Application of dye analysis in forensic fibre and textile examination: Case examples

Schotman, Tom G.; Xu, X.; Rodewijk, Nicole; Weerd, Jaap van der

doi:10.1016/j.forsciint.2017.07.026

Cited by 27 publications

(40 citation statements)

References 10 publications

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“…Table S1, included in the Appendix, shows methods for the extraction of disperse dyes described in the literature [12,13,14,15,16,17,18,19,20,21]. All the studies concerned polyester fibers.…”

Section: Literature Review Sectionsmentioning

confidence: 99%

“…Method No. 9—Single fibers of 10 mm in length were extracted using 20 μL of dimethylsulfooxide (DMSO) at 100 °C to discoloration or for a maximum of 2 h [20].…”

Section: Literature Review Sectionsmentioning

confidence: 99%

“…Because dyes can provide significant information in forensic analyses, many studies have already been carried out to analyze dyes in colored fibers by using diverse microscopical and spectral methods, e.g.,: microspectrophotometry [1,2,3,4], Raman spectroscopy [1,5,6,7,8], excitation-emission luminescence [9], infrared matrix-assisted laser desorption electrospray [10]; as well as chromatography methods, e.g.,: thin liquid chromatography (TLC) [8,11,12], liquid chromatography (HPLC) with different detectors [12,13,14,15,16,17,18,19,20,21], and capillary electrophoresis with a DAD or MS detector [22,23,24,25,26,27,28].…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

The Identification of Polyester Fibers Dyed with Disperse Dyes for Forensic Purposes

et al. 2019

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In forensic laboratories, the most commonly analyzed microtraces are microscopic fragments of single fibers. One of the main goals of the examination of fragments of fibers a few millimeters long is to determine their characteristic physicochemical properties and compare them with fibers originating from a known source (e.g., a suspect’s clothes). The color and dyes of fiber microtraces play an important role in their research and evaluation, being analyzed by means of microscopic, spectroscopic, and chromatographic methods. The results of examinations conducted with the use of spectroscopic techniques might be ambiguous due to overlapping bands of absorption and the transmission and dispersion of electromagnetic radiation corresponding to the specific chemical structure of the fibers and their dyes. For this reason, it is very important to improve currently available spectroscopic methods and/or to propose new ones that allow evidential materials to be analyzed in a much more reliable way. In this review, the possibility of the use of chromatographic techniques with different detection systems for such analyses is underlined. This review covers the different analytical methods used in the forensic analysis of polyester fibers dyed with disperse dyes. Polyester fibers occupy the first position among synthetic fibers in their use for a variety of purposes, and disperse dyes are commonly applied for dyeing them.

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Section: Literature Review Sectionsmentioning

confidence: 99%

“…Method No. 9—Single fibers of 10 mm in length were extracted using 20 μL of dimethylsulfooxide (DMSO) at 100 °C to discoloration or for a maximum of 2 h [20].…”

Section: Literature Review Sectionsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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The Identification of Polyester Fibers Dyed with Disperse Dyes for Forensic Purposes

et al. 2019

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“…Various analytical techniques have been used to characterise and/or identify functional groups and particularly the azo group [14] in dye molecules. In general, analytical approaches include an extraction stage using low polarity solvents, such as chlorobenzene, methanol, dimethylsulfooxide, acetonitrile and dimethylformamide [15,16]. HPLC has been widely deployed for molecular separation, particularly with UV-Vis or fluorescence detection systems [4,17], due to the abundant chromophores usually present in the azo pigments, although hyphenated mass spectrometry detectors have also been used [15,[18][19][20].…”

Section: Introductionmentioning

confidence: 99%

Raman spectrometry as a screening tool for solvent-extracted azo dyes from polyester-based textile fibres

et al. 2020

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Some types of textile fibres are considered to be the cause of allergic reactions and other adverse health effects on humans. The main compounds behind these health problems usually contain azo groups in their chemical structure, which are widely employed as azo dyes in the manufacture of textile and clothing products. In this respect, availability of simple analytical procedures for identifying azo groups in textiles is of concern, not only for toxicological studies, but also for clinical and forensic investigations. In this work, conventional Raman spectrometry was assessed as an analytical tool for identification of the azo function in the extracts of fibres obtained after applying a liquid-solvent extraction procedure to the polyester-based textile products. A mediumpolarity solvent of ethanol-diethyl ether (1:1 mixture) was shown to be the most effective extraction medium. Two laser lines at 514.5 nm and 785 nm were compared, with the longer wavelength preferred as additional peaks were identified in the Raman spectrum, which had better signal-to-background and signal-to-noise ratios owing to decreased fluorescence in contrast to excitation at 514.5 nm. The method reported is a convenient procedure that can be applied in many instances when rapid screening of fibre dyes is required.

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“…Other techniques used routinely in most laboratories are UV/VIS micro spectrometry (MSP) and Fourier-transform infrared spectrometry (FT-IR). Many laboratories use additional techniques, such as Raman spectrometry, thin layer chromatography, chemical, and melting tests [17]. The present paper was focused on the development of a new HPLC-DAD method for the detection of Congo Red dye from water samples.…”

Section: Introductionmentioning

confidence: 99%

HPLC detection of synthetic dyes in residual waters from wastewater treatment using adsorption on magnetic materials

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Simionescu

Scutariu

et al. 2020

RJEEC

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Surface water contamination by synthetic dyes generates human and wildlife adverse health effects and causes photosynthesis decrease due to intense sun-light absorption of these pollutants. 50% of total discharged industrial effluents contain azo dyes. Congo Red is a benzidine based anionic azo dye that is usually employed in rubber, paper and plastic industries. Congo Red can cause eye and skin irritation and is potentially carcinogenic in nature. This study explores the development of a new HPLC method to detect synthetic dyes in residual waters coming from wastewater treatment technologies based on magnetic material adsorption. Cobalt ferrite (CoFe2O4) and chitosan-coated cobalt ferrite (CoFe2O4-Chit) prepared by a simple co-precipitation method were tested as adsorbents for Congo Red (CR). Effect of contact time, solution pH, and initial dye concentration were studied with respect to Congo Red adsorption efficiency. The adsorption experiments were performed at pH = 4.5 and 10.8. The highest value for the removal efficiency using the magnetic material of cobalt ferrite coated with chitosan (CoFe2O4-Chit) was obtained at pH 10.8.

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Application of dye analysis in forensic fibre and textile examination: Case examples

Cited by 27 publications

References 10 publications

The Identification of Polyester Fibers Dyed with Disperse Dyes for Forensic Purposes

The Identification of Polyester Fibers Dyed with Disperse Dyes for Forensic Purposes

Raman spectrometry as a screening tool for solvent-extracted azo dyes from polyester-based textile fibres

HPLC detection of synthetic dyes in residual waters from wastewater treatment using adsorption on magnetic materials

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