24. What important analytical method is employed that include analysis of standard reference materials when available, analysis by a different analytical method, analysis of "spiked" samples, and analysis of synthetic samples approximating the chemical composition of the test samples? A. Checking for Analytical Sensitivity B. Determining the Validity C. Construction of Calibration curve D. Identification of the Detection limit 25. It is considered to be the least effective control measure when it comes to minimizing danger in laboratory experimentation practice. A. Elimination B. Substitution C. Administrative controls D. Personal protective equinnment

24. What important analytical method is employed that include analysis of standard reference materials when available, analysis by a different analytical method, analysis of "spiked" samples, and analysis of synthetic samples approximating the chemical composition of the test samples? A. Checking for Analytical Sensitivity B. Determining the Validity C. Construction of Calibration curve D. Identification of the Detection limit 25. It is considered to be the least effective control measure when it comes to minimizing danger in laboratory experimentation practice. A. Elimination B. Substitution C. Administrative controls D. Personal protective equinnment

Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

Section: Chapter Questions

Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

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K 32 Uses a lamp and a flame for determining the concentrations of metal ions in solutions. a. High performance liquid chromatography b. gas chromatography c. mass spectrometry d. infrared spectroscopy e. UV/VIS spectroscopy f. atomic absorption spectroscopy g. thin layer chromatography
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The A260/A280 ratio for this sample was measured at 1.62. What does this tell you about the purity of your sample? Group of answer choices: A. this sample is pure B. this sample is somewhat pure, but might be contaminated with a substance that absorbs at 260 C. this sample is contaminated with a substance that absorbs highly at 230 D. this sample is contaminated with a substance that absorbs highly at 280
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