Laurus Labs Quality Control Chemist Trainee Interview Questions, Process, and Tips

Chromatography is a technique used to separate and analyze mixtures of chemicals.

• It involves a stationary phase and a mobile phase

• The sample is introduced into the mobile phase and travels through the stationary phase

• Different components of the sample interact differently with the stationary phase, causing them to separate

• Common types include gas chromatography, liquid chromatography, and ion chromatography

Spectroscopy is the study of the interaction between matter and electromagnetic radiation.

• It involves the use of various instruments to measure and analyze the absorption, emission, or scattering of light by a sample.

• It is used in various fields such as chemistry, physics, astronomy, and biology.

• Examples include UV-Vis spectroscopy, infrared spectroscopy, and nuclear magnetic resonance spectroscopy.

• It can be used to id...read more

Region of UV, IR and NMR are specific ranges of electromagnetic radiation used for spectroscopic analysis.

• UV region is from 10-400 nm and is used for determining the electronic structure of molecules.

• IR region is from 4000-400 cm-1 and is used for determining the functional groups present in a molecule.

• NMR region is from 0-10 ppm and is used for determining the chemical environment of atoms in a molecule.

• Each region pr...read more

UV detects conjugated systems, IR detects functional groups, NMR detects chemical environment

• UV detects conjugated systems such as double bonds and aromatic rings

• IR detects functional groups such as carbonyl and hydroxyl groups

• NMR detects the chemical environment of atoms in a molecule

• Examples include using UV to detect the presence of a double bond in a molecule, using IR to identify the functional groups in a compoun...read more

QC Person ensures products meet quality standards by conducting tests and inspections.

• Conducting tests and inspections on raw materials, in-process samples, and finished products

• Documenting and reporting test results

• Identifying and addressing quality issues

• Ensuring compliance with regulatory requirements

• Collaborating with other departments to improve product quality

• Maintaining and calibrating laboratory equipment

• Traini...read more