Detroit Lancet Volume 8 (Paperback)

This historic book may have numerous typos and missing text. Purchasers can usually download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1885 edition. Excerpt: ... quantity. This reagent gives no precipitates with alkaloids, and the precipitate of parapeptones produced by it is redissolved by heat, so that the test, which is quite a sensitive one. is one whose indications are fairly reliable. 6. Trichloracetic acid has also been recommended as a precipitant for albumin, and the reagent possesses certain advantages which entitle it to consideration: It forms crystals which are not deliquescent, so that it can be conveniently carried in the pocket medicine case. It is used in the same way as the meta Dr. Millard states that this reagent precipitates peptones only slightly, and parapeptones not at all.--Med. Record, May. 1884. phosphoric acid, and is about equally sensitive as a reagent for albumin. It, however, precipitates parapeptones, and these cannot be discriminated by it with certainty from albumin. 7. Dr. Millard Medical Record, May 31, 1884) recommends for the certain detection of albumin, a modification of Dr.Tidy's phenic acid test. Dr. Tidy's reagent consisted of equal parts of phenic acid (carbolic acid) of 95 per cent., and glacial acetic acid. This mixture, however, produces turbidity even in distilled water. If the proportion of acetic acid is considerably increased, the reagent is more satisfactory, while the further addition of liquor potassse leaves nothing to be desired. The proportions employed in the modified test are as follows: If Acid phenic, glacial, 95 per cent, Z ii. Acid acetic, pur., J vii. Mix, and add: Liquor polassa;, 5 ii 3 vi. "It is important," the writer states, "that the glacial carbolic acid should be used, or the mixture, which should be quite clear, will be turbid." What is meant by "glacial" phenic acid, we are left to conjecture, ...