Quick identification of polymeric dye transfer inhibitors in laundry detergents by pyrolysis-gas chromatography/mass spectrometry

Uchiyama, Toshihiko; Kawauchi, Akihiko; DuVal, D. L.

doi:10.1016/s0165-2370(98)00061-8

Cited by 15 publications

(14 citation statements)

References 2 publications

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“…The concentrations of PVP in the analyzed samples were 6.4, 0.8 and 1.4% for hair gel, detergent and tablets, respectively ( Table 2). It has been reported that the amount of PVP in hair gels is up to 8 wt% [20], in so-called "color" detergents about 0.5 wt% [8] and in tablets about 1-5 wt% [21]. Hence, the values obtained agreed very well with reported data.…”

Section: Pyrolysis Of Some Personal Care Productssupporting

confidence: 86%

“…Since PVP is used in the process of beer clarification, Cheng and Malawer used an on-line pyrolysis-GC method to test commercial beers for traces of PVP [6]. Uchiyama et al developed a method for determination of PVP in laundry detergents by on-line pyrolysis-GC/MS [7,8]. Pyrolytic methods were also utilized for determination of crosslinkers in cross-linked PVP as well as for production of some specific membranes from thermally liable PVP-containing blends [9,10].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Quantitative determination of poly(vinylpyrrolidone) by continuous-flow off-line pyrolysis-GC/MS

Antić

Kronimus

et al. 2011

Journal of Analytical and Applied Pyrolysis

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Section: Pyrolysis Of Some Personal Care Productssupporting

confidence: 86%

Section: Introductionmentioning

confidence: 99%

Quantitative determination of poly(vinylpyrrolidone) by continuous-flow off-line pyrolysis-GC/MS

Antić

Kronimus

et al. 2011

Journal of Analytical and Applied Pyrolysis

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“…To determine the influence of the terminal mPEG blocks on the performance of DTIs, two further polymers based on the DTI3 formulation were synthesized whereby the molar ratio of the mPEG block to the polyester block remained constant, but the molecular weight of each mPEG unit increased to either 750 g/mol (DTI4) or 5,000 g/mol (DTI5). Successful synthesis of the polymers was confirmed by 1 Figures S7 and S8). The two polymers were washed with indigo dye bleeding fabric and a multifibre swatch, and the ΔE values recorded.…”

Section: The Effect Of Hydrophilic Mpeg Molecular Weight On Dti Permentioning

confidence: 72%

Polymers for dye transfer inhibition in laundry applications

Boardman

Hayward

Lant

et al. 2020

J of Applied Polymer Sci

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The deposition of dyes onto lightly colored garments, or onto lighter sections of multicolored garments, during laundry results in fabric discoloration. In particular, there is a requirement to restrict indigo dye transfer between garments. Polymers may be added to detergent formulations as dye transfer inhibitors to prevent dye transfer by blocking the deposition of fugitive dyes in aqueous solution. This article reports the generation of a range of dye transfer inhibitors produced by condensation reactions that are effective in preventing the transfer of unbound indigo dye to a variety of fiber types. Key design rules relating to polymer hydrophilicity and pendant polymer functionality were established for the creation of effective dye transfer inhibitors. Remarkably, polymers at concentrations as low as 0.1 mg/ml were found to be effective in inhibiting indigo deposition on a variety of fiber types, offering great promise for their inclusion within laundry detergent formulations as dye transfer inhibitors.

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“…Na osnovu specifičnih proizvoda pirolize moguće je odrediti koncentraciju polimera. U radovima publikovanim do sada opisana je primena pirolize za analizu različitih sintetičkih polimera [1][2][3], među kojima je i široko korišćeni, vodorastvorni poli(vinilpirolidon) [4][5][6][7][8][9].…”

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“…Kako se PVP koristi u procesu bistrenja piva, Cheng i Malawer su koristili "on-line" pirolizu-GC za testiranje komercijalnih piva na tragove PVP [5]. Uchiyama je sa saradnicima razvio metodu za određivanje PVP u deterdžentima za pranje veša, koristeći "on-line" pirolizu-GC-MS [6,7]. "On-line" pirolitičke metode su takođe korišćene za određivanje koncentracije umreživača u umreženim PVP polimerima kao i za proizvodnju nekih specifičnih membrana od termonestabilnih blendi koje sadrže PVP [8,9].…”

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Quantitative determination of poly(vinylpyrrolidone) by "on-line" pyrolysis coupled to gas chromatography

Antić¹,

Antić²,

Kronimus

et al. 2012

Hem Ind

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"On-line" pyrolysis coupled with gas chromatography (GC) was performed for quantitative determination of poly(vinylpyrrolidone) (PVP) in wastewater sample. Gas chromatography-mass spectrometry (GC-MS) showed that the main product of pyrolysis of PVP, at high temperatures, is N-vinylpyrrolidone (NVP). After that, different amounts of commercial PVP were pyrolyzed in order to establish correlation between the amount of generated NVP (its GC peak area) and the initial mass of pyrolyzed PVP. GC-FID analysis was used for construction of calibration curve and for quantitative determination of PVP. Very good linear correlation was obtained between the area of NVP peak, generated during pyrolysis, and the initial mass of PVP (r2 = 0.998). Further, solutions of known concentration of PVP were prepared in destilled water ("spiked samples"). Spiked samples were preextracted with diethyl ether and n-hexane, and after that, the water-layer was evaporated and dissolved again in methanol. Analysis of pyrolysates of preextracted spiked samples showed that the "recovery" of PVP was above 96 mas%. This finding suggested that pre-extraction could be applied to reduce the concentration of organic substances that could also be pyrolyzed, and thus hinder identification and quantitative determination of PVP, without significant loss of polymer. The sample of an industrial wastewater from Pančevo, Serbia was investigated in the last part of this work. The sample was preextracted in the same way as the spiked samples and than pyrolyzed. NVP was identified by GC-MS in obtained pyrolysate, which was the evidence that PVP was present in the wastewater sample. NVP was quantified on the basis of the peak area in GC-FID chromatogram, and than the concentration of PVP in wastewater sample was calculated based on calibration curve. Concentration of PVP in industrial wastewater amounted 2.5 mg/L

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Quick identification of polymeric dye transfer inhibitors in laundry detergents by pyrolysis-gas chromatography/mass spectrometry

Cited by 15 publications

References 2 publications

Quantitative determination of poly(vinylpyrrolidone) by continuous-flow off-line pyrolysis-GC/MS

Quantitative determination of poly(vinylpyrrolidone) by continuous-flow off-line pyrolysis-GC/MS

Polymers for dye transfer inhibition in laundry applications

Quantitative determination of poly(vinylpyrrolidone) by "on-line" pyrolysis coupled to gas chromatography

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