Journal of the Society of Motion Picture and Television Engineers ( Volume: 54, Issue: 4, April 1950)

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Note on Metol Analysis in Photographic Developers

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Publisher: SMPTE — White Plains, NY, USA
Doc Type: Journal Article
Content Type: Original Research
Abbreviated Title: J SMPTE
Volume: 54, No. 4, pp. 492–493
Abstract: The Method of Brunner, Means and Zappert<sup>1</sup> for the determination of metol in Ansco Color Positive first developer, A-502, was found by us to give a titration curve with no true inflection point. Instead, there was a region of about 0.5 ml in which the inflection might occur; therefore, the error in the determination may be quite large. By substituting acetic acid for water as solvent for the titration, and 0.1 N sulfuric or perchloric acid in acetic acid for the conventional 0.1 N hydrochloric acid, a better inflection point may be obtained. No changes except those already mentioned were made in the procedure given by Brunner, Means and Zappert.
Publication Date: 1950-04-01
DOI: 10.5594/J05235
ISSN: Print: 0898-042X
Link: https://doi.org/10.5594/J05235
Author(s): Martin IdelsonTechnical Dept., Pavelle Color Inc., New York, N.Y.
Copyright: © 1950 Society of Motion Picture and Television Engineers, Inc.

Bibliographic Reference(s)

(1) Brunner A. H. Jr. Means P. B. Jr. Zappert R. H. , “Analysis of developers and bleach for Ansco Color Film,” Jour. SMPE , vol. 53 , pp. 25 – 35 ; July, 1949 . EXTERNAL
(2) Hammett L. P. , Physical Organic Chemistry , Chap. II, McGraw-Hill , New York , 1940 . EXTERNAL
(3) Hall N. F. Conant J. B. , “A study of superacid solutions: I,” J. Amer. Chem. Soc. , vol. 49 , pp. 3047 ; 1927 . EXTERNAL

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Martin Idelson; Note on Metol Analysis in Photographic Developers, Journal of the Society of Motion Picture and Television Engineers ( Volume: 54, Issue: 4, April 1950); SMPTE, 1950. Available at https://doi.org/10.5594/J05235

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Martin Idelson; Note on Metol Analysis in Photographic Developers, Journal of the Society of Motion Picture and Television Engineers ( Volume: 54, Issue: 4, April 1950); SMPTE, 1950. Available at https://doi.org/10.5594/J05235

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<span class="citation">Martin Idelson; <cite>Note on Metol Analysis in Photographic Developers</cite>, Journal of the Society of Motion Picture and Television Engineers ( Volume: 54, Issue: 4, April 1950); SMPTE, 1950. Available at <a href="https://doi.org/10.5594/J05235" target="_blank" rel="noopener">https://doi.org/10.5594/J05235</a></span>

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<li>
Martin Idelson; <cite id="bib-10-5594-j05235">Note on Metol Analysis in Photographic Developers</cite>, Journal of the Society of Motion Picture and Television Engineers ( Volume: 54, Issue: 4, April 1950); SMPTE, 1950
<span class="doi">10.5594/J05235</span>
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