acid test

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acid test

test of genuineness for gold; not destructive of genuine metal. [Assaying: Brewer Dictionary, 7]
References in periodicals archive ?
Although the introduction of nucleic acid tests may dramatically decrease the time necessary for diagnosis, this technology is often limited by cumbersome requirements for chemical extraction of nucleic acid from patient samples.
Gen-Probe Incorporated is a global leader in the development, manufacture and marketing of rapid, accurate and cost-effective nucleic acid tests (NATs) that are used primarily to diagnose human diseases and screen donated human blood.
Thurston has had a whole range of acid tests to confirm the accuracy of his records, among them phone calls from the emergency room about patients who have only the haziest idea of what medications they are on and almost none about their allergies.