Parts are exposed to liquid chromatography to generate a corresponding chromatogram, wherein the chromatogram is compared to a chromatogram of a genuine part to determine if the tested part is suspect counterfeit. Depending on the selected predetermined target analytes, the generated chromatogram can be used to assess an associated manufacturing process as conforming or non-conforming.

Method and corresponding detection unit to detect bacterial activity in a biological sample, in particular, but not only, blood samples contained in a test tube with a stopper.

A method for characterizing a brake fluid, the method comprising contacting a solvent with the brake fluid to provide a sample; introducing the sample into a first capillary column coated with a first stationary phase and allowing the sample to flow through the first capillary column to produce an effluent stream; and passing the effluent stream through a detector to identify one or more hydrocarbon components and optionally a detectable borate component, wherein the first capillary column is at a temperature effective for a borate ester in the sample, if any, to react with a portion of the solvent to form the detectable borate component.

The present invention concerns a HPLC separation method useful in the synthesis of [.sup.18F]-labelled compounds, including positron emission tomography (PET) tracers. The method of the invention addresses constraints of previous methods imposed by the needs of free 5 [18F]fluoride. The present invention provides a simplified process that enables rapid separation and analysis of free [.sup.18F]fluoride and chemical impurities in the synthesis of [.sup.18F]-labelled compounds.

Methods of detecting and analyzing N-nitrosocytisine in a cytisine sample using chromatography is provided herein. N-nitrosocytisine potentially present in the cytisine sample may be detected and analyzed using mass spectrometry.

Provided is a method for measuring a measurement sample containing a hypochlorite ion by liquid chromatography mass spectrometry, the method including selecting a mass chromatogram indicating the presence of a hypochlorite ion-derived iron complex from a plurality of mass chromatograms obtained by liquid chromatography mass spectrometry to determine an abundance of the hypochlorite ion.

The present specification relates to a method for analyzing a deuterated compound by chromatography, and manufacturing an organic light emitting device using a deuterated compound selected based on the analyzed data.