Difference between revisions of "CI 10305, Picric Acid, LC"

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(Molecular Information)
(Molecular Information)
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== Molecular Information ==
 
== Molecular Information ==
  
Molecular Formula C18H14N3NaO3S
+
Molecular Formula C6H3N3O7
  
Molecular Weight 375.3768
+
Molecular Weight 229.1 g/mol
  
 
[[File:Picric acid.png|center|frame]]
 
[[File:Picric acid.png|center|frame]]

Revision as of 14:15, 3 October 2017

Usage History

Picric acid

Synonyms

C.I. 10305; 2,4,6-trinitrophenol; 1,3,5-Trinitrophenol.

Molecular Information

Molecular Formula C6H3N3O7

Molecular Weight 229.1 g/mol

Picric acid.png

Analytical instrumentation and procedures

Dyes were extracted from textiles (silk or wool) using formic acid/methanol (5:95, v/v).

HPLC column: Vydac 214TP52 analytical column (2.1 mm diameterX250 mm; 5-ím particle size).

HPLC-DAD-MS instrument: HPLC-DAD-MS analysis was performed with an Agilent 1100 liquid chromatography system consisting of an automatic injector, a gradient pump, a HP series 1100 DAD, and an Agilent series 1100 VL on-line atmospheric pressure ionization electrospray ionization mass spectrometer.

HPLC gradient profile: Separations were done on a The column was eluted at a flow rate of 0.2 mL/min with a tertiary gradient of water (A),acetonitrile (B), and 1% (v/v) aqueous formic acid (C) with the following elution program: 0 min, 90% A, 5% B, 5% C; 0-55 min, a linear gradient to 35% A, 60% B, 5% C; 55-60 min, a linear gradient elution to 15% A, 80% B, 5% C; 60-62 min, isocratic elution at 15% A, 80% B, 5% C; 62-70 min gradient elution to 90% A, 5% B, 5% C; and reequilibration with the latter solvent for 15 min. The mass spectrometer was run both in the negative ion mode because metanil Yellow is negatively charged without Na+.

Chromatograms

Absorbance at 450nm (mAU)[1]


Results

compounds identified

References

[1] Zhang, X. Laursen R. and Osipova S. (2005) "Analysis of dyes in some 19th-century Uzbek suzanis"; Dyes in History and Archaeology To be published.