Quiz on Chemical Analysis and Sampling

What is the first step in quantitative chemical analysis?

• Performing measurements

• Preparing the sample

• Defining the problem

• Choosing a method

Which of the following is NOT a factor to consider when choosing an analytical method?

• Time required for analysis

• Cost of analysis

• Accuracy required

• Color of the sample

What is the cornerstone of reliable analysis?

• Choosing the right equipment

• Obtaining a representative sample

• Performing necessary chemical separations

• Calibrating instruments

What is the purpose of calibration in chemical analysis?

• To eliminate interferences

• To ensure accurate measurements

• To prepare the sample

• To select the method

Which step involves obtaining a small mass of material that represents the bulk?

• Sampling

• Preparing sample

• Data interpretation

• Performing measurements

What is the main goal of a sampling plan?

• To select the right equipment

• To minimize costs

• To ensure accurate measurements

• To support the goals of an analysis

What type of analysis is performed on a sample mass greater than 0.1 g?

• Micro analysis

• Ultramicro analysis

• Macro analysis

• Semimicro analysis

What is a common source of error in sampling?

• Sample contamination

• Instrument calibration

• Method selection

• Data interpretation

Which of the following is a method of validating analytical methods?

• Sample preparation

• Instrument maintenance

• Replication

• Data collection

What is the term for species that affect the final measurement in analysis?

• Interferences

• Solvents

• Analytes

• Reagents