A Photoelectric Instrument for Direct Spectrochemical Analysis

Saunderson, J. L.; Caldecourt, V. J.; Peterson, Ernest W.

doi:10.1364/josa.35.000681

Cited by 67 publications

(5 citation statements)

References 4 publications

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“…Instruments have been developed previously for the direct, photoelectric measurement of light intensity at several wave lengths simultaneously (3,4,6,10). These instruments, known as Quantometers or "direct readers," use the electric spark source and are capable of determining 20 or more elements in one sample.…”

Section: Discussionmentioning

confidence: 99%

Instrumentation and Principles of Flame Spectrometry. Multichannel Flame Spectrometer

Vallée¹,

Margoshes²

1956

Anal. Chem.

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The results for the determination of copper in aluminum are shown in Table 11. Two 1.000-gram samples each of the German standard and British chemical standard 198a were dissolved and extracted directly. For the BCS 198a, all results were higher than the certificate value 0.003.The procedure for extracting the copper( I)-neocuproine complex is the same for solders and aluminum alloys. The procedures for dissolving the samples and keeping salts in solution piior to the extraction are specific for different alloys.The method has been tested in the range 0.0017 to 0.3% for copper in aluminum standard sampled and 0.004 to 0.4% copper in solder standard samples.A4 high concentration of aluminum was found to prevent the complete extraction of copper by neocuproine. The addition of hydrofluoric acid remedied this interference. When sodium fluoride \vas added instead of hydrofluoric acid, extraction of the copper complex was not complete.

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Section: Discussionmentioning

confidence: 99%

Instrumentation and Principles of Flame Spectrometry. Multichannel Flame Spectrometer

Vallée¹,

Margoshes²

1956

Anal. Chem.

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“…It would clearly be useful to construct photomultipliers sensitive to these short wavelengths and this was done by Schwetzoff (1954), who worked especially with Ag-0-Cs surfaces specially treated to destroy their long-wave sensitivity. Schwetzoff also used oxidized Be-Cu surfaces ; the secondary emission properties of this substance can be restored by simple heat treatment after exposure to air so that it is practical to connect a photomultiplier to a vacuum spectrograph without an intervening window.…”

Section: The Photocell C O M P a R E D W I T H O T H E R Photometric ...mentioning

confidence: 99%

Photoelectric photometry

Braddick

1960

Rep. Prog. Phys.

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T h e development of photoelectric devices has occasioned considerable changes in all types of instrument in which intensities are measured or compared. These devices are directly sensitive to flux and the optical systems used with them must be designed accordingly. At very low intensities the photomultiplier cell allows a light flux of only a few quanta per second to be measured and the theoretical limitations and practical arrangements are discussed. In the ultra-violet spectrum, the photoelectric technique must be revised, but efficient detectors for the whole region are known and some are described. Infra-red detection requires recourse to the ' internal ' photoelectric effect in semiconductors, and the properties of the most important detectors of the class are briefly described.f T h e efficiency of the eye and the photographic plate will be compared with that of photoelectric devices in 6 7 .

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“…These include the Applied Research Laboratories' Research Quantometer (20) and Production Control Quantometer (2), the Baird Associates-Atomic Instruments Direct. Reader (26), and the Hilger Polychromators (21). Fisher Scientific Co. and Jarrell-Ash Co. also offer this type of instrument.…”

Section: Instrumentationmentioning

confidence: 99%

Instrumentation for Rapid Spectrochemical Analysis

Kemp¹

1956

Anal. Chem.

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A Photoelectric Instrument for Direct Spectrochemical Analysis

Cited by 67 publications

References 4 publications

Instrumentation and Principles of Flame Spectrometry. Multichannel Flame Spectrometer

Instrumentation and Principles of Flame Spectrometry. Multichannel Flame Spectrometer

Photoelectric photometry

Instrumentation for Rapid Spectrochemical Analysis

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