Waters/Micromass Q-TOF API typical pressure?

Discussions about GC-MS, LC-MS, LC-FTIR, and other "coupled" analytical techniques.

2 posts Page 1 of 1
Hello!

What would be typical/normal "backing pirani" pressure for this instrument?
It's showing around 1 mBar and I suspect there is a leak in the forevacuum line. All turbos spin at 100%

Thanks!
Alexei Gapeev
Millis Scientific, Inc.
gapeev@millisscientific.com
Tel. 877-844-2635
I don't know what the pressure is on this instrument, however I am sure it should be well below 1 mbar (maybe 10-5 - 10-7 mbar). This anormaly high value might be due to two distinct things:

1) the vacuum inside the MS is good but the gauge sucks.

2) the vacuum is really at 1 mbar for some reason.

If your pumps are working 100%, I would strongly suspect the gauge. To know if this is the case or not, just run a known sample. If you have similar results as before, the problem is the gauge, and if you don't detect any ion, the vacuum is really 1 mbar. We are currently running a triple quad from Waters which displays a supposed pressure of 1.4 mbar but otherwise works perfectly.
2 posts Page 1 of 1

Who is online

In total there is 1 user online :: 0 registered, 0 hidden and 1 guest (based on users active over the past 5 minutes)
Most users ever online was 1117 on Mon Jan 31, 2022 2:50 pm

Users browsing this forum: No registered users and 1 guest

Latest Blog Posts from Separation Science

Separation Science offers free learning from the experts covering methods, applications, webinars, eSeminars, videos, tutorials for users of liquid chromatography, gas chromatography, mass spectrometry, sample preparation and related analytical techniques.

Subscribe to our eNewsletter with daily, weekly or monthly updates: Food & Beverage, Environmental, (Bio)Pharmaceutical, Bioclinical, Liquid Chromatography, Gas Chromatography and Mass Spectrometry.

Liquid Chromatography

Gas Chromatography

Mass Spectrometry