Application of Pyrocatechol Violet as a Colorimetric Reagent for Tin

Ross, W.J.; White, J.C.

doi:10.1021/ac60171a034

Cited by 55 publications

(16 citation statements)

References 11 publications

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“…After separation of the sulfamate from the amine and extraction of the latter into chloroform, the figures obtained for the amine level were a factor of five to ten times too high compared to those obtainable by the more accurate GLC method (11). These erroneous figures are most likely due to inefficient separation of sulfamate and amine.…”

mentioning

confidence: 84%

Determination of small amounts of tin with 4,5-dihydroxyfluorescein by differential absorptiometry

Ambujavalli¹,

Premavathi²

1976

Anal. Chem.

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mentioning

confidence: 84%

Determination of small amounts of tin with 4,5-dihydroxyfluorescein by differential absorptiometry

Ambujavalli¹,

Premavathi²

1976

Anal. Chem.

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“…10 They found that the wavelength of maximum absorption is located at 555 nm and that the complex absorbing at that wavelength had a Sn(lV)/PV = 1/1 stoichiometry, at pH 4 in the presence of an acetate buffer. 10 They found that the wavelength of maximum absorption is located at 555 nm and that the complex absorbing at that wavelength had a Sn(lV)/PV = 1/1 stoichiometry, at pH 4 in the presence of an acetate buffer.…”

Section: Conformance To Beerfs Law For the Sn(lv):pv Complexmentioning

confidence: 99%

SPECTROPHOTOMETRY DETERMINATION OF TRACE AMOUNTS OF Sn(IV) AFTER PRECONCENTRATION ON A CHELATE FORMING RESIN

Moldovan¹,

Vladescu²

1998

Main Group Metal Chemistry

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A method for the preconcentration of trace amounts of Sn(IV), using a chelate forming resin, is proposed. The sulphonated derivative of an aromatic complexing agent-Pyrocatechol Violet (PV)-is adsorbed by a strong-base anion-exchange resin (Dowex 2x4) by simple ion-exchange. The resin containing the dye behaves like a chelating resin, able to adsorb Sn(IV) from aqueous solutions, the optimum adsorption pH being 4. A high preconcentration factor for Sn(IV) was obtained.The PV-resin was used for the preconcentration of Sn(IV) in a zinc sample. After desorption with a small volume of IM HNO3, the pH of the analyte was adjusted at pH 4 and then Sn(IV) was determined spectrophotometrically as Sn(IV):PV complex, at 555 nm. Preparation of the PV-resinAn aqueous solution of 10" 3 M PV was prepared and used to modify the Dowex 2x4 resin (CI") as described previously. 9 Thus, the anion-exchange resin Dowex 2x4(Cl") (200 mg) was stirred with 25 mL 553 Brought to you by | Purdue University Libraries

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“…A 6.38 tool din-3 solution of tris (2-ethylhexyl)phosphate [TEHP] (Fluka, Buch, Switzerland) dissolved in toluene was used for extraction studies. A 0.05% aqueous solution of pyrocatechol violet was used for the spectrophotometric determination of tin(IV) [15]. All other reagents wer e of analytical grade.…”

Section: Reagents and Chemicalsmentioning

confidence: 99%

“…The solution is transferred to a separating funnel and equilibrated for 20 s with 6.38-6.91 mol dm-3 of TEHP in toluene. After phase separation tin(IV) is stripped with water (2 x 5 cm 3) and estimated spectrophotometrically with pyrocatechol violet [15]. Add 2 cm 3 of 0.05% pyrocatechol violet adjust the pH of the solution to 2.70-3.20 (using 0.1 tool din-3 hydrochloric acid and 0.1 mol dm-3 ammonium hydroxide), make up the volume to 25 cm 3 with doubly distilled water and measure the absorbance at 557 nm.…”

Section: General Extraction Procedures For Quadrivatent Tinmentioning

confidence: 99%

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Tris(2-ethylhexyl)phosphate as an extractant for quadrivalent tin, with subsequent determination with pyrocatechol violet in alloy samples

Gaudh¹,

Shinde²

1996

Mikrochim Acta

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Abstract. The solvent extraction of tin(IV) from chloride media with tris(2-ethylhexyl)phosphate is presented. Tin(IV) is extracted quantitatively from 2.75-3.20 mol dm-3 hydrochloric acid using 6.38-6.91 mol dm-3 tris(2-ethylhexyl)phosphate dissolved in toluene as an extractant. After back-extraction of tin(IV) with water from the tris(2-ethylhexyl)phosphate phase, it is estimated spectrophotometrically following complexation with pyrocatechol violet. The recommended range for determination of tin(IV) is 10-100 ~tg. The probable extracted species is SnC14" 2TEHP. The method is applicable to the analysis of alloy samples with a detection limit of 0.4 gg/ml (for 10 gg of tin) and a relative standard deviation between 0.21-0.32%.

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Application of Pyrocatechol Violet as a Colorimetric Reagent for Tin

Cited by 55 publications

References 11 publications

Determination of small amounts of tin with 4,5-dihydroxyfluorescein by differential absorptiometry

Determination of small amounts of tin with 4,5-dihydroxyfluorescein by differential absorptiometry

SPECTROPHOTOMETRY DETERMINATION OF TRACE AMOUNTS OF Sn(IV) AFTER PRECONCENTRATION ON A CHELATE FORMING RESIN

Tris(2-ethylhexyl)phosphate as an extractant for quadrivalent tin, with subsequent determination with pyrocatechol violet in alloy samples

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