Anion MicroMembrane Suppressor III, AMMS III or the
ASRS-ULTRA, must be reliably removing all the cations (e.g., sodium) when using the standard carbonate eluent,
the AMMS III or the ASRS-ULTRA has only to remove 5.3 mM sodium. However, when using a 22 mM borate eluent,
the AMMS III or the ASRS-ULTRA has to remove 44 mM sodium. The AMMS III or the ASRS-ULTRA is fully
capable of removing this level of sodium, but only if it is functioning at optimum efficiency. If it is not, then a high