Sampling Methods Quiz

What is the primary objective of sample selection?

• To ensure that the properties of the laboratory sample are representative of the properties of the population.

• To reduce the time and expense of analysis.

• To select a limited number of samples for analysis.

• To develop a sampling plan.

What factors should be considered when developing a sampling plan?

• Purpose of the analysis

• Nature of the total population

• Type of analytical technique used

• All of the above

What is the difference between a finite and an infinite population?

What is a homogeneous population?

What methods can be used for homogenization?

• Mechanical devices

• Enzymatic methods

• Chemical methods

• All of the above

What is the purpose of sample preparation?

What are the methods for preventing changes in a sample?

• Enzymatic Inactivation

• Lipid Protection

• Microbial Growth Control

• Physical Changes Control

What are the two interrelated concepts in food analysis that deal with acidity?

• pH and Titratable acidity

• Acid and Base

• Organic and Inorganic Acids

• Flavor and Color

What is the importance of determining food acidity?

• Determine the degree of maturity of fruits and vegetables

• Determine the freshness of foods

• Determine the microbial fermentation process

• All of the above

What are the categories of titrimetry?

• Acid-base titrations

• Complexometric titrations

• Redox titrations

• Precipitation titrations