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Chlorine determination in photographic developer solutions using wavelength‐dispersive X‐ray fluorescence
Author(s) -
Morse Mark A.
Publication year - 1994
Publication title -
x‐ray spectrometry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.447
H-Index - 45
eISSN - 1097-4539
pISSN - 0049-8246
DOI - 10.1002/xrs.1300230506
Subject(s) - chlorine , detection limit , fluorescence , relative standard deviation , analytical chemistry (journal) , wavelength , chemistry , x ray fluorescence , matrix (chemical analysis) , cadmium , materials science , optics , chromatography , physics , optoelectronics , organic chemistry
A wavelength‐dispersive x‐ray fluorescence method is described for the determination of total chlorine in fresh and seasoned photographic developer solutions. The method uses a cadmium internal standard to correct for slight changes in the solution matrix and covers a concentration range of 15–500 mg l ‒1 chlorine. Precision studies using the method resulted in a relative standard deviation (RSD) of 0.41% (1 s ) at the 200 mg l ‒1 chlorine level and a RSD of 1.13% (1 s ) at the 50 mg l ‒1 level. The limit of detection for chlorine was found to be 5 mg l ‒1 and the limit of quantification was calculated as 15 mg l ‒1 .