Instrumentation: Accuracy, Precision, and LOD Concepts
16 Questions
1 Views

Choose a study mode

Play Quiz
Study Flashcards
Spaced Repetition
Chat to Lesson

Podcast

Play an AI-generated podcast conversation about this lesson

Questions and Answers

What does accuracy refer to in the context of measurement?

  • The degree to which the result of a measurement conforms to the correct value or a standard (correct)
  • The quality of being exact
  • The closeness of multiple observations to one another
  • The lowest concentration of the analyte that can be reliably detected and quantified

Which term refers to the quality of being exact and how close two or more measurements are to each other?

  • Precision (correct)
  • Limits of detection (LOD)
  • Systematic errors
  • Random errors

What are systematic errors in experimental observations primarily attributed to?

  • The closeness of multiple observations to one another
  • Unknown and unpredictable changes in the experiment
  • Inaccuracy inherent in the system (correct)
  • Measuring instruments or environmental conditions

What do random errors in experimental measurements result from?

<p>Unknown and unpredictable changes in the experiment (C)</p> Signup and view all the answers

What does precision refer to in the context of measurement?

<p>The quality of being exact and how close two or more measurements are to each other (A)</p> Signup and view all the answers

What does limits of detection (LOD) refer to in the context of measurement?

<p>The lowest concentration of the analyte that can be reliably detected and quantified (C)</p> Signup and view all the answers

What is the main cause of random errors in an experiment?

<p>Electronic noise in the circuit of an electrical instrument (B)</p> Signup and view all the answers

Which type of error can be replicated by repeating the experiment again?

<p>Systematic errors (C)</p> Signup and view all the answers

What is the purpose of a reference standard in calibration?

<p>To test the identity, strength, quality, and purity of substances (B)</p> Signup and view all the answers

What are Certified Reference Materials (CRMs) used for?

<p>All of the above (D)</p> Signup and view all the answers

When is calibration typically required?

<p>All of the above (D)</p> Signup and view all the answers

What is the goal of calibration?

<p>To quantify and control errors or uncertainties within measurement processes (D)</p> Signup and view all the answers

What are Systematic errors usually caused by?

<p>Measuring instruments that are incorrectly calibrated (A)</p> Signup and view all the answers

What is a working standard used for?

<p>A standard that is qualified against and used instead of the reference standard (A)</p> Signup and view all the answers

Which of the following is most suitable to test the identity, strength, quality, and purity of substances for Chemical, pharmaceutical, and medicinal products?

<p>Reference standards (D)</p> Signup and view all the answers

What is the comparison of measurement values delivered by a device under test with those of a calibration standard known as?

<p>Calibration traceability (D)</p> Signup and view all the answers

More Like This

Use Quizgecko on...
Browser
Browser