Journal of the Society of Motion Picture Engineers ( Volume: 47, Issue: 5, November 1946)

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An Improved Method for the Determination of Hydroquinone and Metol in Photographic Developers

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Publisher: SMPTE — White Plains, NY, USA
Doc Type: Journal Article
Content Type: Original Research
Abbreviated Title: J SMPE
Volume: 47, No. 5, pp. 403–408
Abstract: A new method for the quantitative chemical analysis of hydroquinone and metol is suggested that is more rapid and, in some cases, more accurate than previous methods. Molecular hydroquinone and methyl p-amino phenol are extracted from the developer at pH 8.0 to 8.5 with methyl acetate. The extract is dissolved directly in water and titrated with hydrochloric acid to determine metol, and then with iodine at pH 6.5 to 7.0 to determine the sum of the metol and the hydroquinone.
Publication Date: 1946-11-01
DOI: 10.5594/J12766
ISSN: Print: 0097-5834
Link: https://doi.org/10.5594/J12766
Author(s): H. L. Baumbach
Copyright: © 1946 Society of Motion Picture and Television Engineers, Inc.

Bibliographic Reference(s)

1 Lehmann E. Tausch E. : “Zum Chemismus der Metol-Hydrochinon entwicklung,” Photographische Korrespondent , 71 (Feb. 1935 ), p. 17 . EXTERNAL
2 Evans R. M. Hanson W. T. Jr. : “Chemical Analysis of an MQ Developer,” J. Soc. Mot. Pict. Eng. , XXXII , 3 (Mar. 1939 ), p. 307 . EXTERNAL
3 Baumbach H. L. : “The Chemical Analysis of Metol, Hydroquinone, and Bromide in a Photographic Developer,” J. Soc. Mot. Pict. Eng. , XXXIII , 5 (Nov. 1939 ), p. 517 . EXTERNAL
4 Atkinson R. B. Shaner V. C. : “Chemical Analysis of Photographic Developers and Fixing Baths,” J. Soc. Mot. Pict. Eng. , XXXIV , 5 (May 1940 ), p. 485 . EXTERNAL
5 Evans R. M. Hanson W. T. Jr. Glasoe P. K. : “Synthetic Aged Developers by Analysis,” J. Soc. Mot. Pict. Eng. , XXXVIII , 2 (Feb. 1942 ), p. 188 . EXTERNAL
6 Stott J. G. : “The Application of Potentiometric Methods to Developer Analysis,” J. Soc. Mot. Pict. Eng. , XXXIX , 1 (July 1942 ), p. 37 . EXTERNAL

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H. L. Baumbach; An Improved Method for the Determination of Hydroquinone and Metol in Photographic Developers, Journal of the Society of Motion Picture Engineers ( Volume: 47, Issue: 5, November 1946); SMPTE, 1946. Available at https://doi.org/10.5594/J12766

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H. L. Baumbach; An Improved Method for the Determination of Hydroquinone and Metol in Photographic Developers, Journal of the Society of Motion Picture Engineers ( Volume: 47, Issue: 5, November 1946); SMPTE, 1946. Available at https://doi.org/10.5594/J12766

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<span class="citation">H. L. Baumbach; <cite>An Improved Method for the Determination of Hydroquinone and Metol in Photographic Developers</cite>, Journal of the Society of Motion Picture Engineers ( Volume: 47, Issue: 5, November 1946); SMPTE, 1946. Available at <a href="https://doi.org/10.5594/J12766" target="_blank" rel="noopener">https://doi.org/10.5594/J12766</a></span>

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H. L. Baumbach; <cite id="bib-10-5594-j12766">An Improved Method for the Determination of Hydroquinone and Metol in Photographic Developers</cite>, Journal of the Society of Motion Picture Engineers ( Volume: 47, Issue: 5, November 1946); SMPTE, 1946
<span class="doi">10.5594/J12766</span>
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