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I applied via Walk-in and was interviewed before Jan 2020. There was 1 interview round.
Mass spectrometry is a technique used to identify and quantify molecules based on their mass-to-charge ratio.
Electrospray ionization (ESI)
Matrix-assisted laser desorption/ionization (MALDI)
Gas chromatography-mass spectrometry (GC-MS)
Liquid chromatography-mass spectrometry (LC-MS)
Time-of-flight mass spectrometry (TOF-MS)
UV spectrometry is a technique that measures the absorption or transmission of ultraviolet light by a sample.
UV spectrometry is based on the principle that different molecules absorb UV light at specific wavelengths.
It is commonly used in analytical chemistry to determine the concentration of a substance in a sample.
UV spectrometry can be used to analyze the purity of a compound or identify unknown substances.
The instr...
To prepare 0.1 N HCl and NaOH, you need to calculate the required amount of the respective chemicals and dilute them in water.
Calculate the molar mass of HCl and NaOH
Determine the volume of solution needed
Use the formula: Normality (N) = (Number of equivalents / Volume of solution in liters)
For 0.1 N HCl, calculate the number of equivalents of HCl and dilute it to the desired volume
For NaOH, calculate the number of equ...
Quality assurance is the process of ensuring that products or services meet the desired level of quality.
It involves establishing standards and procedures to ensure that products or services meet those standards.
It includes monitoring and evaluating the quality of products or services to identify areas for improvement.
It also involves taking corrective action when necessary to address quality issues.
Examples include co...
Recall definitions
Recall: the ability to retrieve information from memory
Definition: a statement that explains the meaning of a word or phrase
Research: the systematic investigation into and study of materials and sources in order to establish facts and reach new conclusions
Associate: a person who works with others towards a common goal
Hypothesis: a proposed explanation for a phenomenon
Experiment: a scientific procedure...
The type of HPLC used depends on the specific research requirements and objectives.
There are several types of HPLC systems available, including reverse phase, normal phase, ion exchange, size exclusion, and affinity chromatography.
The choice of HPLC system depends on the properties of the analyte, such as polarity, size, charge, and affinity.
For example, reverse phase HPLC is commonly used for the separation of nonpola...
UV detectors and HPLC detectors are used in research to analyze and quantify substances.
UV detectors are commonly used in UV-visible spectroscopy to measure the absorption of light by a sample at different wavelengths.
HPLC detectors are used in high-performance liquid chromatography to detect and quantify the components of a mixture.
Common types of UV detectors include diode array detectors (DAD) and photodiode array d...
Matrix in MALDI MS system is a substance used to assist in ionization of the sample for analysis.
Matrix is a substance that absorbs energy from the laser and transfers it to the sample, causing ionization.
The choice of matrix depends on the type of sample being analyzed.
Common matrices include alpha-cyano-4-hydroxycinnamic acid (CHCA) and sinapinic acid (SA).
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I applied via Walk-in and was interviewed in Dec 2019. There was 1 interview round.
TFF is a measure of cash generated from operations, while CFF is a measure of cash generated from financing activities.
TFF stands for 'Total Funds From Operations' and measures the cash generated from a company's core business operations.
CFF stands for 'Cash Flow From Financing' and measures the cash generated from financing activities such as issuing stocks or bonds.
TFF is an important metric for evaluating a company'...
Risk assessment involves identifying potential risks and evaluating their likelihood and impact.
Identify potential risks and their likelihood of occurring
Evaluate the potential impact of each risk
Develop strategies to mitigate or manage identified risks
Regularly review and update risk assessments
Examples: financial risk assessment, cybersecurity risk assessment
posted on 4 Mar 2021
I applied via Walk-in and was interviewed in Dec 2019. There were 3 interview rounds.
I applied via Walk-in and was interviewed before Sep 2021. There were 2 interview rounds.
There are several parameters for HPLC calibration.
The parameters include accuracy, precision, linearity, range, limit of detection, and limit of quantification.
Accuracy refers to how close the measured value is to the true value.
Precision refers to the reproducibility of results.
Linearity refers to the ability of the method to produce results that are proportional to the concentration of the analyte.
Range refers to the...
Calibration parameters of UV Vis Spectrophotometer
Calibration parameters include wavelength accuracy, photometric accuracy, stray light, resolution, and noise.
Wavelength accuracy is checked using holmium oxide or didymium glass filters.
Photometric accuracy is checked using neutral density filters.
Stray light is checked using potassium dichromate or sodium iodide solutions.
Resolution is checked using holmium oxide or to...
Weight difference of two samples after ignition of ROI
ROI stands for Residue on Ignition
The weight difference is due to the loss of volatile substances during ignition
The weight loss can be used to calculate the percentage of volatile substances in the sample
This technique is commonly used in pharmaceutical and food industries
The IR region range refers to the range of wavelengths in the infrared region of the electromagnetic spectrum.
The IR region range typically spans from approximately 700 nanometers to 1 millimeter.
It is divided into three main regions: near-infrared (NIR), mid-infrared (MIR), and far-infrared (FIR).
Each region has different applications and characteristics. For example, NIR is commonly used in remote controls and optica...
UV range refers to the range of ultraviolet radiation wavelengths.
UV range is typically divided into three categories: UVA (320-400 nm), UVB (280-320 nm), and UVC (100-280 nm).
UVA is responsible for skin aging and wrinkling, while UVB causes sunburn and skin cancer.
UVC is absorbed by the ozone layer and does not reach the Earth's surface.
UV radiation can also be used for disinfection and sterilization purposes.
UV range...
I applied via Referral and was interviewed before May 2020. There were 4 interview rounds.
ALCOA and ALCOA plus are data integrity principles used in regulated industries.
ALCOA stands for Attributable, Legible, Contemporaneous, Original, and Accurate.
ALCOA plus adds the principles of Complete, Consistent, Enduring, and Available.
These principles ensure that data is reliable, traceable, and can be reproduced.
They are commonly used in industries such as pharmaceuticals, biotech, and medical devices.
Examples of...
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