Which of the following is not typically used in the identification of narcotics?

In the context of narcotic identification, the correct choice is one that does not commonly serve as a laboratory method or technique for analyzing substances. Spectrophotometry and gas chromatography are widely accepted scientific methods used for the qualitative and quantitative analysis of narcotic substances.

Spectrophotometry involves measuring how much a chemical substance absorbs light at different wavelengths, which can provide valuable information about the substance's identity based on its unique absorption spectrum. Gas chromatography, on the other hand, separates and analyzes compounds that can be vaporized without decomposition, making it ideal for narcotics and providing precise data on their composition.

SIRCHIE, however, is a brand known primarily for equipment used in crime scene investigations, particularly for developing fingerprints and other evidence collection tools. While it may play a role in law enforcement and forensic investigations, it is not a scientific method or technique used for the direct identification of narcotics. Therefore, it stands apart from the typical analytical methods employed in the identification of narcotic substances.