Ang Lifesciences QC Chemist Interview Questions and Answers

Line clearance in compression area is essential to prevent cross-contamination and ensure product quality.

• Line clearance involves removing any previous product residues, cleaning equipment, and verifying cleanliness before starting a new batch.

• It helps prevent mix-ups, contamination, and errors during production.

• Examples of line clearance activities include visual inspection, swab testing, and documentation of cleaning...read more

HPLC calibration involves setting up the instrument to ensure accurate and reliable results.

• Prepare standard solutions of known concentrations

• Inject the standard solutions into the HPLC system

• Record the peak areas and retention times

• Compare the results to the expected values

• Adjust the instrument parameters if necessary

pH is a measure of acidity or alkalinity. UV spectroscopy is based on the absorption of UV light by molecules. Solutions can be prepared in various concentrations like normal, molar, ppm, ppb. Chemistry is the study of matter and its properties. Molality, molarity, and normality are concentration units in chemistry.

• pH measures the concentration of hydrogen ions in a solution, indicating its acidity or alkalinity.

• UV spe...read more

Preparation of solutions like Normal, Molar, ppm, ppb, etc.

• Normal solutions are prepared by dissolving a known weight of solute in a known volume of solvent.

• Molar solutions are prepared by dissolving a known number of moles of solute in a known volume of solvent.

• ppm (parts per million) solutions are prepared by dissolving a known weight of solute in a known volume of solvent and expressing the concentration in parts pe...read more