摘要：Dating inks of suspicion is one of the important areas in document analysis. Dating involves the detection of changes in the structure of the ink on documents over time using chromatographic and spectroscopic methods. For detection, validated analytical methods must be used. The laboratory must apply these developed methods to samples with known age and preserving conditions (temperature, humidity, light) and create a time curve. In this study; Thermal Desorption- Gas Chromatog- raphy/Mass Spectrometry and High Performance Liquid Chromatography with Ultraviolet Detection (HPLC-UV) systems were used simultaneously. Phenoxyethanol, which was used as a solvent and dyes (crystal violet, methyl violet, tetramethyl para- rosaniline and victorian blue) within the structure of the ink were detected in 20 different brands and models of blue pens. Methods were developed in thermal desorber-gas chromatography/mass spectroscopy for the detection of phenoxyethanol, and for the detection of dyes, methods were developed in high pressure liquid chromatography.Using the developed method, ink samples from 900 documents composed between 1999-2005 with different pens were analyzed. Aging curve was drawn by calculating the dye ratio (peak area of crystal vio- let/peak area of methyl violet). The combined methods that determine both solvents and dyes are the ones that present the most reproducible results over longer periods after the ink has been deposited.
