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- Posts: 3
- Joined: Mon Oct 07, 2019 9:01 pm
Thank you,
Discussions about GC-MS, LC-MS, LC-FTIR, and other "coupled" analytical techniques.
dzhang1 wrote:
I have cleaned source with aluminum oxide, ultersonic rinsed with DI, methanol, and hexane twice each. Replaced two new filaments. The vacuum is 5e-5 torr. Air and water check ok. The atune failed since it can't not obtain constant peak width. Recalibrate the #3widths, the atune is finally finished. But tuen evaluation saying position of isotope mass 503 is too low(479.61), ratio of 503 to 502 is high, and ratio of 219 to 69 is low (24.98). Also the 503 peak is wide and split at top. I also notice that EM Volts is high (2282) with a new cleaned source. Please advise.
Thank you,
dzhang1 wrote:
The insulator for repeller is a newly replaced. The wire connections are correct. B is in back and y is in front. The peak widths are 0.48-0.65 and/or 0.5-0.7. 503 peak is ugly and wide, and also splitting on top. Haven't done the ramp yet. Waiting on the EM arriving. Thank you,
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