Colored Tattoo Ink Screening Method with Optical Tissue Phantoms and Raman Spectroscopy

Area of Science:

• Analytical Chemistry
• Biomedical Optics
• Materials Science

Background:

• Tattoo popularity necessitates robust methods for analyzing tattoo ink composition.
• Ensuring tattoo ink safety and quality is crucial for public health.
• Current analytical methods may not be suitable for in vivo or ex vivo tattoo analysis.

Purpose of the Study:

• To evaluate Raman spectroscopy for analyzing tattoo ink composition in biological materials.
• To develop and utilize optical tissue phantoms for mimicking in vivo conditions.
• To assess the feasibility of Raman spectroscopy for tattoo ink safety and medical diagnostics.

Main Methods:

• Development of optical tissue phantoms simulating human dermis optical properties.
• Mimicking tattoo application procedures within the developed phantoms.
• Raman spectroscopy surface line scanning to determine ink concentration gradients.
• Analysis and comparison of spectra from raw inks and inks within phantoms.

Main Results:

• Raman spectroscopy successfully analyzed tattoo ink composition in simulated biological matrices.
• The study established the influence of matrix scattering and chemical composition on spectral data.
• Spatial gradient analysis revealed the capability to detect low ink concentrations for margin assessment.
• Comparable spectral data were obtained for inks before and after phantom application.

Conclusions:

• Raman spectroscopy is a viable screening method for tattoo ink analysis.
• The technique can support enforcement of tattoo ink safety legislation.
• Raman spectroscopy shows potential as an early medical diagnostic tool for tattoo-related conditions.