0.1 N Cupric Nitrate VS
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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)
Dissolve 23.3 g of cupric nitrate 2.5 hydrate, or 24.2 g of the trihydrate, in water to make 1000 mL.
Standardization
See Volumetric Solutions, 1. Introduction. (USP 1-May-2024)
See Titrimetry 〈541〉.
Standardize by the following procedure. [Note—Other standardization procedures may be used. See Volumetric Solutions, 2. Preparation and Standardization, 2.3 Standardization.]
Standardization with potentiometric endpoint: (USP 1-May-2024) Transfer 20.0 mL of the solution to a 250-mL beaker. Add 2 mL of 5 M sodium nitrate, 20 mL of ammonium acetate TS, and sufficient water to make 100 mL. Titrate with 0.05 M edetate disodium VS. Determine the endpoint potentiometrically using a copper ion-selective electrode. Perform a blank determination, and make any necessary correction.
N = ((mL sample − mL blank) × M Edetate disodium) / 20.0
[Note - If this volumetric solution is used in a qualitative application such as pH adjustment, dissolution medium, or diluent, its standardization is not required.]
