Quantitative determination of dimethylaminoethanol in cosmetic formulations by nuclear magnetic resonance spectroscopy.
J AOAC Int
; 91(6): 1303-8, 2008.
Article
en En
| MEDLINE
| ID: mdl-19202790
A nuclear magnetic resonance (NMR) spectroscopic method was validated for the quantitative determination of dimethylaminoethanol (DMAE) in cosmetic formulations. The linearity in the range from 0.5000 to 1.5000 g (DMAE salt/mass maleic acid) presents a correlation coefficient > 0.99 for all DMAE salts. The repeatability (intraday), expressed as relative standard deviation, ranged from 1.08 to 1.44% for samples and 1.31 to 1.88% for raw materials. The detection limit and quantitation limit were 0.0017 and 0.0051 g for DMAE, 0.0018 and 0.0054 g for DMAE bitartrate, and 0.0023 and 0.0071 g for DMAE acetamidobenzoate, respectively. The proposed method is simple, precise, and accurate and can be used in the quality control of raw materials and cosmetic gels containing these compounds as active substances.
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Colección:
01-internacional
Base de datos:
MEDLINE
Asunto principal:
Cosméticos
/
Deanol
Idioma:
En
Revista:
J AOAC Int
Año:
2008
Tipo del documento:
Article
País de afiliación:
Brasil
Pais de publicación:
Reino Unido