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Photoelectric colorimetry V; applications of the “Sperrschicht” type photoelectric cells

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Mikrochemie

Summary

1. The “Sperrschicht” type cells have been investigated with respect to their physical properties and the conditions for precise photometry have been established.

2. In conformity with the findings of previous workers, the short circuit current was found to be proportional to the light intensity.

3. It has been shown that variations in voltage across the light source constitute one of the most important objections to the single cell method of photometry. The requisite voltage constancy is easily determined from a simple exponential law.

4. It has been found that the proper choice of filter, absorption cell thickness, and concentration of the solution will enable one to satisfyBeer’s law and greatly simplify measurements.

5. Photoelectric methods should enable the analyst to avail himself of all the advantages of colorimeter analysis and in addition increase the speed and precision of determinations. Fatigue in the observer is reduced to a minimum.

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Authors and Affiliations

  1. Contribution from the Chemical Laboratory of the Washington Square College of New York University, New York, N. Y.

    Ralph H. Müller

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  1. Ralph H. Müller
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Müller, R.H. Photoelectric colorimetry V; applications of the “Sperrschicht” type photoelectric cells. Mikrochemie 11, 353–368 (1932). https://doi.org/10.1007/BF02715299

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  • DOI: https://doi.org/10.1007/BF02715299

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