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3.7 Preparation
NOTE
: Refer to the instruction manuals for usage of Ultrasonic
Cleaner etc.
3.7.1 Degassing and Removing Dust from Mobile Phase
(1) Degas mobile phase before use without fail.
Oxygen gas and nitrogen gas contained in mobile phase
cause the following when used under high pressure.
(a) Change in quality of mobile phase sample
(b) Loss of column efficiency caused by bubbles
(c) Noise of detector caused by bubbles
(d) Variation of pump pressure
(e) Reduced precision of gradient mixing ratio
(2) For degassing mobile phase, two methods are available,
Degassing unit and Manual. Degassing method is
explained in 3.7.2.
(3) Use mobile phase without dust.
Dust in mobile phase causes trouble in pumping and the
pressure may vary.
3.7.2 Degassing Mobile Phase
There are various ways of degassing.
Perform degassing suitable for the purpose of use.
(1) Degassing by Ultrasonic Waves (when mobile phase is
organic solvent)
Example : Methanol
100%
Mixture of methanol 80% and acetonitrile
20%
Preparation : Ultrasonic cleaner (put water in the bath
without fail)
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 ...
Страница 244: ......
Страница 406: ......
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 ...
Страница 1016: ......
Страница 1022: ...Sample rack A component part on which a sample is set Logbook A historical record of instrument operation APPENDIX 3 2 ...