Unichem Laboratories Quality Control Analyst Interview Questions and Answers

Q1. Difference between GC and HPLC
Ans. 
GC is used for volatile compounds, while HPLC is used for non-volatile compounds.
• GC stands for Gas Chromatography, while HPLC stands for High Performance Liquid Chromatography.

• GC is used for separating and analyzing volatile compounds, such as gases and liquids that can be vaporized without decomposition.

• HPLC is used for separating and analyzing non-volatile compounds, such as pharmaceuticals, proteins, and carbohydrat...read more
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Q2. Working principle of IR,uv
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IR and UV spectroscopy are analytical techniques that utilize the absorption of infrared and ultraviolet-visible light to identify and quantify substances.
• IR spectroscopy measures the absorption of infrared radiation by a sample to identify functional groups in organic molecules.

• UV spectroscopy measures the absorption of ultraviolet-visible light by a sample to determine the presence of conjugated systems in organic co...read more
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Q1. Self introduction
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Q2. Salary discussion
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The aptitude test is based on the theory subjects in bachelor's degree, mainly it consists of MCQ'S ,the aptitude test is for 100 marks.

Group discussion is conducted for the persons who qualified the aptitude test and one topic is given to a minimum of 5-8 people

Q1. The technical round is about basics involved in different processes mainly for quality control they will ask about validation, what is assay,what is accuracy, what is precision, what is quenching, what is ...read more
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Q1. In HR round , HR will ask the family details hobbies , will discuss about package and shift timings , joining formalities, service agreement and about work culture
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Q1. Any thing to do ask
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Q1. Any questions to do you ask
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Q2. Any questions to ask
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Q3. Aduit, GMP, GHP, HACCP
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Q4. My self , my experience
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Q1. Types of detector in HPLC
Ans. 
Detectors in HPLC include UV-Vis, fluorescence, refractive index, and mass spectrometry.
• UV-Vis detector measures absorbance of UV or visible light by the analyte.

• Fluorescence detector measures fluorescence emitted by the analyte when excited by light.

• Refractive index detector measures changes in refractive index of the eluent.

• Mass spectrometry detector measures mass-to-charge ratio of ions produced from analyte.
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Q2. Uv and FTIR principle
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UV and FTIR principles are analytical techniques used for identifying and analyzing chemical compounds based on their absorption of ultraviolet-visible light and infrared radiation, respectively.
• UV spectroscopy involves measuring the absorption of UV or visible light by a sample to determine its concentration or purity.

• FTIR spectroscopy measures the absorption of infrared radiation by a sample to identify functional gr...read more
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Q1. What is Quality control
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Quality control is a process used to ensure that products or services meet specific standards and requirements.
• Quality control involves monitoring and testing products or services to identify defects or errors.

• It aims to prevent defects from reaching customers and ensure consistent quality.

• Examples of quality control methods include statistical process control, inspection, and testing.

• Quality control is essential in in...read more
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Q2. How to handle the instrument
Ans. 
Handle the instrument with care and follow proper procedures
• Always read the instruction manual before using the instrument

• Ensure the instrument is calibrated and maintained regularly

• Use the instrument only for its intended purpose

• Clean the instrument after each use to prevent contamination

• Store the instrument in a safe and secure location when not in use
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Q1. Qualification details than work knowledge as mentioned in cv
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Q2. GC and HPLC instrument
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Q1. About personal details and salary details
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Q1. Ask about technical instruments
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