This decision is made based on the stability of the solution, its intended use and storage conditions. If this information is not stated in the text in a USP monograph for the particular volumetric solution, then it is up to your lab to define this frequency. You need to have experimental data to support your decision. Do not assume arbitrary frequencies.
This decision is made based on the stability of the solution, its intended use and storage conditions. If this information is not stated in the text in a USP monograph for the particular solution, buffer, etc., then it is up to your lab to define this frequency. You need to have experimental data to support your decision. Do not assume arbitrary frequencies.
The specification, quality grade and, in some cases, possible suppliers, of reagents used in any USP–NF monograph or general chapter can be found in the Reagent Specifications section of USP-NF.
The most updated information about chromatographic columns in USP can be found on the USP Chromatographic Columns Web site (sign-in required). In some cases you can also find information about alternative columns.
Yes, volumetric solutions should be standardized before use and re-standardized periodically. The frequency of re-standardization should be defined based on the stability of the solution, its intended use, and frequency of use.
Yes, you can use any other standardization procedure as far as it gives at least the same degree of accuracy as the method described in USP.
The general recommendation is at least in triplicate.
The water needs to be at least purified water.