3.7.2
3.7.2 Degassing of Mobile Phase
There are various degassing methods. Use a method suitable
for your analytical purpose.
(1) Example of Degassing by Ultrasonic Wave (when mobile
phase is an organic solvent)
Example
: Methanol 100%, mixed solution of
methanol 80% + acetonitrile 20%
Necessary device : Ultrasonic washer
(Be sure to fill the bath with water.)
Mobile phase
container
Be sure to
remove the cap.
Ultrasonic washer
(a) In an ultrasonic washer, place a mobile phase
container after adequate stirring (see “*” below).
* For using a mixed mobile phase, complete mixing
by means of a stirrer is required. Otherwise, poor
reproducibility or baseline drift will be caused.
NOTE
: The mobile phase of an organic solvent must
always be degassed with an ultrasonic washer
containing water.
(b) Turn ON the power switch of the ultrasonic washer.
(c) As degassing progresses, small bubbles are
discharged and they gradually become larger.
Continue degassing until bubbles are no longer
discharged. This process takes about 5 to 10 minutes.
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Содержание CHROMASTER 5160
Страница 54: ...3 17 Fig 3 3b Connecting with the Chromaster 5260 Autosampler Injection valve Syringe valve Port4 ...
Страница 165: ...INDEX 3 U UI Pad 2 6 UTLTY 2 7 3 18 W Wiring covers 2 4 APPENDIX 1 19 Z Zero pressure calibration 3 18 ...
Страница 190: ...APPENDIX 3 2 Log book Means the information containing records of instrument operating conditions ...
Страница 221: ...3 1 Replacement Procedure b Replace the fuse with a new one and then attach the fuse holder by pressing it 3 2 ...
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Страница 433: ...SAFETY 10 SAFETY SUMMARY WARNING and CAUTION Labels on Instrument 7 Before Turning on Xenon Lamp Front View ...
Страница 999: ...Retaining screws Fixing bracket Appended Fig 1 5 Removal of Fixing Brackets APPENDIX 1 13 ...
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Страница 1022: ...Sample rack A component part on which a sample is set Logbook A historical record of instrument operation APPENDIX 3 2 ...