4.2.4 - Matrix Spike
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Practice Questions
Test your understanding with targeted questions
What is a matrix spike?
💡 Hint: Think about how you can test something's accuracy.
List one advantage of using matrix spikes.
💡 Hint: Consider their utility in environmental contexts.
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Interactive Quizzes
Quick quizzes to reinforce your learning
What is the purpose of a matrix spike in environmental analysis?
💡 Hint: Think about what we wish to determine regarding the analyte.
True or False: Matrix effects can lead to inaccuracies in measurements.
💡 Hint: Consider the impact of other substances present in samples.
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Challenge Problems
Push your limits with advanced challenges
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.
💡 Hint: Consider how the spike adds to the total concentration in your formula.
Design an experiment including matrix spikes for testing a soil sample suspected of contamination. List steps and potential outcomes or issues to monitor.
💡 Hint: Think of how you would control the conditions and monitor for effectiveness.
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