The UV spectrophotometric determination of migrated hydroquinone

Gajewska, Teresa; Kaszuba, Alicja

doi:10.14314/polimery.1999.690

Cited by 6 publications

(3 citation statements)

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“…Thus, it is very necessary to find simple and efficient analytical approaches for the determination of H 2 Q. Several analytical methods have been developed including high performance liquid chromatography[ 4 , 5 ], flow injection analysis[ 6 ], spectrophotometry[ 7 - 9 ], and electrochemistry[ 10 , 11 ] etc. In consideration of its good electrochemical activity, electro-oxidation of H 2 Q could be a competitive method for the determination of H 2 Q via recording electrochemical response[ 12 - 14 ].…”

Section: Introductionmentioning

confidence: 99%

Electrochemical determination of hydroquinone using hydrophobic ionic liquid-type carbon paste electrodes

She

Tang

Liu

et al. 2010

Chemistry Central Journal

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Three types of carbon paste electrodes (CPEs) with different liquid binders were fabricated, and their electrochemical behavior was characterized via a potassium hexacyanoferrate(II) probe. 1-Octyl-3-methylimidazolium hexafluorophosphate ionic liquid (IL) as a hydrophobic conductive pasting binder showed better electrochemical performance compared with the commonly employed binder. The IL-contained CPEs demonstrated excellent electroactivity for oxidation of hydroquinone. A diffusion control mechanism was confirmed and the diffusion coefficient (D) of 5.05 × 10-4 cm2 s-1 was obtained. The hydrophobic IL-CPE is promising for the determination of hydroquinone in terms of high sensitivity, easy operation, and good durability.

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Section: Introductionmentioning

confidence: 99%

Electrochemical determination of hydroquinone using hydrophobic ionic liquid-type carbon paste electrodes

She

Tang

Liu

et al. 2010

Chemistry Central Journal

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“…Piotrowo 3, 60-965 Poznañ, e-mail: tomasz.sterzynski@put.poznan.pl 3) Instytut Metali Nie¿elaznych Oddzia³ w Poznaniu, Centralne Laboratorium Akumulatorów i Ogniw, ul. Forteczna 12, 61-362 Poznañ, e-mail: pokora@claio.poznan.pl PET [23], hydrochinon -inhibitor polimeryzacji [24] b¹dŸ ε-kaprolaktam [25]. Wspomniane publikacje doty-cz¹ g³ównie oceny szkodliwooeci uwalniaj¹cych siê z produktu zwi¹zków dla oerodowiska lub bezpooerednio zdrowia i ¿ycia ludzi.…”

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“…Wspomniane publikacje doty-cz¹ g³ównie oceny szkodliwooeci uwalniaj¹cych siê z produktu zwi¹zków dla oerodowiska lub bezpooerednio zdrowia i ¿ycia ludzi. Rozwa¿ania te czêsto odnosz¹ siê do migracji o³owiu z rur PVC do wody [3] lub migracji zwi¹zków z opakowañ do ¿ywnooeci [20,23,24].…”

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Determination of metals’ migration from unplastified poly(vinyl chloride) exposed to accelerated ageing

Borowska¹,

Sterzyński²,

Pokora³

2010

Polimery

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Oznaczanie migracji metali z nieplastyfikowanego poli(chlorku winylu) poddanego przyspieszonemu starzeniu Streszczenie-Na podstawie nieplastyfikowanego poli(chlorku winylu) (PVC-U) z dodatkiem pigmentów, uk³adów stabilizuj¹cych oraz nape³niacza sporz¹dzono 14 mieszanin, nastêpnie poddano je przyspieszonemu starzeniu w komorze w wyniku naoewietlania promieniami UV. Metod¹ emisyjnej spektroskopii atomowej (ICP) oznaczano migracjê metali: Fe, Pb, Ca, Mn, Mg, Al, Zn, Ti, Si i Zr z wierzchniej warstwy próbki do roztworu modelowego. Ró¿nice w wyznaczonej wartooeci migracji materia³u wejoeciowego i starzonego przyjêto za stopieñ zdegradowania PVC-U. Dodatkowo badano stabilnooeae termiczn¹ próbek przed i po naoewietlaniu promieniami UV, poddano tak¿e wizualnej ocenie ich przekroje poprzeczne. S³owa kluczowe: nieplastyfikowany poli(chlorek winylu), przyspieszone starzenie, migracja metali, stabilnooeae termiczna, stopieñ degradacji. DETERMINATION OF METALS' MIGRATION FROM UNPLASTIFIED POLY(VINYL CHLORIDE) EXPOSED TO ACCELERATED AGEING Summary-14 blends of unplastified poly(vinyl chloride) (PVC-U) containing pigments, stabilizing systems and fillers were prepared (Table 1, 2) and then exposed to accelerated ageing by UV radiation in a chamber. The migration of metals: Fe, Pb, Ca, Mn, Mg, Al, Zn, Ti, Si and Zr from the sample surface layer to model liquid was determined by inductively coupled plasma atomic emission spectroscopy (ICP). The difference between the migration value of initial material and of aged one was treated as a measure of PVC-U degradation degree (Fig. 1-4). Additionally the thermal stability of the samples before and after UV irradiation was studied (Fig. 6). The cross-section of samples (Fig. 5) were visually evaluated.

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Comparative investigation on electrochemical behavior of hydroquinone at carbon ionic liquid electrode, ionic liquid modified carbon paste electrode and carbon paste electrode

Zhang

Zheng

2007

Electrochimica Acta

119

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The UV spectrophotometric determination of migrated hydroquinone

Cited by 6 publications

References 0 publications

Electrochemical determination of hydroquinone using hydrophobic ionic liquid-type carbon paste electrodes

Electrochemical determination of hydroquinone using hydrophobic ionic liquid-type carbon paste electrodes

Determination of metals’ migration from unplastified poly(vinyl chloride) exposed to accelerated ageing

Comparative investigation on electrochemical behavior of hydroquinone at carbon ionic liquid electrode, ionic liquid modified carbon paste electrode and carbon paste electrode

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