Which type of testing provides measurable amounts of a substance?

Quantitative testing is the type of testing that provides measurable amounts of a substance. This method focuses on the precise measurement of analytes in a sample, allowing for the determination of concentration levels or exact quantities. In various fields such as chemistry and laboratory testing, quantitative methods rely on numerical data and statistical analysis to provide reliable results about the amount of a substance present.

For example, in a clinical setting, quantitative tests can measure the concentration of glucose in blood samples in milligrams per deciliter, providing essential information for diagnosing and managing diabetes. The emphasis on measurable results distinguishes quantitative testing from qualitative testing, which only determines whether a substance is present or absent, without providing specifics on the amount. Comparative testing focuses on evaluating differences between groups or conditions and does not quantify substances directly. Descriptive testing typically involves a narrative or subjective assessment of samples, such as appearance or smell, rather than providing numerical data.