paper-tape chemical analyzer

paper-tape chemical analyzer

[′pā·pər ¦tāp ′kem·ə·kəl ′an·ə‚līz·ər]
(analytical chemistry)
Chemically treated paper tape that is continuously unreeled, exposed to the sample, and viewed by a phototube to measure the color change that is empirically related to changes in the sample's chemical composition.