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Influences of pH and In-source collisional energy on the cationization of insulin

✍ Scribed by Gérald Marie; Laurent Serani; Olivier Laprévote; Bhupesh C. Das

Publisher
John Wiley and Sons
Year
1998
Tongue
English
Weight
105 KB
Volume
12
Category
Article
ISSN
0951-4198

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✦ Synopsis

The influence of pH and in-source collisional energy variations on interactions between a model protein and sodium or cesium ions has been studied by electrospray ionization mass spectrometry. Behavioural differences regarding cationization have been observed and seem to be linked to the neutral or deprotonated form of carboxylic acids. At pH 8, cesium and sodium adducts totally disappear in the case of highest charge states. Increasing the cone voltage leads to an overall charge loss that can be attributed to the loss of cesium, sodium ions and even protons.

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