Handbook of the polariscope and its pracitcal applications / adapted from the German editon of H. Landolt, by D.C. Robb and V.H. Veley.

  • Hans Heinrich Landolt
Date:
1882
Catalogue details

Licence: Public Domain Mark

Credit: Handbook of the polariscope and its pracitcal applications / adapted from the German editon of H. Landolt, by D.C. Robb and V.H. Veley. Source: Wellcome Collection.

    252/320 (page 232)
    The specific rotation is increased considerably by the addition of boracic acid. On the other hand, mineral as well as organic acids diminish it, and may even convert it into dextro-rotation. Malates. Neutral malate of soda, Na2. C4 H4 05. Water, c — 15*976. t = 22. [a]D = - 7*64. Landolt. Acid malate of ammonia, N H4 . C4 H5 05. Water. Water. c = 23*025. t - 20. [a]j Nitric acid of 21° Baume. p — 26*803. t = 20. [o]j „ after addition of ammonia, lsevo-rotatory. = 6*5. t = 20. [a]D = - 6.65 Landolt. 7*22\ 5*60 Malate of lime, Ca . C4 H4 05 -f 3 H2 O. Hydrochloric acid of 9*5° Baume. p = 12*474. t = 22. [o]j = + 10*88 Ammonia (per cent. ?) p = 23*506. t = 17. [a]j =i + 4*34 Pasteur ) (A. C. P. [3] 31, 85). Antimon-ammonium malate, N H4 . Sb O . C4 H4 05. Water . . . p — 6*815. t = 17. [a]j = + 115*47 Amides of malic and tartaric acids. Pasteur, (A. C. P. [3] 38, 46G). Glutanic acid, C5 H8 05. Loevo-rotatory. Water, p = 18*81. [o]D = - 1*98. Ritthausen [Journ. fur pralct. Chem. [2] 5, 354). Glutamic acid, C5 H9 N 04. Dextro-rotatory. Dilute nitric acid, p — 5*45. t = 18. [a]D = 34*7. Ritthausen {Journ. fur prakt. Chem. [1] 107, 238). Aspartic acid, C4 H7 N 04. Dextro-rotatory in acid solutions ; laevo-rotatory in alkaline solutions. Dilute nitric acid p — 4*711- t — 20. [a]D>= + 25*16 Ritth. (a) Hydrochloric acid of 9*5° Baume p = 5*094. t = 22. [a]j = + 27*68 . pag^eiir Soda solution containing 4*84 per cent- Na30. p = 9*99. [a]j = - 2*22 ( Ammonia with 10 per cent. N H3. p = 4*02. [o]j = - 11*67 j (a) Pitthausen’s preparation from legumin {Journ. fur prakt. Chem. [1] 107, 227). {b) Pasteur’s preparation from asparagin (A. 0. P. [3] 31, 78). Asparagin, C4 H8 03. Dextro-rotatory in acid solutions ; laevo-rotatory in alkaline. Nitric acid of specific gravity 1*1102 at 22°. p — 11*08. t = 22. [a]} = + 35*09. Hydrochloric acid ,, 1*0706 at 23°. p = 11‘125. t = ? [«], = + 34*40.