DB Schenker Interview Questions and Answers

The calibration parameter of UV spectrometer, Refretometer, Melting Point, and KF Titrator are specific to each instrument.

• Calibration parameter is a value used to adjust and validate the accuracy of an instrument.

• UV spectrometer calibration parameter may include wavelength accuracy and intensity calibration.

• Refretometer calibration parameter may include refractive index calibration.

• Melting Point instrument calibration parameter may include temperature accuracy calibration.

• KF...read more

LC-MS/MS is a technique used for the identification and quantification of small molecules in complex samples. Method validation ensures accuracy and precision of the results.

• LC-MS/MS combines liquid chromatography and mass spectrometry to separate and detect molecules in a sample

• Method validation involves testing the accuracy, precision, specificity, and sensitivity of the analytical method

• Validation parameters include linearity, limit of detection, limit of quantification, a...read more

Determination of dithiocarbomates in agricultural sample

• Use liquid chromatography-mass spectrometry (LC-MS) for analysis

• Sample preparation involves extraction with organic solvents

• Derivatization with a reagent like 2-mercaptobenzothiazole may be necessary

• Quantification can be done using external or internal standards

• Dithiocarbomates are commonly used as fungicides and pesticides in agriculture

Determining pesticides in food samples requires specialized analytical techniques and equipment.

• Analytical techniques such as gas chromatography and mass spectrometry are commonly used to detect and quantify pesticides in food samples.

• Sample preparation is a critical step in the analysis of pesticides in food samples, as it can affect the accuracy and precision of the results.

• Regulatory agencies such as the FDA and EPA have established maximum residue limits for pesticides in...read more

Melamine in milk and milk products can be determined using various analytical techniques.

• High-performance liquid chromatography (HPLC) is a commonly used method for melamine detection.

• Enzyme-linked immunosorbent assay (ELISA) is another method used for melamine detection.

• Gas chromatography-mass spectrometry (GC-MS) can also be used for melamine detection.

• Sample preparation is an important step in melamine detection, including extraction and clean-up.

• Regulatory agencies have s...read more

Nitrofurons in fish can be determined through various analytical methods.

• Analytical methods such as HPLC, LC-MS/MS, and GC-MS can be used to determine nitrofurons in fish.

• Sample preparation techniques such as solid-phase extraction and QuEChERS can be used to extract nitrofurons from fish tissue.

• The detection limit for nitrofurons in fish can vary depending on the analytical method used.

• Regulatory agencies such as the FDA and EU have established maximum residue limits for nit...read more

Aflatoxin in food can be determined through various methods such as ELISA, HPLC, and LC-MS/MS.

• Aflatoxin is a toxic substance produced by certain molds that can contaminate food products.

• ELISA (enzyme-linked immunosorbent assay) is a common method for detecting aflatoxin in food samples.

• HPLC (high-performance liquid chromatography) and LC-MS/MS (liquid chromatography-tandem mass spectrometry) are also used for aflatoxin analysis.

• Regulatory agencies such as the FDA and EU have ...read more

PGR sample determination involves selecting appropriate plant tissues and using appropriate methods for extraction and analysis.

• Select plant tissues based on the type of analysis required

• Use appropriate extraction methods such as homogenization or solvent extraction

• Analyze the extracted sample using techniques such as ELISA or PCR

• Ensure proper storage and handling of samples to prevent degradation