AL a
b C5 H5 O6
Figure 3 – a) Elution of anions from a cycled sample exhibiting 40% capacity loss. b) HRAMS spectrum for peak at 27.73 min. Conditions in Table 1.
Table 2 – Peak identifications consistent with both anion exchange and mass spectrometry data Retention time (minutes) Exact mass (m/z) ID 3.42
4.20
6.21 7.0
8.15
14.2–14.5 14.43 15.55 15.62 16.19 17.22 23.03 27.73 41.79 49.19
125.0009 75.0088
112.9810 126.9966 123.0121 Several
110.9853 117.0193 133.0137 103.0036 96.9601 98.9696 161.0092 176.9360 175.0249
Dimethyl phosphate
Methyl carbonate (from dimethyl carbonate)
Monofluorophosphate methyl ester Ethylphosphorfluoridate Propylsulfonate Phosphate esters
Methyl hydrogen phosphate Succinate Malate
Malonate HSO4 H2 C5
PO4 H5 H3 C6 P2 O6 O7 H7 O6
References 1. Zubarev, R.A. and Makarov, A. Orbitrap
mass spectrometry. Anal. Chem. 2013, 85, 5288–96.
2. Weiss, J. Ion Chromatography, 2nd ed., VCH: Weinheim, Germany, 1995, pp. 360–7.
3. Vortmann, B.; Nowak, S. et al. Rapid char- acterization of lithium ion battery electro- lytes and thermal aging products by low- temperature plasma ambient ionization high-resolution mass spectrometry. Anal. Chem. 2013, 85(6), 3433–8.
Rosanne W. Slingsby is a senior principal research scientist in the R&D department for Dionex products at Thermo Fisher Scientific, 1228 Titan Way, Sunnyvale, Calif. 94086, U.S.A.; tel.: 408-481-4542; e-mail:
rosanne.slingsby@
thermofisher.com;
www.thermofisher.com. Paul J. Voelker is vertical marketing manager for environmental and industrial markets at Thermo Fisher Scientific. Christopher Pohl is vice president for consumables R&D at Thermo Fisher Scientific. Charanjit Saini is research sci- entist for Dionex products at Thermo Fisher Scientific. Kate Comstock is senior marketing specialist at Thermo Fisher Scientific. John Moote is a senior chemist at General Motors, Warren, Mich. Michael Balogh is a technical fellow, and Ramona Ying is a staff researcher at General Motors R&D Center, Warren, Mich.
AMERICAN LABORATORY 37 MAY 2016
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