Enzymatic extraction of dyes for differentiation of red cotton fibres by TLC coupled with VSC

Góra, Paulina; Wąs-Gubała, Jolanta

doi:10.1016/j.scijus.2019.02.007

Cited by 7 publications

(13 citation statements)

References 10 publications

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“…Table 2 shows the extraction procedure for the isolation of reactive dyes from dyed cotton, which has been described in the literature [3,14,29,[32][33][34][35][36][37][38][39].…”

Section: Extraction Of Reactive Dyes From Dyed Cotton Fibersmentioning

confidence: 99%

“…Thus, the extraction conducted was also carried out for eight threads taken from each textile product, and a double volume of each reagent was used. The extract was evaporated to dryness, and the dry residue was dissolved in 150 µL of acetate buffer (pH 5) [3].…”

Section: Extraction Of Reactive Dyes From Dyed Cotton Fibersmentioning

confidence: 99%

“…In the forensic laboratory, color is established firstly with the use of optical microscopy techniques, and then, on this basis, the evidential fibers are qualified for further research using more advanced analytical methods. So far, it has mainly concerned UV-Vis microspectrophotometry [1], Raman spectroscopy [2], and more traditional and low-cost chromatographic methods, such as thin-layer chromatography (TLC) [3]. Single cotton fibers comprise the most common group of microtraces, and these fibers have been part of the human environment since ancient times.…”

Section: Introductionmentioning

confidence: 99%

“…Table 1 shows the characteristic groups of reactive dyes. 3. MCT/MCT bi-functional dyes-these are reactive dyes containing two monochlorotriazinyl groups and characterized by high fixation in dyeing polyester/cotton blends.…”

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confidence: 99%

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The Identification of Cotton Fibers Dyed with Reactive Dyes for Forensic Purposes

et al. 2020

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Some of the most common microtraces that are currently collected at crime scenes are fragments of single fibers. The perpetrator leaves them at a crime scene or takes them away, for example, on their clothing or body. In turn, the microscopic dimensions of such traces mean that the perpetrator does not notice them and therefore usually does not take action to remove them. Cotton and polyester fibers dyed by reactive and dispersion dyes, respectively, are very popular within clothing products, and they are hidden among microtraces at the scene of a crime. In our recently published review paper, we summarized the possibilities for the identification of disperse dyes of polyester fibers for forensic purposes. In this review, we are concerned with cotton fibers dyed with reactive dyes. Cotton fibers are natural ones that cannot easily be distinguished on the basis of morphological features. Consequently, their color and consequently the dye composition are often their only characteristics. The presented methods for the identification of reactive dyes could be very interesting not only for forensic laboratories, but also for scientists working in food, cosmetics or pharmaceutical/medical sciences.

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“…Table 2 shows the extraction procedure for the isolation of reactive dyes from dyed cotton, which has been described in the literature [3,14,29,[32][33][34][35][36][37][38][39].…”

Section: Extraction Of Reactive Dyes From Dyed Cotton Fibersmentioning

confidence: 99%

Section: Extraction Of Reactive Dyes From Dyed Cotton Fibersmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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confidence: 99%

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The Identification of Cotton Fibers Dyed with Reactive Dyes for Forensic Purposes

et al. 2020

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“…Peru establishes a textile growth of 10 to 15% (Ana Marija Grancaric, 2013) and various companies in the area are involved in the export of garments based on polyester fibers and their mixtures with cotton; and within their processes they have the Dyeing, which establishes a substantial difference due to the pre-treatment of the main process, such as the solidity of the washing for discoloration and the presence of -NO2 in the chromoforms, responsible for increasing the affinity of the dye to cotton and the characteristics of solidity and resistance to rubbing of the fabric (Dan Gao, 2014). The implementation of this dyeing process in polyester fibers and their cotton blends is taken as a reference of quality standards (Sarkar A. K., 2015) taking into account aspects such as hue, color, standardized required tone and its depletion process, in a reduced time and somehow establish economic competitiveness (Arriaga A.M., 2013); the dyes present in the fibers present effective techniques in terms of enzymatic digestion methodologies to extract reactive dyes from the cotton fibers depending on the hydrolytic activity (Paulina Góra, 2019). Dyeing is established at 100% in cotton but not in its cotton and polyester blends where a depletion process is generated due to the volumes in each operation, this is due to the conditions of migration of the dye to the surface of the fiber, where the depletion rate of the dye is established according to the relative concentration, instead in the dyeing of the cotton fiber, its depletion establishes a better dyeing and improves the strength properties, its quality and the solids of the cationic dyeing compared to traditional dye dyeing (M. Ben Ticha, 2013).…”

