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- 1. Multiple Choice
Which of the following is NOT a definition of Standard Solution?
these are materials containing a precisely known concentration of a substance for use in quantitative analysis.
it cannot be prepared from solid or solution from know concentration
it composes of primary, secondary and tertiary standards
it can be a reference used to determine the unknown concentrations or to calibrate analytical instruments
- 2. Multiple Choice
Which of the following is NOT a property of Primary Standard?
very pure
less reactive
high molecular weight
hygroscopic
- 3. Multiple Choice
It is prepared in the laboratory for a specific analysis. It is usually standardized against a primary standard.
secondary analysis
primary solution
secondary standard
primary standard
- 4. Multiple Choice
What is the meaning of SRM?
Standard Reference Measurements
Secondary Reference Measurements
Standard Reference Materials
Secondary Reference Materials
- 5. Multiple Choice
"Elements in foods and beverages (e.g. milk powder, wheat flour)" is under what SRM category?
chemical composition
physical properties
engineering materials
agricultural materials
- 6. Multiple Choice
Secondary standard are highly pure than primary standard?
true
false
- 7. Multiple Choice
Standard curve allows for determination of the amount of a chemical in a material by comparing the results of unknown sample to those of a series of known standards.
true
false
- 8. Multiple Choice
Direct Calibration is a very commonly used standardization method.
true
false
- 9. Multiple Choice
Multi-standard can find in many very well-established methods for environmental samples analysis.
true
false
- 10. Open Ended
What is the importance of using
standards as reference for identifying unknown concentrations and in calibrating
analytical instruments.
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