Analytical Qc Chemist Interview Questions and Answers for Freshers

HPLC and GC differ in their mobile phase, stationary phase, and sample types. GC uses a gas phase while HPLC uses a liquid phase.

• HPLC uses a liquid mobile phase while GC uses a gas mobile phase

• GC uses a packed column while HPLC uses a solid or porous stationary phase

• GC is used for volatile and semi-volatile compounds while HPLC is used for non-volatile compounds

• Chapters studied in MSC depend on the program and university

• To prepare a 1M solution of HCl, dissolve 36.5 g of HCl ...read more

Both HPLC and GC have their own advantages and limitations, and the choice depends on the specific analytical requirements.

• HPLC is better for analyzing polar and non-volatile compounds, while GC is better for analyzing volatile compounds.

• HPLC is more sensitive and can detect lower concentrations of analytes, while GC has a faster analysis time.

• The choice between HPLC and GC also depends on the sample matrix and the required separation efficiency.

• In some cases, both techniques...read more

To prepare a 1M solution, dissolve the molecular weight of the solute in 1 liter of solvent.

• Determine the molecular weight of the solute

• Measure 1 liter of solvent

• Dissolve the calculated amount of solute in the solvent

• Mix thoroughly to ensure homogeneity

UV stands for ultraviolet and the principle of UV is the absorption of light in the UV region by molecules.

• UV spectroscopy is used to determine the concentration of a substance in a sample by measuring the amount of UV light absorbed by the sample.

• The principle of UV is based on the fact that molecules absorb light in the UV region of the electromagnetic spectrum.

• UV spectroscopy is commonly used in analytical chemistry, biochemistry, and pharmaceutical analysis.