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Biomedical subjects

J C Wahlich

Publications and source records attributed to J C Wahlich.

3 recordsLinked to original sources

A practical approach to method validation in pharmaceutical analysis.

Guidelines issued by Regulatory Authorities make it clear that validation of analytical methodology is now widely required in support of registration dossiers. Although some attempts are made at defining terms and some vague indications are sometimes provided within these guidelines, no clear advice is provided on how validations should be conducted and what results should be expected. In this paper it is attempted to suggest some practical approaches to conducting validation and in particular to the determination of accuracy, linearity and limit of detection/quantitation.

Chemical Phenomena

Chromatographic system suitability tests--what should we be using?

System suitability tests are applied to chromatographic analytical methods to confirm the methods' continuing suitability for use on different occasions following their initial validation. The paper discusses the checks and controls which have traditionally been applied, questions their appropriateness and makes recommendations for others that should be considered.

Chemistry, Pharmaceutical

Chromatographic methods for determining the identity, strength and purity of ranitidine hydrochloride both in the drug substance and its dosage forms--an exercise in method selection, development, definition and validation.

The selection, development, definition and validation of selective stability-indicating procedures for high-performance liquid chromatographic and thin-layer chromatographic analyses of ranitidine hydrochloride are described. The procedures used in conjunction can be applied to the quality assurance and stability assessments of both the drug substance and its dosage forms and serve to establish the identity, strength and purity of this drug used in the treatment of peptic ulcer and related conditions.

Chromatography