Cradel Pharmaceuticals QC Chemist Interview Questions, Process, and Tips

Principles of instrumental analysis include spectroscopy, chromatography, electrochemistry, and mass spectrometry.

• Spectroscopy involves the interaction of electromagnetic radiation with matter to determine the properties of a sample.

• Chromatography separates and identifies components of a mixture based on their physical and chemical properties.

• Electrochemistry measures the electrical properties of a sample to determine ...read more

Different parts of instruments used in quality control chemistry.

• Instruments used in quality control chemistry include spectrophotometers, chromatographs, titrators, and pH meters.

• Spectrophotometers have a light source, sample holder, and detector.

• Chromatographs have a column, injector, detector, and data system.

• Titrators have a burette, stirrer, and indicator electrode.

• pH meters have a pH electrode and reference elect...read more

Instrumental calibration procedures ensure accurate and precise measurements. Different procedures include external calibration, internal calibration, and standard addition.

• External calibration involves using a standard solution with a known concentration to calibrate the instrument.

• Internal calibration involves using a reference material that is added to the sample to ensure accurate measurements.

• Standard addition inv...read more

Titration is a technique used to determine the concentration of a substance in a solution by reacting it with a solution of known concentration.

• Acid-base titration

• Redox titration

• Complexometric titration

• Precipitation titration

• Back titration