Practice Matrix Spike (4.2.4) - Analyte Losses in Chemical Analysis - Environmental Quality Monitoring & Analysis, - Vol 2

Practice: Matrix Spike

Lesson 4.2.4Analyte Losses in Chemical Analysis

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8 questions

Flashcard drill
3 cards from this section. Quick, good the night before a test.
Exercise
6 questions · about 4 min · pass mark 70%. Hints available.
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Quiz
2 questions · about 1 min · pass mark 70%. Hints available.
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6 sample questions

Question 1.
What is a matrix spike?
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Think about how you can test something's accuracy.
Question 2.
List one advantage of using matrix spikes.
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Consider their utility in environmental contexts.
3Question 3.
What is the purpose of a matrix spike in environmental analysis?
- To add contaminants
- To measure recovery efficiency
- To adjust sample size
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Think about what we wish to determine regarding the analyte.
4Question 4.
True or False: Matrix effects can lead to inaccuracies in measurements.
- True
- False
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Consider the impact of other substances present in samples.
Question 5.
A water sample originally contained 4 mg/L of a pollutant. After adding a matrix spike of 1 mg/L, the final measured concentration is 5.5 mg/L. Calculate the recovery efficiency percentage.
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Consider how the spike adds to the total concentration in your formula.
Question 6.
Design an experiment including matrix spikes for testing a soil sample suspected of contamination. List steps and potential outcomes or issues to monitor.
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Think of how you would control the conditions and monitor for effectiveness.

4 more questions in this section. Enroll free to practise them all.