Citric Acid → L-Ascorbic Acid

HRID 1155230

Reaktionsgleichung

Reaktionsgleichung von HRID 1155230
[Na].Cl([O-])(=O)=[O:3].[Na+].[C:7]([OH:19])(=O)[CH2:8][C:9]([CH2:14][C:15]([OH:17])=[O:16])(C(O)=O)[OH:10].C([O-])(=O)C[C:22](CC([O-])=O)(C([O-])=O)[OH:23].[Li+].[Li+].[Li+]>CO.O>[O:17]=[C:15]1[O:16][C@H:8]([C@H:7]([CH2:22][OH:23])[OH:19])[C:9]([OH:10])=[C:14]1[OH:3]

Komponenten

7

Edukt 4

HCID 311Citric AcidHCID 13520Lithium CitrateHCID 516902Sodium ChlorateHCID 5360545Sodium

Produkt 1

HCID 54670067L-Ascorbic Acid

Reagenzien, Katalysatoren, Lösungsmittel 2

HCID 887MethanolLösungsmittelHCID 962WaterLösungsmittel

Versuchsvorschrift

7 grams of the sodium salt of 2,18-phosphomolybdic acid, 4 grams of sodium chlorate, 40 grams of citric acid, and 13.5 grams of trilithium citrate are dissolved in a mixture of 600 ml of methanol and 380 ml of water. A filter paper, for example Type 2668, made by the Schleicher & Schull Company, is impregnated with this solution, which has a pH-value of 3.6, and is dried for 1 hour at 60° C. Pieces measuring 6×6 mm are cut from the test paper prepared in this way, and sealed between a plastic handle and a thin nylon net, according to German Pat. No. 2 118 455. In urines with ascorbic acid in the important decision range of 0-40 mg of ascorbic acid/dl of urine, these test strips give very graduated reaction colors from bright greenish-blue to dark bluish-violet.

Aufarbeitung

  1. customis dried for 1 hour at 60° C
  2. customprepared in this way
  3. customsealed between a plastic handle

Quellen und Nachweise

ORD-Eintrag
ord-d41d3a13ec7943aebedf8ccf30061f3d
Quelldatensatz
uspto-grants-1981_11
Patentnummer
US04300905

Verknüpfte Notizen

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