Light absorption spectrometry

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

doi:10.1021/ac60287a009

Cited by 11 publications

(1 citation statement)

References 32 publications

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“…Instruments suitable for this and other techniques of optical absorbance spectrometry are described in a review article by Boltz and Mellon (3). Spectrometers in general use employ monochromators which may be slowly scanned through the spectral range of interest.…”

Section: Introductionmentioning

confidence: 99%

Spectrophotometric titrations for students

Amdur¹,

Levene²

1974

J. Chem. Educ.

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The basic concepts of optical absorbance and transmission are readily demonstrated by the student in a series of colorimetric titrations carried out in a titration cell installed in a rapid scanning spectrocolorimeter. The student observes color changes in the titration cell and relates them to the spectral transmission curve of the solution, which he sees simultaneously on an oscilloscope. The process of formation of new species at each stage of the titration can be followed. The student can also readily demonstrate isosbestic points. A further method is presented for determination of the endpoint of a titration by simultaneously comparing the absorbance of the liquid at any two wavelengths in the visible region.

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Section: Introductionmentioning

confidence: 99%

Spectrophotometric titrations for students

Amdur¹,

Levene²

1974

J. Chem. Educ.

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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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Colorimetry

Parker

Boltz

1971

Modern Methods of Geochemical Analysis

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Light absorption spectrometry

Cited by 11 publications

References 32 publications

Spectrophotometric titrations for students

Spectrophotometric titrations for students

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

Colorimetry

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