Light Absorption Spectrometry

Boltz, D. F.; Mellon, M. G.

doi:10.1021/ac60237a022

Cited by 12 publications

(2 citation statements)

References 69 publications

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“…One type of these sensors utilizes the fact that the absorption spectrum of the dye molecule is modified in the presence of an analyte, resulting in the a decrease of the overlapping integral value and an increase of in the QD PL intensity [3]. A variety of such these organic dye molecules are used as indicators in quantitative colorimetric analysis of metal ions in water solutions [4]. Alternatively, the presence of the an analyte may result in the dissociation of the QD/molecule complex that causes theand a resultant increase in the QD PL intensity [5].…”

Section: Qd Luminescence In These Qd/molecule Sensors Is Initially Qumentioning

confidence: 99%

Dissociative CdSe/ZnS quantum dot-molecule complex for luminescent sensing of metal ions in aqueous solutions

Баранов

Орлова

Маслов

et al. 2010

Journal of Applied Physics

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Section: Qd Luminescence In These Qd/molecule Sensors Is Initially Qumentioning

confidence: 99%

Dissociative CdSe/ZnS quantum dot-molecule complex for luminescent sensing of metal ions in aqueous solutions

Баранов

Орлова

Маслов

et al. 2010

Journal of Applied Physics

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“…Many complexation reactions of platinum with different ligands were investigated for the development of spectrophotometric reagents for platinum. Beamish (1966); Beamish and Van Loon (1972); Boltz et al (1966Boltz et al ( , 1968Boltz et al ( , 1970Boltz et al ( , 1972Boltz et al ( , 1974Boltz et al ( , 1976; Howell et al (1978Howell et al ( , 1980Howell et al ( , 1982Howell et al ( , 1984 have reviewed the spectrophotometric methods for the determination of platinum. A survey of literature reveals that a large number of reagents are suitable, either directly or after extraction into a suitable solvent.…”

Section: Introductionmentioning

confidence: 99%

Spectrophotometric determination of platinum(IV) in alloys, complexes, environmental, and pharmaceutical samples using 4-[N,N-(diethyl)amino] benzaldehyde thiosemicarbazone

Naik

Karthikeyan

Shetty

2010

Environ Monit Assess

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4-[N,N-(Diethyl)amino] benzaldehyde thiosemicarbazone (DEABT) is proposed as an analytical reagent for the spectrophotometric determination of platinum(IV). The DEABT forms 1:2 yellow complex with Pt(IV), which is sparingly soluble in water and completely soluble in water-ethanol-DMF medium. The Pt(IV)-DEABT complex shows maximum absorbance at 405 nm. Beer's law is valid up to 7.80 μg cm(-3), and optimum concentration range for the determination of platinum(IV) is 0.48-7.02 μg cm(-3). The molar absorptivity and Sandell's sensitivity of the method are found to be 1.755 × 10(4) dm(3) mol(-1) cm(-1) and 0.0012 μg cm(-2), respectively. The relative error and coefficient of variation (n=6) for the method does not exceed ± 0.43% and 0.35%, respectively. Since the method tolerates a number of metal ions commonly associated with platinum, it can be employed for the determination of platinum in environmental samples, pharmaceutical samples, alloys, catalysts, and complexes. The method is rapid as the Pt(IV)-DEABT complex is soluble in water-ethanol-DMF medium and not requiring any time consuming extraction method for the complex.

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2‐Methyl‐1, 4‐Naphthoquinone Thiosemicarbazone as a Sensitive and Selective Chromogenic Reagent for Microdetermination of Palladium (II)

Kamini

Singh

Sindhwani

et al. 1982

J Chinese Chemical Soc

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A simple, sensitive and selective procedure has been developed for the spectrophotometric determination of palladium. Palladium (II) reacts with 2‐methyl‐1,4‐naphthoquinone thiosemicarbazone to form an orange brown complex in the pH range 8.2–9.5. The sensitivity, in terms of Sandell's definition, is 0.0025 μg Pd/cm2 at 500 nm. The system adheres to Beer's law upto 2.66 ppm of palladium and optimum concentration range for the determination of the metal is 0.3–2.29 ppm with molar absorbtivity of 4.2×104 ℓ mole−1 cm−1. The complex has 1:1 molar composition, as deduced by Job's method. The determination of palladium has been carried out in presence of foreign ions especially in presence of eighth group metals.

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Light Absorption Spectrometry

Cited by 12 publications

References 69 publications

Dissociative CdSe/ZnS quantum dot-molecule complex for luminescent sensing of metal ions in aqueous solutions

Dissociative CdSe/ZnS quantum dot-molecule complex for luminescent sensing of metal ions in aqueous solutions

Spectrophotometric determination of platinum(IV) in alloys, complexes, environmental, and pharmaceutical samples using 4-[N,N-(diethyl)amino] benzaldehyde thiosemicarbazone

2‐Methyl‐1, 4‐Naphthoquinone Thiosemicarbazone as a Sensitive and Selective Chromogenic Reagent for Microdetermination of Palladium (II)

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