Food Analysis Techniques Quiz

Which technique separates charged molecules based on size and charge using an electric field?

• Spectrophotometry

• Electrophoresis

• Microscopy

• Chromatography

What is the primary principle of atomic force microscopy (AFM)?

• Separation of charged molecules

• Interaction of light with matter

• Measurement of surface roughness and mechanical properties

• Detection of metal ions in food

What is the main purpose of using scanning electron microscopy (SEM) in food analysis?

• Identifying chemical bonds in food samples

• Examining the surface structure and morphology of food products

• Measuring the atomic composition of food samples

• Separating food proteins based on molecular weight

Why is inductively coupled plasma mass spectrometry (ICP-MS) widely used in food analysis?

• It provides a detailed surface structure of food samples

• It detects trace elements and contaminants with high sensitivity

• It separates proteins based on charge differences

• It measures the color intensity of food samples

What is a limitation of transmission electron microscopy (TEM)?

• It cannot be used for biological samples

• It provides only low-resolution images

• It requires vacuum conditions and sample dehydration

• It is ineffective for detecting foodborne pathogens

A food scientist needs to verify the presence of allergens in a milk sample. Which technique is best suited for this analysis?

• UV-Vis Spectroscopy

• Atomic Force Microscopy

• Electrophoresis

• Infrared Spectroscopy

Which spectrometric method would be most appropriate for detecting vitamin content in fruit juices?

• Fluorescence Spectroscopy

• Scanning Electron Microscopy

• Inductively Coupled Plasma Spectrometry

• Capillary Electrophoresis

A food analysis laboratory needs to detect heavy metals in seafood. Which method is most suitable?

• UV-Vis Spectroscopy

• Atomic Absorption Spectroscopy (AAS)

• Scanning Electron Microscopy (SEM)

• Polyacrylamide Gel Electrophoresis (PAGE)

A researcher is analyzing edible oil samples for adulteration using FTIR. What does this method primarily detect?

• Protein concentration

• Functional groups in organic molecules

• Heavy metal contamination

• Surface morphology

A study comparing SEM and TEM in food microstructure analysis found that SEM provides better surface details while TEM gives internal structure details. What explains this difference?

• SEM operates in liquid environments while TEM requires a vacuum

• TEM transmits electrons through the sample while SEM scans the surface

• SEM provides lower magnification than TEM

• TEM works only for metal-containing food samples