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A specially designed thin layer quartz rod (CHROMAROD) traverses the hydrogen flame at constant speed after developing the sample and separating its components on it. Each organic compound separated on the rod is ionized by the energy of hydrogen flame, which generates electric current proportional to the amount of substance in the flame is multiplied and thereby enables quantitative determination.  In case the organic components on the rod contain phosphorous and/or sulfur elements, they emit their inherent lights during being burnt in the hydrogen flame. After spectroscopically separated by the interference filter, those lights are multiplied by the photomultiplier in order to detect phosphorous and/or sulfur selectively.

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