calibrator sera are.. primary standards

calibrator sera are?

• secondary standards
• internal standards
• primary standards***

Calibrator sera are secondary standards.

Primary standards are the most accurate type of standard, but they can be expensive and difficult to produce. Secondary standards are calibrated against primary standards. They are less accurate than primary standards, but they are more affordable and easier to produce.

Tertiary standards are calibrated against secondary standards. They are the least accurate type of standard, but they are also the most affordable and easiest to produce.

Internal standards are used in analytical chemistry to quantify the amount of a substance in a sample. They are added to the sample in a known amount, and their concentration is measured after the sample has been analyzed.

Here is a summary of the different types of standards:

• Primary standard: A material with a known concentration of a substance.
• Secondary standard: A material that has been calibrated against a primary standard.
• Tertiary standard: A material that has been calibrated against a secondary standard.
• Internal standard: A material that is added to a sample in a known amount to quantify the amount of another substance in the sample.