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

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== Results ==
== Results ==
[[File:Metanil Yellow result.PNG|center|frame|compounds identified]]
[[File:Picric acid result.PNG|center|frame|compounds identified]]
== References ==
== References ==

Revision as of 14:32, 3 October 2017

Usage History

Picric acid


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+.


Absorbance at 347nm (mAU)[1]


compounds identified


[1] Cátia Susana da Costa Nogueira Souto, "Analysis of Early Synthetic Dyes with HPLC-DAD-MS An important database for analysis of colorants used in cultural heritage", Thesis, Master Degree in Conservation and Restoration of Textiles. UNIVERSIDADE NOVA DE LISBOA, 2010.