Peptic Digest of Animal Tissue
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This article is compiled based on the United States Pharmacopeia (USP) – 2025 Edition
Issued and maintained by the United States Pharmacopeial Convention (USP)
(a bacteriological peptone)-Tan powder, having a characteristic, but not putrescent, odor. Soluble in water; insoluble in alcohol and in ether.
An autoclaved solution (2 in 100) is clear and is neutral or nearly so in its reaction.
LOSS ON DRYING (731)
Analysis: Dry at 100° to constant weight.
Acceptance criteria: NMT 7.0%
RESIDUE ON IGNITION (281).
Analysis: Ignite 500 mg with 1 mL of sulfuric acid.
Acceptance criteria: NMT 75 mg (15%)
Microbial Content: NMT 104 cfu/g
Nitrogen Content
Analysis: Determine by the Kjeldahl method, using a test specimen previously dried at 105° to constant weight.
Acceptance criteria: Between 9.0% and 14.0%
Amino Nitrogen: 2.7%-3.7%
