Reference

An evaluation of some fluorescent dyes for water tracing

An evaluation of some fluorescent dyes for water tracing. Smart, P. L.; Laidlaw, I. M. S. (Dep. Geogr., Univ. Bristol, Bristol, Engl.). Water Resour. Res., 13(1), 15-33 (English) 1977. CODEN: WRERAQ. DOCUMENT TYPE: Journal CA Section: 61 (Water) Section cross-reference(s): 40 Amino G acid [86-65-7], Photine CU [61725-16-4], fluorescein [2321-07-5], Lissamine FF [2391-30-2], pyranine [6358-69-6], rhodamine B [81-88-9], rhodamine WT [37299-86-8], and Sulpho Rhodamine B [3520-42-1] were compared in lab. and field expts. to assess their utility in quant. tracing work. The properties considered included sensitivity and min. detectability, the effect of water chem. on dye fluorescence, photochem. and biol. decay rates, adsorption losses on equipment and sediments, and toxicity to man and aquatic organisms. The orange fluorescent dyes are more useful than the blue and green because of the lower background fluorescence at the orange wave band, which permits higher sensitivites to be obtained. Pyranine fluorescence is strongly affected by pH over the range encountered in natural waters. Amino G acid, Photine CU, pyranine, and fluorescein all have high photochem. decay rates. Pyranine, Lissamine FF, and amino G acid are the dyes most resistant to adsorption, but rhodamine WT, fluorescein, and Sulpho rhodamine B also have moderately high resistance. Rhodamine B is readily adsorbed by most materials. Rhodamine WT (orange), Lissamine FF (green), and amino G acid (blue) are the most suitable dyes.

New perceptions during the qualitative assessment of the fiber composition of papers

New perceptions during the qualitative assessment of the fiber composition of papers. Breunig, Anton (Diedorf D-8901, Fed. Rep. Ger.). Papier (Darmstadt), 37(10), 473-81 (German) 1983. CODEN: PAERAY. ISSN: 0031-1340. DOCUMENT TYPE: Journal CA Section: 43 (Cellulose, Lignin, Paper, and Other Wood Products) A method, based on the measurement of color developed on the treatment of pulp with a mixt. of Supranol Blue B 222 (I) [5863-46-7], Sirius Red F 3B 200 [2610-10-8], and pyranine [6358-69-6] by microscopy and of extn. of the filtrate from the reaction of pulp with I, was developed to det. the amt. of filler, mech., and chem. pulp in paper.