Certified reference materials

High school (ages 12+)
Science & Technology

Name:

Date:

Step 1 · Read the article

Open the article and read it at the level above. Then answer the questions below in your own words.

https://smallwhale.org/articles/certified-reference-materials

Write what each word means, using the article.

Do not copy the article. Write two things you learned, the way you would explain them to a friend.

Answers below are taken from the article’s stored facts, so they match what the student read.

1. What is the primary purpose?To validate analytical measurement methods and calibrate instruments, ensuring accuracy and comparability
2. What is the certification process?Involves rigorous characterization, often through interlaboratory comparisons, and documentation of uncertainty
3. Why do scientists need Certified Reference Materials?They give a common standard that all labs can use. This makes sure that data from different places and times can be compared and trusted.
4. How do Certified Reference Materials help keep lab tests accurate?By using a CRM to calibrate instruments, scientists can check that their methods give the right numbers. The certificate shows the exact value and the uncertainty, so the instruments stay accurate.

Metrology: The scientific study of measurement, including its theory, practice, and application.
Measurement Uncertainty: A parameter, associated with the result of a measurement, that characterizes the dispersion of the values that could reasonably be attributed to the measurand.
Analytical Chemistry: The branch of chemistry concerned with the identification and quantification of chemical substances.