| 单词 | georgina paper |
| 释义 | > as lemmasgeorgina paper georgina paper n. Chemistry (now disused) a kind of paper coloured violet by dahlia petals, used as a pH indicator (turning red with acids and green or yellow with alkalis). ΘΚΠ the world > matter > chemistry > chemical tests > indicators > [noun] > test papers litmus paper1803 turmeric paper1806 test-paper1827 georgina paper1843 ozone paper1861 ozone test paper1872 turmeric test-paper1880 lead-paper1890 tetra-paper1890 1843 C. R. Fresenius & H. Will New Methods Alkalimetry xiv. 58 A small portion of the fluid is then filtered off, and this filtrate tested with Georgina paper. 1863 H. M. Noad Man. Chem. Anal. I. i. 42 Georgina paper..is prepared by dipping paper into the coloured infusion of the petals of the Georgina purpurea. 1901 P. Frazer Bibliotics (ed. 3) 218 Test-papers (litmus, mauve, and Georgina paper) serve to determine whether a paper has been washed. < as lemmas |
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