Identification of anthraquinone coloring matters in natural red dyes by electrospray mass spectrometry coupled to capillary electrophoresis.
J Mass Spectrom
; 38(12): 1252-8, 2003 Dec.
Article
em En
| MEDLINE
| ID: mdl-14696204
ABSTRACT
Capillary electrophoresis with UV/visible diode-array detection (DAD) and electrospray mass spectrometric (ESI-MS) detection were used for the identification of anthraquinone color components of cochineal, lac-dye and madder, natural red dyestuffs often used by ancient painters. For the purpose of such analysis, ESI-MS was found to be a much more appropriate detection technique than DAD one owing to its higher sensitivity (detection limits in the range 0.1-0.5 micro g ml(-1)) and selectivity. The method developed made it possible to identify unequivocally carminic acid and laccaic acids A, B and E as coloring matters in the examined preparations of cochineal and lac-dye, respectively. In madder, European Rubia tinctorum, alizarin and purpurin were found. The method allows the rapid, direct and straightforward identification and quantification of components of natural products used in art and could be very helpful in restoration and conservation procedures.
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Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Antraquinonas
/
Carmim
/
Eletroforese Capilar
/
Espectrometria de Massas por Ionização por Electrospray
/
Corantes
Tipo de estudo:
Diagnostic_studies
Limite:
Animals
Idioma:
En
Revista:
J Mass Spectrom
Ano de publicação:
2003
Tipo de documento:
Article
País de afiliação:
Polônia