Covalent Laboratories Analytical Chemist Interview Questions and Answers

pH is a measure of the acidity or alkalinity of a solution.

• pH stands for 'potential of hydrogen'.

• It is a logarithmic scale ranging from 0 to 14.

• A pH of 7 is considered neutral, below 7 is acidic, and above 7 is alkaline.

• pH is determined by the concentration of hydrogen ions in a solution.

• Examples: Lemon juice has a pH of around 2, while baking soda has a pH of around 9.

PH represents the concentration of hydrogen ions in a sample.

• PH is measured on a scale of 0-14, with 7 being neutral.

• A lower PH indicates higher acidity, while a higher PH indicates higher alkalinity.

• PH can be measured using a PH meter or through chemical indicators.

• The PH of a sample can affect its chemical properties and reactions.

LOD stands for Limit of Detection. It is the lowest concentration of a substance that can be reliably detected.

• LOD is used to determine the sensitivity of an analytical method.

• It is usually expressed as a concentration or mass.

• Water is a chemical compound composed of hydrogen and oxygen, while LOD is a term used in analytical chemistry.

• LOD is important in environmental testing to determine the presence of contaminants ...read more

MSDS stands for Material Safety Data Sheet. It provides information about the hazards, handling, storage, and emergency procedures for a chemical substance.

• MSDS is a document that contains detailed information about a chemical substance.

• It includes information about the physical and chemical properties of the substance.

• MSDS provides instructions for safe handling, storage, and disposal of the substance.

• It also includes...read more

The type of work permit required depends on the country and the nature of the work.

• The type of work permit may vary based on the duration of the work

• Some countries may require a specific type of work permit for certain professions

• Employers may sponsor work permits for their employees

• Examples of work permits include H-1B visa in the US, Tier 2 visa in the UK, and Blue Card in the EU

The temperature and humidity of the PPA area should be controlled and monitored to ensure proper storage conditions.

• Temperature should be maintained between 20-25°C

• Humidity should be maintained between 40-60%

• Excessive temperature or humidity can lead to degradation of PPA

• Regular monitoring and recording of temperature and humidity levels is necessary

UPLC stands for Ultra Performance Liquid Chromatography.

• UPLC is a technique used in analytical chemistry to separate, identify, and quantify components in a mixture.

• It is an advanced form of liquid chromatography that utilizes smaller particle sizes and higher pressures for faster and more efficient separations.

• UPLC is commonly used in pharmaceutical, environmental, and food analysis.

• It offers improved resolution, sens...read more