Stanvac Chemicals Interview Questions and Answers

HPLC is a technique used to separate, identify, and quantify components in a mixture based on their interaction with a stationary phase and mobile phase.

• HPLC stands for High-Performance Liquid Chromatography.

• The principle of HPLC involves the separation of components in a mixture based on their affinity for the stationary phase and mobile phase.

• The instrumentation of HPLC includes a pump to deliver the mobile phase, a sample injector, a column containing the stationary phase,...read more

UV spectroscopy is a technique that uses ultraviolet light to analyze the chemical composition of substances.

• UV spectroscopy is based on the principle that molecules absorb ultraviolet light at specific wavelengths.

• The Beer-Lambert law relates the concentration of a substance to the amount of light it absorbs.

• UV spectroscopy is commonly used in pharmaceutical, environmental, and forensic analysis.

• It is used to determine the concentration of a substance, identify unknown compo...read more

Calibration of instruments is a crucial process to ensure accuracy and reliability of measurements.

• Calibration involves comparing the measurements of an instrument to a known standard.

• It helps in identifying and correcting any deviations or errors in the instrument's readings.

• Calibration ensures that the instrument is performing within acceptable limits and provides accurate results.

• It is necessary to calibrate instruments regularly to maintain their performance and reliabili...read more

GC stands for Gas Chromatography, a principle and instrumentation used for separating and analyzing volatile compounds.

• GC is a technique used in analytical chemistry to separate and identify components of a mixture.

• It involves injecting a sample into a gas chromatograph, which vaporizes the sample and carries it through a column.

• The column contains a stationary phase that interacts with the sample components, causing them to separate based on their chemical properties.

• Detecto...read more

There are three types of validations: front-end, back-end, and database. Each type requires a different approach.

• Front-end validation is done on the client-side and checks for user input errors before submitting the form.

• Back-end validation is done on the server-side and checks for errors in the data submitted by the user.

• Database validation checks for data integrity and consistency in the database.

• Handling of validation errors can be done by displaying error messages to the ...read more