| 摘要 |
PCT No. PCT/GB93/00049 Sec. 371 Date Sep. 28, 1994 Sec. 102(e) Date Sep. 28, 1994 PCT Filed Jan. 11, 1993 PCT Pub. No. WO93/14399 PCT Pub. Date Jul. 22, 1993.The detector which provides a detectable indication of the presence of an elevated proportion of carbon dioxide compared to that in normal ambient air, comprises a substrate coated by an intimate mixture of a transparent plasticised polymer vehicle, and an indicator material which undergoes a color change on exposure to carbon dioxide. The indicator material comprises an anionic fluorimetric dye and a lipophilic organic quaternary cation. |