Section: Introductionmentioning

confidence: 99%

Diffusion characteristics of dyeing in Polyester fiber garments referred to their mixtures with cotton and composition

Jimenéz-Pacheco

Figueroa

Aragón

et al. 2019

VUCSM

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Currently, textile dyeing companies determine their market according to the raw materials processed, which are based on 100% cotton fibers, these fibers are directed to an exclusive market and therefore these companies establish criteria of high quality standards in each of its processes, dyeing being one of the most demanding due to its fastness parameters and color specifications, these characteristics establish the competitiveness of expanding a product portfolio with the incursion of 100% fiber-based clothing polyester and with cotton blends.Some studies suggest the implementation of the dyeing process of these fibers, allowing the organization to have new production alternatives, dyeing processes for polyester and cotton are carried out with heat treatment between 60 °C and 130 °C respectively, with the use of dispersed and chemical dyes; as in the dyeing of Polyester-Cotton that are made in bathrooms established in each stage. Color and solidity tests are performed according to quality parameters, with light and wash fastness controls. Within these dyeing conditions it is essential to determine the thermal gradients to be applied, whose variable must be controlled to optimize the dyeing of polyester fibers and mixtures.The present study evaluates the pre-treatments and the temperature gradient behavior stage in the dyeing process of polyester fibers, taking into account the dyeing curve, in which only the temperature gradient varies. Mathis-ALT-B equipment is used for the dyeing process, for thermal gradient conditions of 135 °C with gradients of 0.3-4.0 °C/min, rotation speed 40-70 RPM, and as colorants were used Novacron, Terail and Liandisperse for cotton and polyester fibers respectively. The results show that the use of dispersants and anti-breakage agents work to prevent failures and improve the corresponding colors, but a high gradient increases the migration of the dye and breaks in the fibers, but in low gradients (2 ° C/min ) The quality of diffusion and dyeing is better and, therefore, prevents reprocessing in the dyeing stage. INFORMACIÓN

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Technological trends in the extraction of essential oils

Saldaña-Mendoza

Chávez‐González

Ramírez‐Guzmán

et al. 2022

Environmental Quality Mgmt

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Essential oils are volatile substances of an oily nature present in all plants. They are industrially used as high-value substances for their biological properties in the elaboration of various products in multiple such as pharmaceuticals, food, cosmetics, etc.Today it is known that essential oils have a composite composition and are mainly made up of hydrocarbons and oxygenated compounds, being the trace components contained in these substances, those responsible for providing the odor they possess. Commonly, essential oils are extracted through so-called conventional, where high temperatures and solvents dominate the processes. However, nowadays, multiple emerging techniques have been used to carry out its extraction to achieve better yields, preserve the integrity of the components and reduce the environmental impact that conventional extraction systems imply. This paper addresses a review of conventional systems and emerging technologies that are currently used for the extraction of essential oils.

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Enzymatic extraction of dyes for differentiation of red cotton fibres by TLC coupled with VSC

Cited by 7 publications

References 10 publications

The Identification of Cotton Fibers Dyed with Reactive Dyes for Forensic Purposes

The Identification of Cotton Fibers Dyed with Reactive Dyes for Forensic Purposes

Diffusion characteristics of dyeing in Polyester fiber garments referred to their mixtures with cotton and composition

Technological trends in the extraction of essential oils

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