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en.wikipedia.org/wiki/Presumptive_and_confirmatory_tests

Presumptive tests, in medical and forensic science, analyze a sample and establish one of the following: . The sample is definitely not a certain substance. The sample probably is the substance. For example, the Kastle–Meyer test will show either that a sample is not blood or that the sample is probably blood but may be a less common substance. Further chemical tests are needed to prove that ...

www.merriam-webster.com/dictionary/presumptive

Presumptive definition is - based on probability or presumption. How to use presumptive in a sentence.

www.dictionary.com/browse/presumptive

Presumptive definition, affording ground for presumption: presumptive evidence. See more.

definitions.uslegal.com/p/presumptive-test

A presumptive test is one used in criminal investigations which is not conclusive, but is used to screen for the presence of a substance. For example, a presumptive test may be used to determine the presence of blood, seminal fluid, or drugs. The results of a presumptive test will not conclusively prove or disprove the presence of the substance.

www.khou.com/article/news/health/coronavirus/what-is-a-presumptive-positive...

HOUSTON — Health officials in Fort Bend County on Wednesday said a man had a "presumptive positive" coronavirus test. After the announcement was made, many people were left wondering what ...

www.reference.com/world-view/presumptive-test-79d6a1c50957d9f8

Presumptive tests are used to determine whether a specific chemical is present in a solution. These tests are commonly used to detect whether someone has drugs in their system. A presumptive test indicates whether there has been a reaction between a substance and a particular chemical. It will demonstrate this chemical reaction by changing color.

www.tampabay.com/news/health/2020/03/11/a-coronavirus-glossary-from...

Presumptive positive case vs. confirmed case. ... Laboratory confirmed cases must test positive at a CDC ... The CDC’s definition recommends staying about six feet of away from others when ...

www.sog.unc.edu/sites/www.sog.unc.edu/files/course_materials/Presumptive and...

Presumptive and Confirmatory Forensic Tests Definitions: Presumptive tests - can establish the possibility that a substance, bodily tissue or fluid is present Confirmatory tests - are used to conclusively identify a substance or specific biological material References: President’s DNA Initiative (for serology tests)

www.experts.com/articles/presumptive-testing-by-jerald-cook

Without confirmatory testing, a positive presumptive test result can easily be misinterpreted. Presumptive tests should be thought of as screening tests only, indicating that confirmatory testing (usually a more expensive and slower process) is indicated. Cross reactivity is one of the biggest concerns with presumptive testing.

www.thefreedictionary.com/presumptive

Define presumptive. presumptive synonyms, presumptive pronunciation, presumptive translation, English dictionary definition of presumptive. adj. 1. Based on a presumption; presumed: the party's presumptive nominee.