Journal . Detection 0/ yUric Acid in llVi/tr.* and Suits. agrononiUiues, 1S87, 322—3i7. FoK this purpose the author dips strips of white filterpaper, free from nitric acid, into the water or soil leavingone end exposed to the air. The nitrates rise in the paperby capillarity and accumulate in. part of the exposedportion of the paper strip, which may then lie tested bymeans of phenol sulphonic acid and ammonia. If the materialbein!» tested contains a very small quantity of nitric acid,12—15 hours will he sufficient to accumulate it in 1—2 the exposed part of the paper. A
Journal . Detection 0/ yUric Acid in llVi/tr.* and Suits. agrononiUiues, 1S87, 322—3i7. FoK this purpose the author dips strips of white filterpaper, free from nitric acid, into the water or soil leavingone end exposed to the air. The nitrates rise in the paperby capillarity and accumulate in. part of the exposedportion of the paper strip, which may then lie tested bymeans of phenol sulphonic acid and ammonia. If the materialbein!» tested contains a very small quantity of nitric acid,12—15 hours will he sufficient to accumulate it in 1—2 the exposed part of the paper. All the nitrates may beremoved from solution in this manner, and 0 ? nitric acid in a litre mav be detected.—D. A. L,. acetate (containinriis in Iron 1. Jennings. En^. and Min. Journ. 45, ^5. FuOM 1 to 5 p-ms. of ore are digested witli strong hvdro-chloricacid; this almost complete solution of thetitanic acid, leaving a siliceous residue, with perhaps atrace of titanium. The unfiltered solution is diluted and 1nearly neutralised with sodium carbonate, the iron is nextreduced with sulphurous acid, 50 cc. of acetic acid areadded, and the whole is diluted to 500 cc, and boiled foran hour. The precipitate contains the whole of thetitanium wiih the iusoiuble residue, and some phosphorusand iron ; it is allowed to settle, is filtered through a ribbedfilter, and washed with a 10 per cent, acetic acid solution,which prevents the titanium from passing the filter. It is thendried, ignited and fused with 10 tim
Size: 969px × 2579px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1800, bookdecade1880, booksubjectchemist, bookyear1882
