2005
DOI: 10.1007/s10809-005-0079-9
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Use of triphenylmethane dyes for the spectrophotometric determination of polymer flocculants in aqueous solutions

Abstract: Water preparation and other industrial processes employ polymer flocculants, derivatives of quaternary ammonium salts, e.g., polydiallyldimethylammonium chloride (PC). The toxicity of PC requires the control of its residual concentration in tap water. As demonstrated in review [1], the problem of the rapid and reliable determination of polymer flocculants in waters is yet to be solved. A spectrophotometric procedure based on the interaction of PC with one of triphenylmethane dyes (TPM), namely, eosine is commo… Show more

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Cited by 10 publications
(10 citation statements)
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“…They are generally considered as the xenobiotic compounds, which are very recalcitrant to biodegradation [17]. Triphenylmethane dyes also function as colorants in food, cosmetic, and ink industries, as saturable absorbers in laser mode locking, as reagents in protein assays, as histological stains [16], and as indicators in spectrophotometric determinations of surfactants [18,19], metal ions [20], and fungicide [21,22]. Now, we report here an efficient and convenient procedure for the synthesis of diaminotriphenylmethane and its derivatives in the presence of HZSM5 zeolite and H 3 PW 12 O 40 as catalysts under solvent-free conditions.…”
Section: Intruductionsmentioning
confidence: 99%
“…They are generally considered as the xenobiotic compounds, which are very recalcitrant to biodegradation [17]. Triphenylmethane dyes also function as colorants in food, cosmetic, and ink industries, as saturable absorbers in laser mode locking, as reagents in protein assays, as histological stains [16], and as indicators in spectrophotometric determinations of surfactants [18,19], metal ions [20], and fungicide [21,22]. Now, we report here an efficient and convenient procedure for the synthesis of diaminotriphenylmethane and its derivatives in the presence of HZSM5 zeolite and H 3 PW 12 O 40 as catalysts under solvent-free conditions.…”
Section: Intruductionsmentioning
confidence: 99%
“…Calculations for selecting AWL were performed on model solutions using the computer program Optic-Tablet written for Microsoft Excel, the operating principle of which was discussed by us in the previous article [7].…”
Section: Experimental Partmentioning
confidence: 99%
“…The effect of systematic factors does not interfere with the analysis of the mixture by the Vierordt method if wavelengths at which deviations from optical density will be less than DA cr are selected as the AWL. Knowing the concentration of components and the absorption coefficients at the analytical wavelengths, DA cr can be established preliminarily through a computer experiment for each actual mixture.In Part 1 of this series, we proposed a new criterion for selecting the AWL that took into account the coefficient of optical density variation, i.e., the effect of random factors, in addition to the absorption coefficient [7]. This same principle may be applicable for the instance where the spectrum of the mixture contains portions with reproducible deviations from additivity.…”
mentioning
confidence: 99%
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