Xylene Cyanol

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T Kiran N Kumar - One of the best experts on this subject based on the ideXlab platform.

  • rapid and sensitive spectrophotometric determination of trace amounts of iron iii using leuco Xylene Cyanol ff
    Analytical and Bioanalytical Chemistry, 2003
    Co-Authors: T Kiran N Kumar, H D Revanasiddappa
    Abstract:

    A new, simple, sensitive, and reliable method is presented for the rapid spectrophotometric determination of trace amounts of iron(III) using leuco Xylene Cyanol FF. The method is based on the oxidation of leuco Xylene Cyanol FF (LXCFF) to its blue form of Xylene Cyanol FF by iron(III) in sulfuric acid medium (pH 2.0–3.0), the absorbance of the formed dye is measured in an acetate buffer medium (pH 2.8–4.4) at 615 nm. The method obeys Beer's law over a concentration range of 0.15–0.9 μg mL-1 iron, having a molar absorptivity of 5.6×104 L mol-1 cm-1 and a Sandell's sensitivity of 0.0001 μg cm-2. The optimum reaction conditions and other analytical parameters have been evaluated. The developed method has been successfully applied to the determination of iron in water, soil, industrial effluent, plant material, pharmaceutical preparations, synthetic mixtures, and aluminum alloys.

  • a highly sensitive spectrophotometric determination of chromium using leuco Xylene Cyanol ff
    Talanta, 2003
    Co-Authors: H D Revanasiddappa, T Kiran N Kumar
    Abstract:

    A new, simple, highly sensitive and rapid spectrophotometric method has been described for the determination of platinum(IV). The method is based on the oxidation of leuco Xylene Cyanol FF (LXCFF) to its blue form of Xylene Cyanol FF by platinum(IV) in sulfuric acid medium (pH 1.0–2.5), the formed dye shows an absorption maximum at 620 nm in acetate buffer medium (pH 3.0–4.5). The method obeys Beer's law over a concentration range of 0.3 to 2.6 µg mL–1 platinum, having molar absorptivity and Sandell's sensitivity of 5.1×104 L mol–1 cm–1 and 0.0038 µg cm–2, respectively. The optimum reaction conditions and other analytical parameters have been evaluated. The developed method has been successfully applied to the determination of platinum in pharmaceutical preparations, soil, natural water, plant material, platinum-containing catalyst, and synthetic alloy samples.

  • a highly sensitive spectrophotometric determination of platinum iv using leuco Xylene Cyanol ff
    Analytical and Bioanalytical Chemistry, 2003
    Co-Authors: H D Revanasiddappa, T Kiran N Kumar
    Abstract:

    A new, simple, highly sensitive and rapid spectrophotometric method has been described for the determination of platinum(IV). The method is based on the oxidation of leuco Xylene Cyanol FF (LXCFF) to its blue form of Xylene Cyanol FF by platinum(IV) in sulfuric acid medium (pH 1.0–2.5), the formed dye shows an absorption maximum at 620 nm in acetate buffer medium (pH 3.0–4.5). The method obeys Beer's law over a concentration range of 0.3 to 2.6 µg mL–1 platinum, having molar absorptivity and Sandell's sensitivity of 5.1×104 L mol– 1 cm–1 and 0.0038 µg cm–2, respectively. The optimum reaction conditions and other analytical parameters have been evaluated. The developed method has been successfully applied to the determination of platinum in pharmaceutical preparations, soil, natural water, plant material, platinum-containing catalyst, and synthetic alloy samples.

H D Revanasiddappa - One of the best experts on this subject based on the ideXlab platform.

  • rapid and sensitive spectrophotometric determination of trace amounts of iron iii using leuco Xylene Cyanol ff
    Analytical and Bioanalytical Chemistry, 2003
    Co-Authors: T Kiran N Kumar, H D Revanasiddappa
    Abstract:

    A new, simple, sensitive, and reliable method is presented for the rapid spectrophotometric determination of trace amounts of iron(III) using leuco Xylene Cyanol FF. The method is based on the oxidation of leuco Xylene Cyanol FF (LXCFF) to its blue form of Xylene Cyanol FF by iron(III) in sulfuric acid medium (pH 2.0–3.0), the absorbance of the formed dye is measured in an acetate buffer medium (pH 2.8–4.4) at 615 nm. The method obeys Beer's law over a concentration range of 0.15–0.9 μg mL-1 iron, having a molar absorptivity of 5.6×104 L mol-1 cm-1 and a Sandell's sensitivity of 0.0001 μg cm-2. The optimum reaction conditions and other analytical parameters have been evaluated. The developed method has been successfully applied to the determination of iron in water, soil, industrial effluent, plant material, pharmaceutical preparations, synthetic mixtures, and aluminum alloys.

