Polymer Factory’s new IM-MS-designated tuning and calibration kit is based on hydrophilic dendritic macromolecules that cover the m/z range between 295 and 1,915 and the CCS range of 160 - 440 Å2.
 
This mixture of 10 hydrophilic, dendritic components is delivered as a dried down, neat solid. Recommended ESI concentration is 10 µg/mL in polar solvents, such as ethanol, methanol, THF (or their aqueous mixtures), water, aqueous acetonitrile.
 
The 10 components will generate both singly and doubly charged ions, yielding m/z and CCS values as follows:
 
Component ID
Chemical Formula
z
m/z [M+zNa]z+
DTCCSN2 [Å2]
PFS-1022
C12H22O8
z = 1
317.1212
160.65
PFS-2012
C17H30O10
z = 1
417.1737
185.39
PFS-1032
C20H36O12
z = 1
491.2104
198.51
PFS-1042
C25H44O16
z = 1
623.2527
220.65
PFS-1052
C30H52O20
z = 1
755.295
246.4
PFS-3012
C37H62O22
z = 1
881.363
287.23
PFS-1062
C40H70O25
z = 1
973.4104
270.24
PFS-2032
C50H84O30
z = 1
1187.4945
317.41
PFS-2032
C50H84O30
z = 2
605.2421
351.19
PFS-2042
C65H108O40
z = 1
1551.6315
366.74
PFS-2042
C65H108O40
z = 2
787.3106
388.89
PFS-2052
C80H132O50
z = 1
1915.7684
411.72
PFS-2052
C80H132O50
z = 2
969.3791
438.51
 
Observe that intensities, charge states, H+/Na+ and their distribution can vary depending on the hardware, spraying conditions and tuning.
 
What makes SpheriCal® IM-MS unique and superior to other tuning and calibration mixes?
In contrast to other calibration solutions, we offer our calibrants as solid, neat compound. The material is fully soluble in hydrophilic solvents commonly used in ESI. This includes water, alcohols, aqueous mixtures of alcohols, aqueous ACN.
Our compounds are “non-sticky” in the ion source and will not tail into your data. At the same time, the compatibility with a wide range of spraying solutions and conditions enables internal calibration.
Further, SpheriCal® does not contain any fluorinated components.
With a shelf life of years, we expect the 10 µg portions to enable about 100 calibrations.
SpheriCal® offers reliable and accurate calibration. Thanks to the extended calibration space in the CCS vs m/z plane, there is no need to extrapolate from singly charged molecules with limited molecular masses.
 
In positive mode, our compounds do not need addition of acetic or formic acid and ionize well with traces of Na to yield [M+Na]+. Addition of acid will also yield [M+H]+ in positive mode.
In negative mode, addition of acid is required and yields [M+acid-H]- anions. [M-H]- might also be observed.
This gives full control to the end user to choose concentration, solvent, addition of acid etc.
 
 
The feasabilty on several IM-MS platforms has been studied and published in the Journal of the American Society for Mass Spectrometry
 
 
Related Publications
E.R. Sekera, J. Sommertune et. al.: Utilization of bis-MPA Dendrimers for the Calibration of Ion Mobility Collision Cross Section Calculations, J. Am. Soc. Mass Spectrom. 2024, XXXX, XXX, XXX-XXX
https://pubs.acs.org/doi/10.1021/jasms.3c00428