Photoacoustic spectroscopy — A new method for dye identification in the substrate-dye system

Golob, Vera; Jeler, Slava; Gomilšek, Jana Padežnik

doi:10.1016/0143-7208(95)00098-4

Cited by 4 publications

(4 citation statements)

References 3 publications

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“…The mass of R1 was suggested to be approximately 496, which corresponded to that of a commercial anthraquinone disperse dye, Disperse Red 92 (DR 92; C25H24N2O7S, molecular weight 496.53; Figure 3B). The UV-visible spectrum of R1 (λmax: 254, 519, and 553 nm in methanol; Figure 3A) was also similar to that of DR 92 (24). Thus, DR 92 was obtained commercially and analyzed by HPLC and LC-MS/MS.…”

Section: Identification Of Xenobiotic Ahr Ligandsmentioning

confidence: 71%

Isolation and Identification of Xenobiotic Aryl Hydrocarbon Receptor Ligands in Dyeing Wastewater

Chou

Matsui

Misaki

et al. 2006

Environ. Sci. Technol.

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Dyeing wastewater collected in Kyoto city, Japan, was investigated for the occurrence of aryl hydrocarbon receptor (AhR) ligands by using an AhR-responsive reporter gene assay. Concentrated extracts of wastewater samples elicited a dose-dependent increase in AhR ligand activity, and several hydrophobic HPLC fractions of the extracts were highly effective in inducing AhR ligand activity. Three potential AhR ligands were isolated from these fractions and identified to be Disperse Red 92, Disperse Yellow 64, and 3'-hydroxybenzo[b]quinophthalone by using HPLC and LC-MS/MS. Disperse Red 92, which has also been detected in the treated effluent from a sewage plant receiving the wastewater, is an anthraquinone disperse dye showing weak AhR binding affinity in the assay. Disperse Yellow 64 and 3'-hydroxybenzo[b]quinophthalone are quinoline disperse dyes capable of activating the AhR at nanomolar concentrations. In particular, Disperse Yellow 64 is a highly potent AhR ligand that was 3 times more effective in inducing AhR ligand activity than beta-naphthoflavone in the assay. Quinoline disperse dyes are suggested to be a new class of xenobiotic AhR ligands which pose a danger to aquatic biota and human health.

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Section: Identification Of Xenobiotic Ahr Ligandsmentioning

confidence: 71%

Isolation and Identification of Xenobiotic Aryl Hydrocarbon Receptor Ligands in Dyeing Wastewater

Chou

Matsui

Misaki

et al. 2006

Environ. Sci. Technol.

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“…The resulting data can be used to create an image based on the optical absorption of the sample, and can be used to identify biological structures with differing optical absorption any available laser wavelength [29,30]. This technique has been applied in vivo to identify various dermatological pathologies [31], and has been used to identify dyes used in fabrics [32].…”

Section: Introductionmentioning

confidence: 99%

“…The combination of an increased variety of laser wavelengths and photoacoustic testing could be especially valuable for tattoo removal. An OPO laser system would be able to test the spectra of various pigments in a similar fashion as has been used to identify fabric dyes [32]. The spectra of the tattoo could then be compared to the spectra of the patient to find the optimal treatment wavelength.…”

Section: Introductionmentioning

confidence: 99%

Enhanced laser surface ablation with an integrated photoacoustic imaging and high intensity focused ultrasound system

Hazlewood

Yang

2019

Lasers Surg Med

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Background and Objective Combined laser and ultrasound treatments have been found to have synergistic effects, which may be of particular note in dermatology. We aim to investigate the potential of this technology for dermatology through in vitro and ex vivo experiments. Methods In vitro tissue phantoms made of agar and tattoo ink and tattooed ex vivo chicken breast tissue were used. An integrated photoacoustic imaging and high intensity focused ultrasound (HIFU) system, using a 5‐ns tunable OPO laser system and a 5 MHz HIFU transducer, was used to perform photoacoustic analysis to identify the optical contrast, and perform combined laser and ultrasound ablation. On the tissue phantoms, lines of ablation were created under various operating conditions. The samples were then quantified to determine the level of ablation. Same procedures were performed on the tattooed chicken breast tissue and the tattoo was removed by using combined laser and ultrasound. Results Ablation in the in vitro tissue phantoms was observed with properly synchronized laser and ultrasound while no ablation was found with either laser or ultrasound alone. Increases to the intensity or pulse duration of ultrasound caused an increase in ablation to the samples. The tattoo was removed from the ex vivo chicken breast using combined laser and ultrasound with a radiant exposure of 1.2 J/cm2 while laser and ultrasound alone were unable to remove the tattoo. Conclusions We determined that by supplementing nanosecond laser pulses with ultrasound, ablation, and tattoo removal can be achieved at laser radiant exposures levels would otherwise be ineffective. The area of ablation can be adjusted through changes in the intensity and duration of the ultrasound burst with a constant laser intensity. Additionally, the system can be used to perform photoacoustic analysis of the tissue to estimate the relative optical absorbance at various available wavelengths, allowing for pretreatment analysis. Lasers Surg. Med. 9999:1–9, 2019. © 2019 Wiley Periodicals, Inc.

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“…Many PA depth pro® le studies on widely different systems have been published: Vidberg et al 20 determined photoacoustically the therm al-conductivity pro® le in steel to estimate a hardening pro® le in the m aterial. Golob et al 21 presented a photoacoustical method to identify a dye in textiles. Bajic et al 22 used PAS to analyze underground storage tank waste sludge, which is dif® cult to analyze with com mon IR techniques because of its extreme heterogeneity.…”

Section: Introductionmentioning

confidence: 99%

Depth Profiles in Coated Paper: Experimental and Simulated FT-IR Photoacoustic Difference Magnitude Spectra

2000

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Experimental photoacoustic (PA) magnitude spectra of a coated paper and the uncoated basepaper are presented. The normalized and scaled PA magnitude spectra are used to calculate difference magnitude spectra. It was decided to scale all PA magnitude spectra to (low) equal intensity at the approximately optically thin spectral range before subtraction. Then no infrared (IR) bands of identical band shape and height (as needed for common difference spectroscopy) in either PA magnitude spectrum are needed. Contributions of the two individual layers to the IR-PA magnitude spectrum of the coated paper are separated in the difference spectrum by their sign. An increasing relative contribution of the coating layer with an increasing phase modulation frequency is found. On decreasing the thermal length to a value near the coating thickness, the difference spectra increasingly show positive coating bands and negative bulk signals. The extension of the Rosencwaig–Gersho theory to a double-layered system introduced by N. C. Fernelius [J. Opt. Soc. Am. 70, 480 (1980) and J. Appl. Phys. 50, 650 (1980)] applied to synthetic spectra confirms the experimental observation. It is found that photoacoustic difference spectroscopy may provide quantitative depth-resolved spectral information due to the presented scaling procedure, and photoacoustic difference magnitude spectra of any polymeric laminate may therefore be calculated.

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Photoacoustic spectroscopy — A new method for dye identification in the substrate-dye system

Cited by 4 publications

References 3 publications

Isolation and Identification of Xenobiotic Aryl Hydrocarbon Receptor Ligands in Dyeing Wastewater

Isolation and Identification of Xenobiotic Aryl Hydrocarbon Receptor Ligands in Dyeing Wastewater

Enhanced laser surface ablation with an integrated photoacoustic imaging and high intensity focused ultrasound system

Depth Profiles in Coated Paper: Experimental and Simulated FT-IR Photoacoustic Difference Magnitude Spectra

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