  • a highly sensitive spectrophotometric determination of chromium using leuco Xylene Cyanol ff
    Talanta, 2003
    Co-Authors: H D Revanasiddappa, T Kiran N Kumar
    Abstract:

    A new, simple, highly sensitive and rapid spectrophotometric method has been described for the determination of platinum(IV). The method is based on the oxidation of leuco Xylene Cyanol FF (LXCFF) to its blue form of Xylene Cyanol FF by platinum(IV) in sulfuric acid medium (pH 1.0–2.5), the formed dye shows an absorption maximum at 620 nm in acetate buffer medium (pH 3.0–4.5). The method obeys Beer's law over a concentration range of 0.3 to 2.6 µg mL–1 platinum, having molar absorptivity and Sandell's sensitivity of 5.1×104 L mol–1 cm–1 and 0.0038 µg cm–2, respectively. The optimum reaction conditions and other analytical parameters have been evaluated. The developed method has been successfully applied to the determination of platinum in pharmaceutical preparations, soil, natural water, plant material, platinum-containing catalyst, and synthetic alloy samples.

  • a highly sensitive spectrophotometric determination of platinum iv using leuco Xylene Cyanol ff
    Analytical and Bioanalytical Chemistry, 2003
    Co-Authors: H D Revanasiddappa, T Kiran N Kumar
    Abstract:

    A new, simple, highly sensitive and rapid spectrophotometric method has been described for the determination of platinum(IV). The method is based on the oxidation of leuco Xylene Cyanol FF (LXCFF) to its blue form of Xylene Cyanol FF by platinum(IV) in sulfuric acid medium (pH 1.0–2.5), the formed dye shows an absorption maximum at 620 nm in acetate buffer medium (pH 3.0–4.5). The method obeys Beer's law over a concentration range of 0.3 to 2.6 µg mL–1 platinum, having molar absorptivity and Sandell's sensitivity of 5.1×104 L mol– 1 cm–1 and 0.0038 µg cm–2, respectively. The optimum reaction conditions and other analytical parameters have been evaluated. The developed method has been successfully applied to the determination of platinum in pharmaceutical preparations, soil, natural water, plant material, platinum-containing catalyst, and synthetic alloy samples.

  • spectrophotometric determination of cerium with leuco Xylene Cyanol ff
    Analytical Sciences, 2002
    Co-Authors: H D Revanasiddappa, Telangusadhushetty Kiran N Kumar
    Abstract:

    Cerium is traditionally referred to as one of the “rare earths”, but is in fact more plentiful in the earth’s crust than many other elements, including lead. 1,2 It is also the most widely distributed of the “rare earths”, averaging 22 ppm in the earth’s crust. 3 Cerium is industrially important and is used in nuclear reactors; in alloys with nickel and chromium; and in microwave devices, lasers, masers, and in television sets. 1,2 Cerium is also used in agriculture, forestry and animal husbandry, and much attention is now being paid to the study of cerium in the environment. 4 The cerium content of seawater is of the order of 0.0015 ppb; 5 in the edible portions of oysters and clams it has been known to concentrate to levels 100-times and 1000-times higher, respectively, than in seawater. 6 Inhalation exposures of cerium in humans have been known to cause sensitivity to heat, itching, and an increased awareness of odor and taste.

Longfei Cai - One of the best experts on this subject based on the ideXlab platform.

  • determination of iron and aluminum based on the catalytic effect on the reaction of Xylene Cyanol ff with hydrogen peroxide and potassium periodate
    Journal of the Brazilian Chemical Society, 2011
    Co-Authors: Longfei Cai
    Abstract:

