10+ Alfanar Interview Questions and Answers

UV range is 190-400 nm, common makes include Agilent and Shimadzu, principle is based on absorption of UV light. UV calibration involves using standard solutions and adjusting wavelength and absorbance.

• UV range typically falls between 190-400 nm

• Common makes of UV instruments include Agilent and Shimadzu

• Principle of UV analysis is based on the absorption of UV light by the sample

• UV calibration involves using standard solutions of known concentrations

• Calibration includes adjust...read more

DST is used to break down the sample matrix and release water for titration, while Methanol is used as a solvent for the sample.

• DST (Di Sodium Tartrate) is used to break down the sample matrix and release water molecules for titration.

• Methanol is used as a solvent to dissolve the sample and ensure accurate titration results.

• Both DST and Methanol help in ensuring precise and reliable Karl Fischer titration results.

Functional groups in IR spectroscopy can be identified by analyzing characteristic peaks in the spectrum and comparing them to reference data.

• Identify the presence of functional groups by looking for specific peaks in the IR spectrum

• Use reference tables or databases to match the observed peaks with known functional groups

• Look for characteristic peaks such as C=O stretch for carbonyl groups, O-H stretch for alcohols, and N-H stretch for amines

• Consider the intensity and positio...read more

Chemicals commonly used in melting point calibration include naphthalene, benzophenone, and biphenyl.

• Naphthalene is commonly used as a primary standard for melting point calibration.

• Benzophenone is used as a secondary standard for melting point calibration.

• Biphenyl is another common chemical used for melting point calibration.

• Mixtures of these chemicals can also be used to create calibration standards with specific melting point ranges.

KF Reagent solutions contain chemicals like methanol, sulfur dioxide, and iodine in specific ratios for accurate moisture determination.

• KF Reagent solutions typically contain methanol as a solvent

• Sulfur dioxide is added to prevent side reactions

• Iodine is the titrant used in the Karl Fischer titration method

• The chemicals in KF Reagent solutions are carefully balanced to ensure accurate moisture determination

I use a pH meter for testing and calibrate it regularly to ensure accurate results.

• I use a pH meter to measure the acidity or alkalinity of a solution.

• Calibration involves adjusting the pH meter to ensure accurate readings.

• I calibrate the pH meter using buffer solutions of known pH levels.

• Regular calibration is important to maintain the accuracy of the pH meter.

• Examples of buffer solutions used for calibration include pH 4.01, 7.00, and 10.01 solutions.

Calibration of polarimeter is essential for accurate measurements. Sucrose is commonly used as it has a known specific rotation.

• Calibration of polarimeter involves adjusting the instrument to ensure accurate readings.

• Sucrose is often used for calibration as it has a well-known specific rotation value.

• By calibrating the polarimeter with sucrose, the instrument can accurately measure the specific rotation of other substances.

• Regular calibration ensures the reliability and accur...read more

Muffler furnace is used for controlled heating and H2SO4 is used for acid digestion in analytical testing.

• Muffler furnace provides controlled heating for accurate analysis of samples

• H2SO4 is used for acid digestion to break down samples for analysis

• Both tools are essential for accurate and precise analytical testing

I manage work pressure by prioritizing tasks, taking breaks, and seeking support when needed.

• I prioritize tasks based on urgency and importance

• I take short breaks to recharge and refocus

• I seek support from colleagues or supervisors when necessary

• I practice stress-reducing techniques such as deep breathing or meditation

• I maintain a healthy work-life balance to prevent burnout