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Francese, G. et al.

Francese, Corana, Meneghetti, Marazza,

LC-MS characterization of trace impurities contained in calcium folinate.

An impurity present in calcium folinate (N5-formyl-5,6,7,8-tetrahydrofolic calcium salt) active pharmaceutical ingredient (API) was detected by high-performance liquid chromatography (HPLC). Through analysis by HPLC coupled with atmospheric-pressure chemical-ionization mass spectrometry (APCI-MS), a structure for this impurity was postulated and then proved by chemical synthesis.[1]

References

LC-MS characterization of trace impurities contained in calcium folinate. Francese, G., Corana, F., Meneghetti, O., Marazza, F. Journal of pharmaceutical and biomedical analysis. (2005) [Pubmed]

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