    Um metodo simples, sensivel e seletivo para determinacao simultânea de tracos de ferro e aluminio por espectrofotometria catalitica foi desenvolvido. Esse metodo baseia-se nos efeitos cataliticos de ferro e aluminio sobre a reacao de xileno cianol FF com peroxido de hidrogenio e periodato de potassio. Ferro e aluminio nao apresentaram efeitos cataliticos sobre a reacao de oxidacao do xileno cianol FF em meio contendo apenas peroxido de hidrogenio ou apenas periodato de potassio. Entretanto, foram obtidos efeitos cataliticos significativos de ferro e aluminio quando ambos oxidantes foram usados simultaneamente. Graficos de calibracao linear foram obtidos no intervalo de 3,57 × 10-8 a 3,57 × 10-7 mol L-1 para Fe e de 1,48×10-7 a 1,48 ×10-6 mol L-1 para Al. Os limites de deteccao, baseados no criterio de 3 vezes o desvio padrao, foram 1,50 × 10-8 mol L-1 para Fe e 6,10 × 10-8 mol L-1 para Al. Este metodo foi aplicado para determinacao simultânea de tracos de ferro e aluminio em agua de torneira, agua de lago, de rio e folhas de cha sem etapas de separacao e pre-concentracao. Os teores de Fe e Al em aguas de torneira, lago e rio foram 3,13 × 10-7, 3,21 × 10-7 e 2,74 × 10-7 mol L-1 para Fe e 1,31 × 10-6, 9,83 × 10-7 e 1,43 × 10-6 mol L-1 para Al, respectivamente. As quantidades de Fe e Al nas folhas de cha foram 3,10 × 102 µg g-1 Fe e 7,37 × 102 µg g-1 Al. Estudos complementares sao necessarios para o entendimento do mecanismo catalitico do ferro e aluminio nesta reacao de oxidacao inedita.

  • simultaneous determination of trace iron and aluminum by catalytic spectrophotometry based on a novel oxidation reaction of Xylene Cyanol ff
    Analytical Sciences, 2008
    Co-Authors: Longfei Cai
    Abstract:

    A new, simple, sensitive and selective method for the simultaneous determination of trace iron and aluminum by catalytic spectrophotometry was presented, based on the catalytic effects of iron and aluminum on the discoloring reaction of Xylene Cyanol FF proceeded by hydrogen peroxide and potassium periodate in weak nitric acid medium. No catalytic effect was obtained in the presence of hydrogen peroxide or potassium periodate only. With the conditional rate constants determined in reaction systems catalyzed by Al or Fe only, the concentrations of Fe and Al in the samples can be calculated. The method was applied to the simultaneous determination of trace Fe and Al in tap water, lake water, river water and tea leaves without separation and preconcentration.

Kiran Kumar T. N. - One of the best experts on this subject based on the ideXlab platform.

  • A highly sensitive spectrophotometric determination of chromium using leuco Xylene Cyanol FF
    'Elsevier BV', 2003
    Co-Authors: Revanasiddappa H. D., Kiran Kumar T. N.
    Abstract:

    A highly sensitive and selective spectrophotometric method was developed for the determination of trace amounts of chromium with leuco Xylene cynaol FF. The method is based on the oxidation of leuco Xylene Cyanol FF (LXCFF) to its blue form of Xylene Cyanol FF by chromium(VI) in sulphuric acid medium (pH 1.2–2.4), the absorbance of the formed dye is measured in an acetate buffer medium (pH 3.0–4.6) at 615 nm. The method obeys Beer's law in the concentration range of 0.05–0.45 μg ml−l chromium, having molar absorptivity and Sandell's sensitivity of 8.23×104 l mol−1 cm−l and 0.00063 μg cm−2, respectively. All the variables were studied in order to optimise the reaction conditions. The developed method has been successfully applied to the determination of chromium in steels, pharmaceutical samples, industrial effluents, natural water, and soil

B Narayana - One of the best experts on this subject based on the ideXlab platform.

  • a highly sensitive spectrophotometric method for the determination of iodate using leuco Xylene Cyanol ff
    Acta Chimica Slovenica, 2006
    Co-Authors: Chand Pasha, B Narayana
    Abstract:

    A highly sensitive and selective spectophotometric method has been developed for the determination of iodate (IO 3 - ) in table salt and sea water. The proposed method is based on the oxidation of leuco Xylene Cyanol FF (LXCFF) to its blue form of Xylene Cyanol FF by iodate in sulfuric acid medium, the absorbance of the dye is measured in an acetate buffer medium (pH 4.0) at 620 nm. Beer's law is obeyed in the range 0.4-14 μg mL -1 of iodate. The molar absorptivity, Sandell's sensitivity, detection limit and quantitation limit of the method were found to be 1.71 × 10 4 Lmol -1 cm -1 , 1.02 x 10 -2 μg cm -2 , 0.026 μg mL -1 and 0.0806 μg mL -1 respectively. The optimum reaction conditions and other analytical conditions were evaluated. The effect of interfering ions on the determination is described. The proposed method has been successfully applied to the determination of the iodate in the table salt and sea water.