Hi,

for 265 [M-H]- see here; http://www.maconda.bham.ac.uk/contaminant.php?id=CON00113

For the 269 [M-H]- see here; http://www.maconda.bham.ac.uk/contaminant.php?id=CON00182

For general browsing of the database see here; http://www.maconda.bham.ac.uk/browse.php

Hope that helps,

Peter

Hi,

for 265 [M-H]- see here; http://www.maconda.bham.ac.uk/contaminant.php?id=CON00113

For the 269 [M-H]- see here; http://www.maconda.bham.ac.uk/contaminant.php?id=CON00182

For general browsing of the database see here; http://www.maconda.bham.ac.uk/browse.php

Hope that helps,

Peter

Hi Peter

Thanks so much for the insights. We are probably receiving some samples that are contaminated with detergents, so that might be the case. We have observed a little emulsion formation on some samples, but we thought that maybe some lipids could have provoked that.

Indeed, just when I arrived at the lab today I went to check it and it really IS triton x-100!

Many thanks! :)

Glad it all worked out for you. It's really annoying getting contamination, but nice when you can track down the source...

The Possible Adducts are M +1, M-1, M+ Sodium , M-sodium, M + Acetate , M-Acetate which may be with 265 m/z. Adduct formation depends on inoization of compound in ESI APPI or APCI mode. It can be know during ionization.

Dr. M.R Tiwari (SICART)