La impureza relacionada con L-alpha-Glycerophosphorylethanolamine (CAS 33049-08-0) presenta una naturaleza polar y funcionalidad fosfato que dificulta su separación frente a análogos lipídicos; su presencia se detecta y cuantifica preferentemente mediante LC-MS y HPLC en modos HILIC o con detectores evaporativos | complementados por 1H NMR para confirmar el esqueleto glicerol y la etanolamina. Esta impureza puede alterar parámetros de acidez | conductividad y estabilidad fisicoquímica del lote | por lo que los controles de calidad aplican límites típicos inferiores a 1% y protocolos de limpieza por SPE o cromatografía preparativa. Documentación analítica y trazabilidad son críticas para garantizar especificidad y pureza.
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